15,483 results on '"interventional radiology"'
Search Results
2. Changes in perfusion angiography after IVC filter placement and retrieval
- Author
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Shreve, Lauren A, Lam, Alexander, Badin, Dylan, Nelson, Kari, Katrivesis, James, Fernando, Dayantha, and Abi-Jaoudeh, Nadine
- Subjects
Biomedical and Clinical Sciences ,Clinical Sciences ,Clinical Research ,Humans ,Retrospective Studies ,Vena Cava ,Inferior ,Device Removal ,Perfusion ,Vena Cava Filters ,Angiography ,Digital Subtraction ,Treatment Outcome ,venous thromboembolism ,inferior vena cava filter ,perfusion angiography ,deep venous thrombosis ,pulmonary embolism ,interventional radiology ,hemodynamics - Abstract
Inferior vena cava (IVC) filters are posited to effect flow dynamics, causing turbulence, vascular remodeling and eventual thrombosis; however, minimal data exists evaluating hemodynamic effects of IVC filters in vivo. The purpose of this study was to determine differences in hemodynamic flow parameters acquired with two-dimension (2D)-perfusion angiography before and after IVC filter placement or retrieval. 2D-perfusion images were reconstructed retrospectively from digital subtraction angiography from a cohort of 37 patients (13F/24M) before and after filter placement (n = 18) or retrieval (n = 23). Average dwell time was 239.5 ± 132.1 days. Changes in the density per pixel per second within a region of interest (ROI) were used to calculate contrast arrival time (AT), time-to-peak (TTP), wash-in-rate (WIR), and mean transit time (MTT). Measurements were obtained superior to, inferior to, and within the filter. Differences in hemodynamic parameters before and after intervention were compared, as well as correlation between parameters versus filter dwell time. A P value with Bonferroni correction of
- Published
- 2022
3. MRI-guided endovascular intervention: current methods and future potential.
- Author
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Kilbride, Bridget, Jordan, Caroline, Mueller, Kerstin, Moore, Teri, Martin, Alastair, Wilson, Mark, Hetts, Steven, and Narsinh, Kazim
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MRI safety ,MRI-guided ,endovascular intervention ,interventional MRI ,interventional radiology ,minimally invasive surgery ,real-time MRI ,robot-assisted ,Humans ,Magnetic Resonance Imaging ,Catheters - Abstract
INTRODUCTION: Image-guided endovascular interventions, performed using the insertion and navigation of catheters through the vasculature, have been increasing in number over the years, as minimally invasive procedures continue to replace invasive surgical procedures. Such endovascular interventions are almost exclusively performed under x-ray fluoroscopy, which has the best spatial and temporal resolution of all clinical imaging modalities. Magnetic resonance imaging (MRI) offers unique advantages and could be an attractive alternative to conventional x-ray guidance, but also brings with it distinctive challenges. AREAS COVERED: In this review, the benefits and limitations of MRI-guided endovascular interventions are addressed, systems and devices for guiding such interventions are summarized, and clinical applications are discussed. EXPERT OPINION: MRI-guided endovascular interventions are still relatively new to the interventional radiology field, since significant technical hurdles remain to justify significant costs and demonstrate safety, design, and robustness. Clinical applications of MRI-guided interventions are promising but their full potential may not be realized until proper tools designed to function in the MRI environment are available. Translational research and further preclinical studies are needed before MRI-guided interventions will be practical in a clinical interventional setting.
- Published
- 2022
4. Migration of vascular embolisation material from the intravascular space to surrounding interstitial tissues in arteriovenous malformations.
- Author
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Patel, Rohini, Cosman, Bard, Owens, Erik, and Malas, Mahmoud
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General surgery ,Interventional radiology ,Radiology ,Vascular surgery ,Embolization ,Therapeutic ,Humans ,Intracranial Arteriovenous Malformations ,Male ,Postoperative Complications ,Treatment Outcome - Abstract
We present the case of a young man active duty in the military who initially presented with pelvic pain and fullness during sexual activity. Extensive workup showed a large pelvic arteriovenous malformation (AVM). He underwent over 10 interventional radiology procedures to embolise his AVM and suffered multiple postoperative complications resulting in exploratory laparotomies, bowel resections and ultimately a colostomy. Six years after his embolisation procedures, he was found on imaging to have gluteal fluid collections with metallic particles, presumed to be migrated Onyx from his angioembolisations as a result of non-target embolisation. Current literature does not document other instances of Onyx material migrating from an intravascular source to interstitial tissue.
- Published
- 2022
5. Utility of Intraprocedural Contrast-Enhanced CT in Ablation of Renal Masses.
- Author
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Grewal, Arleen, Khera, Satinderpal Singh, McGahan, John P, Wilson, Machelle, Loehfelm, Thomas W, Dall'Era, Marc A, and Evans, Christopher P
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Biomedical and Clinical Sciences ,Clinical Sciences ,Kidney Disease ,Aged ,Contrast Media ,Female ,Humans ,Intraoperative Care ,Kidney Neoplasms ,Male ,Radiofrequency Ablation ,Retrospective Studies ,Surgery ,Computer-Assisted ,Tomography ,X-Ray Computed ,interventional radiology ,radiofrequency ablation ,renal mass ,Nuclear Medicine & Medical Imaging ,Clinical sciences - Abstract
OBJECTIVE. The purpose of this study was to evaluate the efficacy of radiofrequency ablation (RFA) of renal masses comparing a group who did not undergo intraprocedural CT and a group who did. MATERIALS AND METHODS. A retrospective review included 45 consecutively registered patients who underwent RFA of renal masses. If an adequate biopsy specimen was not obtained or follow-up was inadequate, the patient was eliminated from review from calculation of primary technical efficacy. The inclusion criterion was having undergone RFA with two cooled-tip electrodes. Baseline demographics (age, body mass index, and sex), renal mass characteristics (diameter, side, location, position, morphologic features, type of mass, and grade), technical details (repositioning and hydrodissection), and complications were evaluated. Follow-up images were evaluated to determine the presence of recurrence at the ablation site in the two groups. RESULTS. Among the 45 patients who underwent RFA, 13 did not undergo intraprocedural CT and 32 intraprocedural did. Thirty-five patients met the criteria for follow-up and positive biopsy results. For calculation of recurrence, 10 patients were in the group who did not and 25 were in group who did undergo intraprocedural contrast-enhanced CT. No correlation was found between baseline demographics, renal mass characteristics, and technical results of the two groups. There was an 89% overall technical efficacy rate with a 96% primary technical efficacy rate in the group who underwent intraprocedural CT compared with a 70% rate in the group who did not undergo intraprocedural CT. Negative correlation was found between the groups with respect to technical efficacy rate at p < 0.05. CONCLUSION. Intraprocedural contrast-enhanced CT yields important information about completeness of ablation during the procedure, allowing probe repositioning and thus better therapeutic effect.
- Published
- 2020
6. Combination of high-resolution cone beam computed tomography and metal artefact reduction software: a new image fusion technique for evaluating intracranial stent apposition after aneurysm treatment.
- Author
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Ishibashi, Toshihiro, Dahmani, Chihebeddine, Kato, Naoki, Ikemura, Ayako, Abe, Yukiko, Otani, Katharina, Kodama, Tomonobu, Kan, Issei, Nishimura, Kengo, Murayama, Yuichi, and Yuki, Ichiro
- Subjects
interventional radiology ,neuroimaging ,neurosurgery ,stroke ,Adult ,Aged ,Angiography ,Digital Subtraction ,Carotid Artery ,Internal ,Cone-Beam Computed Tomography ,Embolization ,Therapeutic ,Endovascular Procedures ,Female ,Humans ,Imaging ,Three-Dimensional ,Intracranial Aneurysm ,Male ,Stents - Abstract
We introduce a new imaging technique to improve visualisation of stent apposition after endovascular treatment of brain aneurysms employing high-resolution cone beam CT and three-dimensional digital subtraction angiography. After performing a stent-assisted coil embolisation of brain aneurysm, the image datasets were processed with a metal artefact reduction software followed by the automated image fusion programmes. Two patients who underwent aneurysm coiling using a Neuroform stent were evaluated. The reconstructed 3D images showed a detailed structure of the stent struts and identified malappositions of the deployed stents. Case 1 showed good apposition on the outer curvature side of the carotid siphon, while the inner curvature side showed prominent malapposition. Case 2, with multiple aneurysms, showed good apposition on both outer and inner curvature sides, although inward prolapse of the struts was observed. This new imaging technique may help evaluate stent apposition after the endovascular aneurysm treatment.
- Published
- 2019
7. Combination of high-resolution cone beam computed tomography and metal artefact reduction software: a new image fusion technique for evaluating intracranial stent apposition after aneurysm treatment.
- Author
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Yuki, Ichiro, Ishibashi, Toshihiro, Dahmani, Chihebeddine, Kato, Naoki, Ikemura, Ayako, Abe, Yukiko, Otani, Katharina, Kodama, Tomonobu, Kan, Issei, Nishimura, Kengo, and Murayama, Yuichi
- Subjects
Carotid Artery ,Internal ,Humans ,Intracranial Aneurysm ,Imaging ,Three-Dimensional ,Angiography ,Digital Subtraction ,Embolization ,Therapeutic ,Stents ,Adult ,Aged ,Female ,Male ,Cone-Beam Computed Tomography ,Endovascular Procedures ,interventional radiology ,neuroimaging ,neurosurgery ,stroke ,Carotid Artery ,Internal ,Imaging ,Three-Dimensional ,Angiography ,Digital Subtraction ,Embolization ,Therapeutic ,Clinical Sciences - Abstract
We introduce a new imaging technique to improve visualisation of stent apposition after endovascular treatment of brain aneurysms employing high-resolution cone beam CT and three-dimensional digital subtraction angiography. After performing a stent-assisted coil embolisation of brain aneurysm, the image datasets were processed with a metal artefact reduction software followed by the automated image fusion programmes. Two patients who underwent aneurysm coiling using a Neuroform stent were evaluated. The reconstructed 3D images showed a detailed structure of the stent struts and identified malappositions of the deployed stents. Case 1 showed good apposition on the outer curvature side of the carotid siphon, while the inner curvature side showed prominent malapposition. Case 2, with multiple aneurysms, showed good apposition on both outer and inner curvature sides, although inward prolapse of the struts was observed. This new imaging technique may help evaluate stent apposition after the endovascular aneurysm treatment.
- Published
- 2019
8. Flow-directed micro-catheterisation technique over a detachable coil
- Author
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Ullman, Henrik, Jones, Jesse, Kaneko, Naoki, and Tateshima, Satoshi
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Biomedical and Clinical Sciences ,Pediatric ,Angiography ,Digital Subtraction ,Catheterization ,Cerebral Veins ,Embolization ,Therapeutic ,Female ,Humans ,Infant ,Newborn ,Intracranial Arteriovenous Malformations ,neuroimaging ,radiology ,interventional radiology ,congenital disorders ,Clinical Sciences ,Biomedical and clinical sciences ,Health sciences - Abstract
Embolisation of neonatal arteriovenous shunts poses several challenges: tortuous and fragile vessels, limited contrast volume and few specialised paediatric endovascular devices. In a 9-day-old patient with a choroidal type vein of Galen malformation we encountered an extremely tortuous posterior choroidal artery pedicle during endovascular treatment. After attempted selection using a traditional over-the-wire technique, we advanced a platinum coil through the micro-catheter. High flow within the feeder directed the soft and malleable coil anterograde. We then advanced the catheter over the coil's pusher wire in a facile manner to an ideal position for embolisation. This approach may be especially useful in cases requiring coil/vinyl-based liquid embolics, given that the only flow-directed micro-catheter available to most operators is compatible with n-Butyl cyanoacrylate alone. Moreover, the soft distal portion of coil may impart a safety benefit over traditional guidewires in easily perforated neonatal vasculature.
- Published
- 2019
9. Multiple pipeline twists encountered during treatment of a symptomatic fusiform ICA aneurysm
- Author
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Young, Robert W, Bender, Matthew T, Colby, Geoffrey P, and Coon, Alexander L
- Subjects
Biomedical and Clinical Sciences ,Neurosciences ,Angiography ,Digital Subtraction ,Angioplasty ,Balloon ,Carotid Artery ,Internal ,Embolization ,Therapeutic ,Humans ,Intracranial Aneurysm ,Middle Aged ,interventional radiology ,neurosurgery ,stroke ,Clinical Sciences ,Biomedical and clinical sciences ,Health sciences - Abstract
Pipeline embolisation device (PED) 'twisting' is an intra-operative complication that manifests with the appearance of a 'figure-8' in perpendicular planes on digital subtraction angiography. A twisted PED causes narrowing and/or complete occlusion of the vessel lumen and poses significant risks for thrombus formation and downstream ischaemia. Here, we present a case in which three unique PED implants become twisted during pipeline embolisation of a large fusiform internal carotid artery aneurysm. The twists were remediated by balloon angioplasty and a combination of techniques that allowed the PED to rotate and restore its original axis. Six-month and twelve-month follow-up angiography demonstrated complete aneurysm occlusion with preservation of the parent vessel, proving that proper remediation of PED twisting can still result in successful long-term outcomes.
- Published
- 2019
10. Characteristics of a New X-Ray Imaging System for Interventional Procedures: Improved Image Quality and Reduced Radiation Dose
- Author
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Schernthaner, Ruediger E, Haroun, Reham R, Nguyen, Sonny, Duran, Rafael, Sohn, Jae Ho, Sahu, Sonia, Chapiro, Julius, Zhao, Yan, Radaelli, Alessandro, van der Bom, Imramsjah M, Mauti, Maria, Hong, Kelvin, Geschwind, Jean-François H, and Lin, MingDe
- Subjects
Biomedical and Clinical Sciences ,Oncology and Carcinogenesis ,Clinical Research ,Biomedical Imaging ,Adult ,Angiography ,Digital Subtraction ,Female ,Fluoroscopy ,Humans ,Image Processing ,Computer-Assisted ,Leiomyoma ,Middle Aged ,Radiation Dosage ,Radiography ,Interventional ,Reproducibility of Results ,Retrospective Studies ,Uterine Artery ,Uterine Artery Embolization ,X-Rays ,Image quality enhancement ,Interventional radiology ,Radiation dosage ,Cardiorespiratory Medicine and Haematology ,Nuclear Medicine & Medical Imaging ,Cardiovascular medicine and haematology - Abstract
PURPOSE:To compare image quality and radiation exposure between a new angiographic imaging system and the preceding generation system during uterine artery embolization (UAE). MATERIALS AND METHODS:In this retrospective, IRB-approved two-arm study, 54 patients with symptomatic uterine fibroids were treated with UAE on two different angiographic imaging systems. The new system includes optimized acquisition parameters and real-time image processing algorithms. Air kerma (AK), dose area product (DAP) and acquisition time for digital fluoroscopy (DF) and digital subtraction angiography (DSA) were recorded. Body mass index was noted as well. DF image quality was assessed objectively by image noise measurements. DSA image quality was rated by two blinded, independent readers on a four-rank scale. Statistical differences were assessed with unpaired t tests and Wilcoxon rank-sum tests. RESULTS:There was no significant difference between the patients treated on the new (n = 36) and the old system (n = 18) regarding age (p = 0.10), BMI (p = 0.18), DF time (p = 0.35) and DSA time (p = 0.17). The new system significantly reduced the cumulative AK and DAP by 64 and 72%, respectively (median 0.58 Gy and 145.9 Gy*cm2 vs. 1.62 Gy and 526.8 Gy*cm2, p
- Published
- 2018
11. Proving Value in Radiology: Experience Developing and Implementing a Shareable Open Source Registry Platform Driven by Radiology Workflow
- Author
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Gichoya, Judy Wawira, Kohli, Marc D, Haste, Paul, Abigail, Elizabeth Mills, and Johnson, Matthew S
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Biomedical and Clinical Sciences ,Clinical Sciences ,Health Services ,Clinical Research ,Networking and Information Technology R&D (NITRD) ,Generic health relevance ,Good Health and Well Being ,Humans ,Quality Improvement ,Radiology ,Radiology Information Systems ,Registries ,Workflow ,Interventional radiology ,Database ,Quality improvement ,Research infrastructure ,Open source ,Value based care ,Nuclear Medicine & Medical Imaging ,Clinical sciences - Abstract
Numerous initiatives are in place to support value based care in radiology including decision support using appropriateness criteria, quality metrics like radiation dose monitoring, and efforts to improve the quality of the radiology report for consumption by referring providers. These initiatives are largely data driven. Organizations can choose to purchase proprietary registry systems, pay for software as a service solution, or deploy/build their own registry systems. Traditionally, registries are created for a single purpose like radiation dosage or specific disease tracking like diabetes registry. This results in a fragmented view of the patient, and increases overhead to maintain such single purpose registry system by requiring an alternative data entry workflow and additional infrastructure to host and maintain multiple registries for different clinical needs. This complexity is magnified in the health care enterprise whereby radiology systems usually are run parallel to other clinical systems due to the different clinical workflow for radiologists. In the new era of value based care where data needs are increasing with demand for a shorter turnaround time to provide data that can be used for information and decision making, there is a critical gap to develop registries that are more adapt to the radiology workflow with minimal overhead on resources for maintenance and setup. We share our experience of developing and implementing an open source registry system for quality improvement and research in our academic institution that is driven by our radiology workflow.
- Published
- 2017
12. Staged curative treatment of a complex direct carotid-cavernous fistula with a large arterial defect and an 'oversized' internal carotid artery
- Author
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Bender, Matthew T, Lin, Li-Mei, Coon, Alexander L, and Colby, Geoffrey P
- Subjects
Biomedical and Clinical Sciences ,Health Sciences ,Neurosciences ,Clinical Research ,Accidents ,Traffic ,Adult ,Aneurysm ,False ,Carotid Artery ,Internal ,Carotid-Cavernous Sinus Fistula ,Cerebral Angiography ,Diagnosis ,Differential ,Diplopia ,Embolization ,Therapeutic ,Humans ,Male ,Vascular Surgical Procedures ,Interventional radiology ,Neurosurgery ,Surgery ,Clinical Sciences ,Biomedical and clinical sciences ,Health sciences - Abstract
This is a case of a high-flow, post-traumatic direct carotid-cavernous fistula with a widened arterial defect and a large-diameter internal carotid artery (ICA). The unique aspect of this case is the oversized ICA, >8mm in diameter, which is both a pathological and a therapeutic challenge, given the lack of available neuroendovascular devices for full vessel reconstruction. We present a planned two-stage embolisation paradigm for definitive treatment. Transarterial coil embolisation is performed as the first stage to disconnect the fistula and normalise flow in the ICA. A 3-month recovery period is then allowed for reduction in carotid diameter. Repair of the large vessel defect and pseudoaneurysm is performed as a second stage in a delayed fashion with a flow-diverting device. Follow-up angiography at 6 months demonstrates obliteration of the fistula and curative ICA reconstruction to a diameter
- Published
- 2017
13. Synchronous association of hepatocellular carcinoma and cystic echinococcosis with unusual pathology: report on diagnostic and pathological variability
- Author
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Raghavendra Babu, Sushrutha Chikkanayakanahalli Suresh, Nagesh N Swamy, and Pritik A Shah
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Male ,Pathology ,medicine.medical_specialty ,Carcinoma, Hepatocellular ,Abdominal cavity ,Echinococcosis ,Zoonoses ,parasitic diseases ,medicine ,Outpatient clinic ,Animals ,Humans ,Cyst ,Echinococcus granulosus ,Aged ,medicine.diagnostic_test ,biology ,business.industry ,Liver Neoplasms ,Interventional radiology ,General Medicine ,Pathology Report ,medicine.disease ,biology.organism_classification ,Echinococcus ,medicine.anatomical_structure ,Hepatocellular carcinoma ,Abdomen ,business - Abstract
Cystic hydatid disease or cystic echinococcosis (CE) is a globally endemic zoonosis caused by the larval cyst stage of the tapeworm Echinococcus granulosus. Concomitant presence of CE and hepatocellular carcinoma (HCC) is a rare clinical scenario. A 70-year-old male patient presented with acute abdominal pain to the surgical outpatient department. On evaluation, a cystic lesion with solid components and free fluid in the abdomen was observed, which led to multiple differentials in the working diagnosis. A CT showed the mass to have a delayed enhancement. Surgical exploration revealed a partially ruptured hydatid cyst with daughter cysts in the abdominal cavity and a solid-component mass lesion. We proceeded with a right partial hepatectomy. Pathological evaluation revealed a pale mass lesion with a large collapsed cyst. HCC with unusual dense fibrillar fibrosis and cystic interface with normal parenchyma was observed. This case connects the multimodal assessment of radiology, surgery and pathology.
- Published
- 2023
14. Mycotic aortic aneurysm formation following intravesical BCG treatment for transitional cell carcinoma of the bladder
- Author
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Jill O'Donnell, David Flynn, Shradha Subedi, Jonathan Langton, Keat Choong, and Akihiro Ogi
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Male ,medicine.medical_specialty ,Abdominal pain ,Tuberculosis ,Antitubercular Agents ,Pseudoaneurysm ,Aortic aneurysm ,Aneurysm ,medicine ,Humans ,cardiovascular diseases ,Aged ,Carcinoma, Transitional Cell ,medicine.diagnostic_test ,business.industry ,Interventional radiology ,General Medicine ,Mycotic aneurysm ,medicine.disease ,Surgery ,Aortic Aneurysm ,Transitional cell carcinoma ,Administration, Intravesical ,Urinary Bladder Neoplasms ,cardiovascular system ,BCG Vaccine ,medicine.symptom ,business ,Aneurysm, Infected ,Aortic Aneurysm, Abdominal - Abstract
Mycotic aneurysms are rare and if left untreated, can have devastating outcomes. In this case, a 72-year-old man presented to hospital with fevers, night sweats and abdominal pain. A CT scan revealed the development an infrarenal pseudoaneurysm over the course of 8 weeks, increasing from 2.8 cm to a 3.1 cm. The aneurysm was not present on a CT scan performed 6 months earlier. The patient underwent an emergency endovascular repair of the aortic aneurysm (EVAR) and was placed on broad-spectrum antibiotics. Intra-aortic blood cultures aspirated adjacent to the aneurysm and tissue biopsy confirmed tuberculosis bovis as the cause of the mycotic aneurysm. The patient had been treated with intravesical BCG for transitional cell carcinoma of the bladder several months prior. The patient was treated with an extended course of antituberculosis medication. He recovered well and was back to his baseline function within weeks.
- Published
- 2023
15. Pulmonary sequestration in an adult patient without prior pulmonary conditions
- Author
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Norman Randy Kolb, Kento Sonoda, and Yasuharu Tokuda
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Adult ,Lung Diseases ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Vital signs ,Interventional radiology ,General Medicine ,Disease ,Emergency department ,medicine.disease ,Respiratory Medicine ,Pulmonary sequestration ,Peptic ulcer ,Emergency medicine ,medicine ,Humans ,Chest tightness ,Bronchopulmonary Sequestration ,business ,Tomography, X-Ray Computed - Abstract
A 36-year-old man with peptic ulcer disease presented to the emergency department with a 2-day history of haemoptysis and cough. Though he had no prior pulmonary symptoms, he noted progressive chest tightness and shortness of breath. He had no fever or night sweats. Vital signs were afebrile and
- Published
- 2023
16. Staged embolisation of a giant torcular dural sinus malformation in a neonate
- Author
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Evan Luther, Robert M. Starke, Hunter King, and Aria M. Jamshidi
- Subjects
Intracranial Arteriovenous Malformations ,medicine.medical_specialty ,Cranial Sinuses ,Dural sinus ,Pregnancy ,Medicine ,Humans ,Child ,Central Nervous System Vascular Malformations ,Surgical approach ,medicine.diagnostic_test ,business.industry ,Ultrasound ,Infant, Newborn ,Infant ,Interventional radiology ,General Medicine ,medicine.disease ,Embolization, Therapeutic ,Hydrocephalus ,In utero ,Female ,Radiology ,Neurosurgery ,business - Abstract
Torcular dural sinus malformations (tDSMs) represent a rare subset of paediatric cerebrovascular malformations and are often diagnosed antenatally via ultrasound. The management of these in utero lesions remains controversial as previous studies suggested elective termination of the pregnancy because of their presumably high mortality and severe long-term morbidity. However, more recent evaluations have suggested that the overall prognosis for infants harbouring these lesions may be much better than previously believed. As such, we present the case of a neonate with a giant tDSM, diagnosed in utero, who was treated postnatally via staged transarterial and transvenous embolisation to alleviate worsening obstructive hydrocephalus and brainstem compression. We provide details regarding the surgical approach and long-term neurological outcomes for this patient. To the best of our knowledge, this is one of the largest reported tDSM presented in the literature.
- Published
- 2023
17. Multidisciplinary management of solitary hypervascular metastatic recurrence of renal cell carcinoma presenting with pathological femoral fracture
- Author
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Nitasha Mishra, Sudipta Mohakud, Nerbadyswari Deep Bag, and Sujit Kumar Tripathy
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Male ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Interventional radiology ,General Medicine ,Femoral fracture ,Middle Aged ,medicine.disease ,Embolization, Therapeutic ,Kidney Neoplasms ,Metastasis ,Vascularity ,Fractures, Spontaneous ,Blood loss ,Renal cell carcinoma ,Orthopedic surgery ,medicine ,Humans ,Radiology ,medicine.symptom ,business ,Pathological ,Carcinoma, Renal Cell ,Femoral Fractures - Abstract
Renal cell carcinoma (RCC) frequently presents with osseous metastasis, predominantly lytic and prone to pathological fracture. The metastatic lesion in the extremity presents with local swelling, pain and immobility due to pathological fracture. The solitary or oligometastatic lesions should be treated with curative intent, which can help the patient to lead a more prolonged and disability-free life. The RCCs and their metastases are hypervascular with an exuberant arterial supply. Surgery can lead to uncontrolled life-threatening haemorrhage. Preoperative transarterial embolisation reduces tumour vascularity significantly and reduces intraoperative blood loss. We present a 46-year-old male patient with solitary hypervascular metastatic recurrence of RCC with a pathological femoral fracture with an infeasible initial surgery due to profuse haemorrhage. He was successfully treated by preoperative transarterial embolisation, followed by surgical resection and implantation of a megaprosthesis. Multidisciplinary management reduces patient morbidity and mortality with successful treatment in solitary hypervascular metastasis from RCC.
- Published
- 2023
18. Mechanical thrombectomy through a 'carotid-carotid bypass'
- Author
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Prashanth Reddy, Mudassar Kamran, and Satya Narayana Patro
- Subjects
medicine.medical_specialty ,Weakness ,Middle Cerebral Artery ,Aspiration catheter ,medicine.diagnostic_test ,business.industry ,Penumbra ,Interventional radiology ,Infarction, Middle Cerebral Artery ,General Medicine ,medicine.disease ,Surgery ,Mechanical thrombectomy ,Stroke ,Treatment Outcome ,Left middle cerebral artery ,medicine ,Humans ,Distal segment ,Stents ,medicine.symptom ,business ,Aged ,Thrombectomy - Abstract
An elderly patient presented with acute-onset right-sided weakness and aphasia. A large penumbra was noted in the left middle cerebral artery (MCA) territory without any infarct core. The patient was noted to have a carotid–carotid bypass. This posed certain technical challenge in accessing the intracranial circulation across the carotid bypass; however, the guiding catheter with soft distal segment was successfully navigated coaxially over the aspiration catheter across the bypass and intracranial circulation was accessed for mechanical thrombectomy. Complete recanalisation and reperfusion were achieved with significant neurological recovery of the patient post-thrombectomy. The aim of this report is to emphasise on this rarely encountered situation in thrombectomy and its successful management. The procedure should not be delayed or deferred due to lack of operator experience.
- Published
- 2023
19. Radical treatment of ruptured dissecting aneurysm on the P1 segment with monotherapy using multiple LVIS stents
- Author
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Masashi Shigeyasu, Nobuyuki Sakai, Hirotoshi Imamura, and Natsuhi Sasaki
- Subjects
medicine.medical_specialty ,Posterior cerebral artery ,Aneurysm, Ruptured ,Lesion ,Aneurysm ,medicine.artery ,medicine ,Humans ,cardiovascular diseases ,Endovascular treatment ,Retrospective Studies ,Radical treatment ,medicine.diagnostic_test ,business.industry ,Endovascular Procedures ,Interventional radiology ,Intracranial Aneurysm ,General Medicine ,medicine.disease ,Embolization, Therapeutic ,Surgery ,Cerebral Angiography ,Aortic Dissection ,medicine.anatomical_structure ,Treatment Outcome ,cardiovascular system ,Stents ,Neurosurgery ,medicine.symptom ,business ,Artery - Abstract
The standard endovascular treatment for ruptured dissecting aneurysm is a parent artery occlusion. However, this treatment is unsuitable when the artery of the lesion gives off perforating vessels that supply blood to critical regions or when the collateral flow cannot be expected due to the sacrifice of the parent artery. Here, we present an infrequent case of ruptured dissecting aneurysm on P1 segment of the posterior cerebral artery. The aneurysm had little sac for coiling and the artery of the lesion had some perforator branches; thus, we selected the monotherapy with three overlapping low-profile visualised intraluminal support stents as radical treatment, which resulted in prompt obliteration of the aneurysm. The patient was fully recovered at 3 months after the procedure. Previous studies have reported the effectiveness of multiple stents alone for dissecting aneurysms, whereas this case showed that overlapping stents may also be effective on the P1 segment.
- Published
- 2023
20. Vena cava filter placement in a duplicated infrarenal inferior cava venous system with azygous continuation
- Author
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Mauricio Danckers, Roberto Fourzali, and Gustavo Lagrotta
- Subjects
medicine.medical_specialty ,Vena Cava Filters ,Vena cava ,medicine.diagnostic_test ,business.industry ,Atrial fibrillation ,Interventional radiology ,Vena Cava, Inferior ,General Medicine ,Return of spontaneous circulation ,medicine.disease ,Filter (video) ,Internal medicine ,medicine ,Cardiology ,Humans ,Left superior ,business ,Pulmonary Embolism - Abstract
A 50-year-old man with atrial fibrillation without anticoagulation presented to the hospital after tonic–clonic seizures, followed by pulseless cardiopulmonary arrest with return of spontaneous circulation after 2 min. Imaging demonstrated a left superior cerebellar thromboembolic ischaemic
- Published
- 2023
21. Comprehensive overview of the venous disorder known as pelvic congestion syndrome
- Author
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Bałabuszek, Kamil, Toborek, Michał, and Pietura, Radosław
- Subjects
Review Article ,General Medicine ,chronic pelvic pain ,Pelvic Pain ,Embolization, Therapeutic ,Pelvis ,Varicose Veins ,pelvic venous disorders ,interventional radiology ,Humans ,Medicine ,Female ,Pregnancy, Childbirth & Women’s Health ,pelvic congestion syndrome - Abstract
Pelvic venous disorders (PeVD) also known as Pelvic Congestion Syndrome (PCS) affect a great number of women worldwide and often remain undiagnosed. Gynecological symptoms caused by vascular background demand a holistic approach for appropriate diagnosis. This is a relevant cause of chronic pelvic pain and atypical varicose veins. The diagnosis is based on imaging studies and their correlation with clinical presentation. Although the aetiology of PCS still remains unclear, it may result from a combination of factors including genetic predisposition, anatomical abnormalities, hormonal factors, damage to the vein wall, valve dysfunction, reverse blood flow, hypertension and dilatation. The following paper describes an in-depth overview of anatomy, pathophysiology, symptoms, diagnosis and treatment of PCS. In recent years, minimally invasive interventions have become the method of first choice for the treatment of this condition. The efficacy of a percutaneous approach is high and it is rarely associated with serious complications.Key MessagesPelvic venous disorders demand a holistic approach for appropriate diagnosis.This article takes an in-depth look at existing therapies of Pelvic Congestion Syndrome and pathophysiology of this condition.Embolisation is an effective and safe treatment option.
- Published
- 2022
22. Early Lessons Learned with the Independent IR Residency Selection Process: Similarities and Differences From the Vascular and Interventional Radiology Fellowship
- Author
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M. Victoria Marx, Shantanu Warhadpande, Paul J. Rochon, S Sabri, Claire Kaufman, and Minhaj S. Khaja
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medicine.medical_specialty ,Career Choice ,medicine.diagnostic_test ,Process (engineering) ,business.industry ,Internship and Residency ,Interventional radiology ,Radiology, Interventional ,United States ,Education, Medical, Graduate ,Humans ,Medicine ,Radiology, Nuclear Medicine and imaging ,Medical physics ,Fellowships and Scholarships ,business ,Selection (genetic algorithm) - Published
- 2022
23. Percutaneous cryoablation
- Author
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D. J. van der Reijd, T. R. Baetens, F. Gomez Munoz, B. M. Aarts, M. J. Lahaye, N. M. Graafland, C. A. R. Lok, A. G. J. Aalbers, N. F. M. Kok, R. G. H. Beets-Tan, M. Maas, E. G. Klompenhouwer, RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy, School Office GROW, and Faculteit FHML Centraal
- Subjects
OUTCOMES ,RESECTION ,Radiological and Ultrasound Technology ,FEASIBILITY ,Urology ,Gastroenterology ,Abdominal Cavity ,Metastases ,Cryosurgery ,Kidney Neoplasms ,COLORECTAL-CANCER ,Treatment Outcome ,RENAL-CELL CARCINOMA ,Neoplasms ,Abdomen ,Interventional Radiology ,SURVEILLANCE ,Humans ,Radiology, Nuclear Medicine and imaging ,Female ,GUIDED CRYOABLATION ,Tomography, X-Ray Computed ,RECURRENCE ,Retrospective Studies - Abstract
Purpose To assess the primary safety and oncological outcome of percutaneous cryoablation in patients with non-visceral metastases of the abdominal cavity after prior surgery. Methods All patients with non-visceral metastases after prior abdominal surgery, treated with percutaneous cryoablation, and at least one year of follow-up were retrospectively identified. Technical success was achieved if the ice-ball had a minimum margin of 10 mm in three dimensions on the per-procedural CT images. Complications were recorded using the Society of Interventional Radiology (SIR) classification system. Time until disease progression was monitored with follow-up CT and/or MRI. Local control was defined as absence of recurrence at the site of ablation. Results Eleven patients underwent cryoablation for 14 non-visceral metastases (mean diameter 20 ± 9 mm). Primary tumor origin was renal cell (n = 4), colorectal (n = 3), granulosa cell (n = 2), endometrium (n = 1) and appendix (n = 1) carcinoma. Treated metastases were localized retroperitoneal (n = 8), intraperitoneal (n = 2), or in the abdominal wall (n = 4). Technical success was achieved in all procedures. After a median follow-up of 27 months (12–38 months), all patients were alive. Local control was observed in 10/14 non-visceral metastases, and the earliest local progression was detected after ten months. No major adverse events occurred. One patient suffered a minor asymptomatic adverse event. Conclusion This proof-of-concept study suggests that cryoablation can be a minimal invasive treatment option in a selected group of patients with non-visceral metastases in the abdominal cavity after prior surgery. Graphical abstract
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- 2022
24. Flat-panel detectors: how much better are they?
- Author
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Seibert, J Anthony
- Subjects
Biomedical and Clinical Sciences ,Clinical Sciences ,Biomedical Imaging ,Body Burden ,Equipment Design ,Humans ,Radiation Injuries ,Radiation Protection ,Radiographic Image Enhancement ,Technology Assessment ,Biomedical ,X-Ray Intensifying Screens ,flat-panel detectors ,fluoroscopy ,interventional radiology ,Paediatrics and Reproductive Medicine ,Nuclear Medicine & Medical Imaging ,Clinical sciences ,Paediatrics - Abstract
Interventional and fluoroscopic imaging procedures for pediatric patients are becoming more prevalent because of the less-invasive nature of these procedures compared to alternatives such as surgery. Flat-panel X-ray detectors (FPD) for fluoroscopy are a new technology alternative to the image intensifier/TV (II/TV) digital system that has been in use for more than two decades. Two major FPD technologies have been implemented, based on indirect conversion of X-rays to light (using an X-ray scintillator) and then to proportional charge (using a photodiode), or direct conversion of X-rays into charge (using a semiconductor material) for signal acquisition and digitization. These detectors have proved very successful for high-exposure interventional procedures but lack the image quality of the II/TV system at the lowest exposure levels common in fluoroscopy. The benefits for FPD image quality include lack of geometric distortion, little or no veiling glare, a uniform response across the field-of-view, and improved ergonomics with better patient access. Better detective quantum efficiency indicates the possibility of reducing the patient dose in accordance with ALARA principles. However, first-generation FPD devices have been implemented with less than adequate acquisition flexibility (e.g., lack of tableside controls/information, inability to easily change protocols) and the presence of residual signals from previous exposures, and additional cost of equipment and long-term maintenance have been serious impediments to purchase and implementation. Technological advances of second generation and future hybrid FPD systems should solve many current issues. The answer to the question "how much better are they?" is "significantly better", and they are certainly worth consideration for replacement or new implementation of an imaging suite for pediatric fluoroscopy.
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- 2006
25. Aorto-oesophageal fistula post-thoracic endovascular repair of type B aortic dissection: an uncommon catastrophic complication
- Author
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Sanjeev Kumar, Amit Ajit Deshpande, Rishabh Khurana, and Manish Shaw
- Subjects
Vascular Fistula ,medicine.medical_specialty ,medicine.diagnostic_test ,Aortic Aneurysm, Thoracic ,Type B aortic dissection ,business.industry ,False lumen ,Endovascular Procedures ,Aortic Diseases ,Interventional radiology ,General Medicine ,Surgery ,Aortic Dissection ,Esophageal Fistula ,medicine.artery ,cardiovascular system ,medicine ,Acute chest pain ,Thoracic aorta ,Humans ,Aorto-oesophageal fistula ,Complication ,business - Abstract
A 79-year-old hypertensive man with chronic type B aortic dissection (TBAD) came with acute chest pain. CT revealed partially thrombosed aneurysmal dilatation of false lumen, compressing trachea and oesophagus (chronic complicated TBAD) with the extremely tortuous descending thoracic aorta ([figures
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- 2023
26. Intraperitoneal migration of a hookwire following wide local excision of a breast lesion presenting as a spontaneous pneumothorax
- Author
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Falah El-Haddawi and Maximilian O. Joret
- Subjects
medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Breast surgery ,medicine.medical_treatment ,Wide local excision ,Pneumothorax ,Interventional radiology ,Physical examination ,Breast Neoplasms ,General Medicine ,Middle Aged ,medicine.disease ,Foreign Bodies ,Surgery ,Diaphragm (structural system) ,medicine ,Humans ,Female ,Foreign body ,Complication ,business ,Tomography, X-Ray Computed - Abstract
Hookwire migration is a rare complication of wide local excision surgery for breast neoplasia. We report the case of a 64-year-old woman who presented to hospital with acute on chronic left upper quadrant and left scapular pain. She had undergone a hookwire-guided wide local excision of a right breast neoplasm 5 years previously. Her vital signs, clinical examination and blood test were unremarkable. A CT scan revealed a left-sided pneumothorax and a 20 cm metallic intraperitoneal foreign body transpiercing the diaphragm. A review of the patient’s clinical record revealed that she experienced a vagal collapse during hookwire implantation. This article underlines the importance of clear communication between members of a multidisciplinary team involved in a staged surgical intervention and exemplifies that foreign bodies can migrate across large distances, sometimes against gravity, to cross multiple anatomical compartments and cause iatrogenic injuries multiple years after an index intervention
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- 2023
27. Rupture of splenic artery aneurysm in a man with polycythemia vera and acquired von Willebrand syndrome
- Author
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Fabio A Villada, Nathan L Law, and Matthew J Kruse
- Subjects
Male ,medicine.medical_specialty ,Abdominal pain ,Lightheadedness ,Splenic artery aneurysm ,Images In… ,Diaphoresis ,Polycythemia vera ,Acquired von Willebrand syndrome ,hemic and lymphatic diseases ,von Willebrand Factor ,medicine ,Humans ,Polycythemia Vera ,medicine.diagnostic_test ,business.industry ,Interventional radiology ,General Medicine ,Vascular surgery ,medicine.disease ,Aneurysm ,Surgery ,von Willebrand Diseases ,medicine.symptom ,business ,Splenic Artery - Abstract
A 65-year-old man experienced sudden onset of abdominal pain while working on his farm without significant trauma. He heard a ‘pop’ sound, followed by abdominal pain, lightheadedness and diaphoresis. He has a history of polycythemia vera (PV) and chronic severe splenomegaly, treated with
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- 2023
28. Uncommon traumatic anterior aortic dissection in the context of a blunt trauma
- Author
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Angelo La Valle, Michael Hall, Ramzi Freij, and A Brooks
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Aortic dissection ,medicine.medical_specialty ,medicine.diagnostic_test ,Images In… ,business.industry ,Major trauma ,General surgery ,Context (language use) ,Interventional radiology ,General Medicine ,medicine.disease ,Wounds, Nonpenetrating ,Aortic Dissection ,Blunt trauma ,medicine ,Humans ,business ,Motor vehicle crash - Abstract
This 79-year-old woman was involved in a road traffic collision in which another driver rear-ended her stationary car at a speed of around 70 m/h. She was transferred to the nearest Major Trauma Centre, where her observations remained stable and initial primary survey was unremarkable. She had a
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- 2023
29. Development of an Eye-Tracking Image Manipulation System for Angiography: A Comparative Study
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Takayoshi Terashita, Toshihiro Ogura, Norio Hayashi, Minoru Takahashi, Hiromitsu Hoshino, Haruyuki Watanabe, and Mitsuru Sato
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medicine.diagnostic_test ,Image manipulation ,Computer science ,business.industry ,education ,Angiography ,Uterine bleeding ,Interventional radiology ,Renal tumor ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,030220 oncology & carcinogenesis ,medicine ,Humans ,Eye tracking ,Radiology, Nuclear Medicine and imaging ,Computer vision ,Artificial intelligence ,Eye-Tracking Technology ,Statistical processing ,business ,Image display - Abstract
Rationale and Objectives Appropriate image manipulation of angiographic image display systems during interventional radiology is performed by radiological technologists and/or nurses given instructions from radiologists. However, appropriate images might not be displayed because of communication errors. Therefore, we developed a manipulation system that uses an eye tracker. The study aimed to determine if an angiographic image display system can be manipulated as well by using an eye tracker as by using a mouse. Materials and Methods An angiographic image display system using an eye tracker to calculate the gaze position on the screen and state of fixation was developed. Fourteen radiological technologists participated in an observer study by manipulating 10 images for each of 5 typical cases frequently performed in angiography, such as renal tumor, cerebral aneurysm, liver tumor, uterine bleeding, and hypersplenism. We measured the time from the start to the end of manipulating a series of images required when using the eye tracker and the conventional mouse. In this study, the statistical processing was done using Excel and R and R studio. Results The average time required for all observers for completing all cases was significantly shorter when using the eye tracker than when using the mouse (10.4 ± 2.1 s and 16.9 ± 2.6 s, respectively; p Conclusion Radiologists were able to manipulate an angiographic image display system directly by using the newly developed eye tracker system without touching contact devices, such as a mouse or angiography console. Therefore, communication error could be avoided.
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- 2022
30. Traumatic dissecting pathology of posterior cerebral artery: a report of two cases-aneurysm and pial arteriovenous fistula
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Vignesh Selvamurugan, Zafar Neyaz, Surya Nandan Prasad, and Vivek Singh
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Male ,Pathology ,medicine.medical_specialty ,Fistula ,Arteriovenous fistula ,Case Report ,Posterior cerebral artery ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Aneurysm ,medicine.artery ,medicine ,Humans ,cardiovascular diseases ,Posterior Cerebral Artery ,medicine.diagnostic_test ,business.industry ,Angiography, Digital Subtraction ,Interventional radiology ,Intracranial Aneurysm ,General Medicine ,Digital subtraction angiography ,Subarachnoid Hemorrhage ,medicine.disease ,Embolization, Therapeutic ,Cerebral Angiography ,Dissection ,Treatment Outcome ,Angiography ,Arteriovenous Fistula ,cardiovascular system ,business ,030217 neurology & neurosurgery - Abstract
We present two cases of 17-year-old man and 10-year-old boy presenting with subarachnoid haemorrhage and a history of road traffic accident. One patient had dissecting aneurysm of the posterior cerebral artery (PCA), and the other patient had partially thrombosed aneurysm on CT angiography. On digital subtraction angiography of the second patient, there was formation of PCA pontomesencephalic vein pial arteriovenous fistula (PAVF). Both the patients underwent endovascular treatment: stent-assisted coiling for aneurysm and coiling with parent vessel occlusion for PAVF. There were no procedural complications. Follow-up angiography showed no residual aneurysm or fistula. Trauma is one of the recognised causes of dissection, and intracranial dissections can present as stenotic lesions, aneurysms or fistulas, depending on the pathology. Traumatic dissecting PCA aneurysm has been reported in only two case reports previously, and post-traumatic PAVF in PCA has not been reported.
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- 2023
31. Successful multidisciplinary treatment of Doege-Potter syndrome: hypoglycaemia caused by paraneoplastic IGF-2 production by a metastatic haemangiopericytoma
- Author
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Jonathan Athayde, Jeffery K.T. Tong, Meghan Ho, and Shawn MacKenzie
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Male ,medicine.medical_specialty ,Paraneoplastic Syndromes ,030209 endocrinology & metabolism ,Case Report ,Malignancy ,Kidney ,Congenital Abnormalities ,03 medical and health sciences ,0302 clinical medicine ,Refractory ,Surgical oncology ,Insulin-Like Growth Factor II ,medicine ,Humans ,Doege–Potter syndrome ,medicine.diagnostic_test ,business.industry ,Interventional radiology ,General Medicine ,Hepatic tumour ,Middle Aged ,medicine.disease ,Debulking ,Hypoglycemia ,Surgery ,030220 oncology & carcinogenesis ,Kidney Diseases ,Complication ,business ,Hemangiopericytoma - Abstract
Hypoglycaemia due to insulin-like growth factor (IGF)-2 secretion is a paraneoplastic complication of malignancy with significant morbidity that can often go unrecognised due to its uncommon presentation. We report on a case of a 51-year-old man with metastatic haemangiopericytoma presenting with refractory hypoglycaemia, requiring continuous dextrose 10% infusion while in hospital. IGF-2 levels were significantly elevated, in keeping with a rare entity associated with solitary fibrous tumours, known as Doege-Potter syndrome. The patient was managed using uncooked cornstarch in conjunction with debulking of the hepatic tumour burden with bland IR-guided transarterial embolisation, and eventual surgical resection to treat his non-islet cell tumour hypoglycaemia (NICTH). The case highlights this rare paraneoplastic phenomenon that should be included in the differential for hypoglycaemia, especially if a history of a solitary fibrous tumour is elicited. Our case is the first to document a successful approach to treating the hypoglycaemia using preoperative transarterial bland embolisation.
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- 2023
32. Rare PTA variant (Saltzman type IIIa) associated with multiple cerebral aneurysms
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Amr Ewida, Grahame Gould, Odai Abdalla, and Rashid Ahmed
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0301 basic medicine ,medicine.medical_specialty ,Neurology ,Images In… ,Neurosurgery ,030105 genetics & heredity ,03 medical and health sciences ,0302 clinical medicine ,Neuroimaging ,Hyperlipidemia ,medicine ,Humans ,cardiovascular diseases ,Family history ,medicine.diagnostic_test ,business.industry ,Interventional radiology ,Intracranial Aneurysm ,General Medicine ,medicine.disease ,Cerebral Angiography ,Angiography ,Subarachnoid haemorrhage ,Radiology ,business ,030217 neurology & neurosurgery - Abstract
A 68-year-old woman with a history of hypertension, hyperlipidemia and 10 pack-year smoking history presented with sudden onset of the worst headache of her life. She denied any family history of brain aneurysms. CT angiography (CTA) revealed a subarachnoid haemorrhage due to a ruptured right
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- 2023
33. A fully automatic artificial intelligence-based CT image analysis system for accurate detection, diagnosis, and quantitative severity evaluation of pulmonary tuberculosis
- Author
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Jianbin Huang, Jie Lin, Yikai Xu, Tianjing Zhang, Henry C. Woodruff, Wei Ni, Jun Xu, Guangyao Wu, Jin Qi, Xiangying Li, Philippe Lambin, Chenggong Yan, Lingfeng Wang, Beeldvorming, MUMC+: DA Beeldvorming (5), Precision Medicine, RS: GROW - R2 - Basic and Translational Cancer Biology, and RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy
- Subjects
Thorax ,Adult ,medicine.medical_specialty ,Artificial intelligence ,Tuberculosis ,Detection diagnosis ,Pulmonary tuberculosis ,medicine ,Image Processing, Computer-Assisted ,Humans ,Radiology, Nuclear Medicine and imaging ,Tuberculosis, Pulmonary ,Computed tomography ,Disease burden ,Neuroradiology ,Aged ,Retrospective Studies ,medicine.diagnostic_test ,business.industry ,Interventional radiology ,Deep learning ,General Medicine ,Middle Aged ,medicine.disease ,Fully automatic ,Female ,Radiology ,business ,Tomography, X-Ray Computed - Abstract
Objectives An accurate and rapid diagnosis is crucial for the appropriate treatment of pulmonary tuberculosis (TB). This study aims to develop an artificial intelligence (AI)–based fully automated CT image analysis system for detection, diagnosis, and burden quantification of pulmonary TB. Methods From December 2007 to September 2020, 892 chest CT scans from pathogen-confirmed TB patients were retrospectively included. A deep learning–based cascading framework was connected to create a processing pipeline. For training and validation of the model, 1921 lesions were manually labeled, classified according to six categories of critical imaging features, and visually scored regarding lesion involvement as the ground truth. A “TB score” was calculated based on a network-activation map to quantitively assess the disease burden. Independent testing datasets from two additional hospitals (dataset 2, n = 99; dataset 3, n = 86) and the NIH TB Portals (n = 171) were used to externally validate the performance of the AI model. Results CT scans of 526 participants (mean age, 48.5 ± 16.5 years; 206 women) were analyzed. The lung lesion detection subsystem yielded a mean average precision of the validation cohort of 0.68. The overall classification accuracy of six pulmonary critical imaging findings indicative of TB of the independent datasets was 81.08–91.05%. A moderate to strong correlation was demonstrated between the AI model–quantified TB score and the radiologist-estimated CT score. Conclusions The proposed end-to-end AI system based on chest CT can achieve human-level diagnostic performance for early detection and optimal clinical management of patients with pulmonary TB. Key Points • Deep learning allows automatic detection, diagnosis, and evaluation of pulmonary tuberculosis. • Artificial intelligence helps clinicians to assess patients with tuberculosis. • Pulmonary tuberculosis disease activity and treatment management can be improved. Supplementary Information The online version contains supplementary material available at 10.1007/s00330-021-08365-z.
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- 2022
34. Comparison of Social Media Utilization Among Vascular Surgeons, Interventional Cardiologists, and Interventional Radiologists at Academic Training Institutions
- Author
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Sarah Y. Bessen, Zachary J. Wanken, Mark A. Eid, John B. Rode, J. Aaron Barnes, Peter B. Anderson, Philip P. Goodney, and Edward Gifford
- Subjects
Surgeons ,medicine.medical_specialty ,Interventional cardiology ,medicine.diagnostic_test ,business.industry ,MEDLINE ,Specialty ,Interventional radiology ,General Medicine ,Vascular surgery ,Influencer marketing ,Cardiologists ,Treatment Outcome ,Family medicine ,Radiologists ,medicine ,Academic Training ,Humans ,Surgery ,Social media ,Cardiology and Cardiovascular Medicine ,business ,Social Media - Abstract
INTRODUCTION Social media platforms, especially Twitter, are increasingly utilized across medical practice, education, and research. However, little is known about differences in social media use among physicians of varying specialties and its impact on recruitment of trainees. Our objective was to describe differences in social media use among vascular interventional proceduralists at academic training institutions. METHODS We identified institutions with training programs in vascular surgery (VS), interventional radiology (IR), and interventional cardiology (IC). Faculty providers were identified in each specialty at these institutions. A standardized search was used to identify non-anonymous social media profiles on Facebook, Instagram, and Twitter in September 2019. Influencers were defined as physicians with more than 1,000 Twitter followers. Follow ratio was defined as the number of followers divided by the number of accounts followed. Between-specialty differences were analyzed. RESULTS A total of 1,330 providers (n=454 VS, n=451 IR, n=425 IC) were identified across 47 institutions in 27 states. Across all physicians, a minority of providers utilize social media (Facebook: 24.9%, n=331; Instagram: 10.8%, n=143; Twitter: 18.0%, n=240). VS were significantly more likely to use Instagram (p=0.001) but there was not a significant difference in utilization of Facebook and Twitter. Among Twitter users, VS had fewer followers on average (median 178, inter-quartile range [IQR] 39-555) than IR (median 272, IQR 50-793, p=0.26) and IC (median 286, IQR 71-1257, p=0.052). IC were most likely to be influencers (30.9%, n=25) followed by IR (17.9%, n=15) and VS (10.7%, n=8, p=0.006). On average, interventional cardiologists had the highest follow ratio (mean 4.9 ± 7.1) compared to interventional radiologists (mean 3.2 ± 5.5) and vascular surgeons (mean 2.5 ± 3.3, p
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- 2022
35. Pre-Procedure Thrombocytopenia and Leukopenia Association with Risk for Infection in Image-Guided Tunneled Central Venous Catheter Placement
- Author
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Abigail Luman, Keith B. Quencer, and Claire Kaufman
- Subjects
Catheterization, Central Venous ,Catheter-Related Infections ,Central Venous Catheters ,Humans ,Radiology, Nuclear Medicine and imaging ,Leukopenia ,Thrombocytopenia ,central venous catheter ,leukopenia ,thrombocytopenia ,infection ,interventional radiology - Abstract
Placement of image-guided tunneled and non-tunneled large-bore central venous catheters (CVCs) are common procedures in interventional radiology. Although leukopenia and/or thrombocytopenia are common at the time of placement, the roles these factors may have in subsequent catheter-related infection have yet to be investigated. A single-institution retrospective review was performed in patients who underwent CVC placement in interventional radiology between 11/2018–6/2019. The electronic medical record was used to obtain demographics, procedure details, pre-placement laboratory values, and the subsequent 90-day follow-up. A total of 178 tunneled and non-tunneled CVCs met inclusion criteria during this time period. White blood cell (WBC) and platelet counts were found to be significant risk factors for subsequent infection. Administration of pre-procedure antibiotics was not found to be a significant factor for subsequent infection (p = 0.075). Leukopenia and thrombocytopenia at the time of CVC placement are both risk factors of line infection for tunneled large-bore CVCs. This should lead to the consideration of using a non-tunneled CVC when clinically feasible, or the delayed placement of these catheters until counts recover.
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- 2022
36. Interventional radiology and open surgery: An effective partnership for solid organ trauma
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Simon P. McGuirk, Evelyn Ong, and Mirana Inès Leung-Tack
- Subjects
medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Major trauma ,General surgery ,Open surgery ,Interventional radiology ,Abdominal Injuries ,General Medicine ,Radiology, Interventional ,Kidney ,Wounds, Nonpenetrating ,medicine.disease ,Injury Severity Score ,Blunt ,Trauma Centers ,Pediatrics, Perinatology and Child Health ,medicine ,Humans ,Surgery ,Case note ,Solid organ ,Child ,business ,Retrospective Studies - Abstract
Background Management algorithms of pediatric blunt abdominal solid organ injury (BASOI) are evolving to include interventional radiology, but there are few studies documenting the application and clinical outcomes of cases in children. Methods A retrospective case note review of all paediatric BASOI at a single Paediatric Major Trauma Centre was completed. CT scans and injuries have been retrospectively graded according to AAST guidelines. Results In the period February 2012 - October 2019, there were 106 children (median age 10.6 years (range 10 days – 16 years)) with BASOI. Of these, 71% (n = 75) suffered liver injuries, 29% (n = 31) spleen, and 27% (n = 29) renal. 95 children (89.6%) were treated with non-operative management, of which 15% (n = 14) went on to require secondary operative management (surgery, n=1 & interventional radiology, n= 14). There were no deaths or loss of organ in the group which required secondary operative management, regardless of the grade of injury. Conclusion The majority of BASOI can be successfully treated conservatively, but IR is a useful additional tool in their management for all grades of injury and is complementary to open surgery.
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- 2022
37. Potential Bias in Image-Guided Procedure Research: A Retrospective Analysis of Disclosed Conflicts of Interest and Open Payment Records
- Author
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Mina S. Makary, Lee J. Hsieh, Eric J. Keller, Surabhi R. Madadi, and Karen T. Shore
- Subjects
medicine.medical_specialty ,Databases, Factual ,medicine.diagnostic_test ,Conflict of Interest ,business.industry ,media_common.quotation_subject ,Conflict of interest ,MEDLINE ,Interventional radiology ,Disclosure ,Payment ,United States ,Physician payment ,Physicians ,Family medicine ,Health care ,Retrospective analysis ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Cardiology and Cardiovascular Medicine ,business ,Retrospective Studies ,media_common ,Primary research - Abstract
PURPOSE To assess the prevalence of positive conflict of interest (COI) disclosures in U.S.-based interventional radiology (IR) research as well as the level of agreement between disclosed financial relationships and open payment data for top-cited image-guided procedure research. MATERIALS AND METHODS All publications in volume 30 (2019) of the Journal of Vascular and Interventional Radiology (JVIR) were reviewed to estimate the prevalence of COI disclosures in IR research. Publications were categorized as primary research, systematic review, or other. Prevalence was then compared across JVIR publication subtype, categories, and whether they were device-focused with chi-squared tests. Additionally, the Web of Science database was searched for the top 10 cited studies of 10 common image-guided procedures with available U.S. physician payment data. Payments were categorized as historical (>1 year prior to publication) or active (
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- 2022
38. Variability in the perception and application of force used in IVC filter retrievals among interventional radiologists
- Author
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Andrew England, Usman Shaikh, Tze Y. Chan, and Richard G. McWilliams
- Subjects
medicine.medical_specialty ,Vena Cava Filters ,medicine.diagnostic_test ,Computer science ,media_common.quotation_subject ,Ivc filter ,Vena Cava, Inferior ,Interventional radiology ,Filter retrieval ,Inferior vena cava ,medicine.vein ,Filter (video) ,Perception ,Radiologists ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Medical physics ,Set (psychology) ,Device Removal ,media_common - Abstract
Introduction A long dwell time is associated with higher inferior vena cava (IVC) filter retrieval complication rates. Manufacturers advise that “excessive force should not be used” during filter retrieval; however, the term “excessive” is subjective and is likely to lead to variability amongst operators. The aims of this study were to 1) ascertain what interventional radiologists consider to be excessive force during filter retrieval and 2) to understand the variability in interventional radiologists’ perception of force. Methods The authors recruited interventional radiologists to perform a benchtop simulated filter retrieval. Participants were invited to pull on a modified force tester attached to a Gunther Tulip filter retrieval set (GTRS). The participants were asked to pull as if they were retrieving an IVC filter and stop when they felt it was clinically unsafe to apply greater force. They were then asked to replicate forces of 10N and 50N, respectively. Each of the three tasks was completed three times. Data were obtained on the clinical experience of the participants with specific questions focusing on their filter retrieval practices. Results The range of maximum forces applied during filter retrieval varied between 0.8 and 79.8N. When asked to replicate 10N and 50N, for attempt-1, the median forces produced were 23.5N and 38.1N, respectively. A trend analysis showed that those who overestimate 10N are more likely to apply a greater overall maximum force (rs = 0.622; P Conclusion There is wide variation in what interventional radiologists consider to be the maximum safe force to apply during IVC filter retrieval. Implications for practice Manufacturers and operators should consider methods in which only a safe range of forces can be applied during an IVC filter retrieval. Operators may wish to undertake ‘personal’ force calibration as part of training in interventional radiology.
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- 2022
39. Myasthenia gravis after glioblastoma resection: paraneoplastic syndrome or coincidence? A unique case report and review of the literature
- Author
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Martinus P.G. Broen, J. G. J. Hoeijmakers, Ann Hoeben, Inge Compter, Olaf E. M. G. Schijns, T. A. M. Bouwens van der Vlis, R. J. Slegers, Alida A. Postma, Linda Ackermans, and Jan Beckervordersandforth
- Subjects
medicine.medical_specialty ,Neurology ,Thymoma ,Paraneoplastic Syndromes ,Brain tumor ,Neuromuscular junction ,Malignancy ,Postoperative Complications ,Paraneoplastic neurological syndrome ,medicine ,Humans ,Myasthenia gravis ,Neuroradiology ,Aged ,EXTRATHYMIC MALIGNANCIES ,medicine.diagnostic_test ,business.industry ,Interventional radiology ,Thymus Neoplasms ,medicine.disease ,Surgery ,Neurology (clinical) ,Radiology ,Neurosurgery ,business ,Glioblastoma - Abstract
Paraneoplastic neurological syndromes (PNS) can manifest with every type of malignancy. A well-known syndrome is myasthenia gravis (MG) in combination with thymomas. No association between primary brain tumors and neuromuscular disorders has been described. Here, we present a case of a 65-year-old patient who developed MG, following an uncomplicated, gross-total resection of a glioblastoma. To our knowledge, this is the first case describing the onset of MG during the early postoperative phase after glioblastoma resection. Current criteria of PNS are insufficient when the neurological syndrome is diagnosed at the time of a malignancy or shortly thereafter and should be revisited.
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- 2022
40. Variability in personal protective equipment in cross-sectional interventional abdominal radiology practices
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Virginia Planz, Jennifer Huang, Samuel J. Galgano, Olga R. Brook, and Ghaneh Fananapazir
- Subjects
Cross-Sectional Studies ,Radiological and Ultrasound Technology ,Institutional practice ,SARS-CoV-2 ,Biopsy ,Personal protective equipment ,Urology ,Interventional Radiology ,Gastroenterology ,COVID-19 ,Humans ,Radiology, Nuclear Medicine and imaging ,Radiology, Interventional - Abstract
Purpose To determine institutional practice requirements for personal protective equipment (PPE) in cross-sectional interventional radiology (CSIR) procedures among a variety of radiology practices in the USA and Canada. Methods Members of the Society of Abdominal Radiology (SAR) CSIR Emerging Technology Commission (ETC) were sent an eight-question survey about what PPE they were required to use during common CSIR procedures: paracentesis, thoracentesis, thyroid fine needle aspiration (FNA), superficial lymph node biopsy, deep lymph node biopsy, solid organ biopsy, and ablation. Types of PPE evaluated were sterile gloves, surgical masks, gowns, surgical hats, eye shields, foot covers, and scrubs. Results 26/38 surveys were completed by respondents at 20/22 (91%) institutions. The most common PPE was sterile gloves, required by 20/20 (100%) institutions for every procedure. The second most common PPE was masks, required by 14/20 (70%) institutions for superficial and deep procedures and 12/12 (100%) institutions for ablation. Scrubs, sterile gowns, eye shields, and surgical hats were required at nearly all institutions for ablation, whereas approximately half of institutions required their use for deep lymph node and solid organ biopsy. Compared with other types of PPE, required mask and eye shield use showed the greatest increase during the SARS-CoV-2 pandemic. Conclusion PPE use during common cross-sectional procedures is widely variable. Given the environmental and financial impact and lack of consensus practice, further studies examining the appropriate level of PPE are needed. Graphical abstract
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- 2022
41. A Surgical Case of Bronchial Artery Aneurysm Connecting to a Pulmonary Artery and Vein Complicated by Racemose Hemangioma
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Naoko Isogai, Toshitaka Tsukiyama, Kenichiro Noguchi, Jun Kawachi, Ryuta Fukai, Tomoki Nishida, and Rai Shimoyama
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Bronchial Arteries ,Pulmonary Artery ,Pulmonary vein ,Aneurysm ,medicine.artery ,medicine ,Humans ,Vein ,Aged, 80 and over ,medicine.diagnostic_test ,business.industry ,Vascular malformation ,Gastroenterology ,Interventional radiology ,General Medicine ,medicine.disease ,Embolization, Therapeutic ,Stenosis ,Treatment Outcome ,medicine.anatomical_structure ,Pulmonary artery ,cardiovascular system ,Female ,Surgery ,Radiology ,Hemangioma ,Cardiology and Cardiovascular Medicine ,business ,Bronchial artery - Abstract
We report a surgical case of bronchial artery aneurysm (BAA) that directly connected to a pulmonary artery and a pulmonary vein through an abnormal vessel. It was complicated by racemose hemangioma. This is a rare vascular malformation. An 82-year-old female had a large BAA that was found incidentally. First, we consider treating the BAA with embolization by interventional radiology (IVR). However, because of strong meandering of the bronchial artery, we could not advance a microcatheter into the BAA. Therefore, a surgical operation was performed through a standard posterior lateral thoracotomy. The BAA was located between the upper and lower lobes and directly connected to the pulmonary artery. Some bronchial artery branches that provided inflow to the aneurysm were ligated, and the abnormal vessel that connected the BAA to the upper pulmonary vein was ligated easily. A fistula between the BAA and pulmonary artery was sutured by the cardiovascular surgeon using an artificial cardiopulmonary device, with permissive stenosis of A2b (ascending A2).
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- 2022
42. Deep learning-assisted prostate cancer detection on bi-parametric MRI: minimum training data size requirements and effect of prior knowledge
- Author
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Anindo Saha, Ilse Slootweg, Maarten de Rooij, Patrick Brand, Henkjan Huisman, and Matin Hosseinzadeh
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Image-Guided Biopsy ,Male ,medicine.medical_specialty ,Prostate cancer ,Deep Learning ,Prostate ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Multiparametric Magnetic Resonance Imaging ,Neuroradiology ,Retrospective Studies ,Training set ,medicine.diagnostic_test ,business.industry ,Deep learning ,Ultrasound ,Prostatic Neoplasms ,Interventional radiology ,General Medicine ,medicine.disease ,Elevated PSA ,Magnetic Resonance Imaging ,medicine.anatomical_structure ,Urological cancers Radboud Institute for Health Sciences [Radboudumc 15] ,Radiology ,Artificial intelligence ,business ,Rare cancers Radboud Institute for Health Sciences [Radboudumc 9] - Abstract
Objectives To assess Prostate Imaging Reporting and Data System (PI-RADS)–trained deep learning (DL) algorithm performance and to investigate the effect of data size and prior knowledge on the detection of clinically significant prostate cancer (csPCa) in biopsy-naïve men with a suspicion of PCa. Methods Multi-institution data included 2734 consecutive biopsy-naïve men with elevated PSA levels (≥ 3 ng/mL) that underwent multi-parametric MRI (mpMRI). mpMRI exams were prospectively reported using PI-RADS v2 by expert radiologists. A DL framework was designed and trained on center 1 data (n = 1952) to predict PI-RADS ≥ 4 (n = 1092) lesions from bi-parametric MRI (bpMRI). Experiments included varying the number of cases and the use of automatic zonal segmentation as a DL prior. Independent center 2 cases (n = 296) that included pathology outcome (systematic and MRI targeted biopsy) were used to compute performance for radiologists and DL. The performance of detecting PI-RADS 4–5 and Gleason > 6 lesions was assessed on 782 unseen cases (486 center 1, 296 center 2) using free-response ROC (FROC) and ROC analysis. Results The DL sensitivity for detecting PI-RADS ≥ 4 lesions was 87% (193/223, 95% CI: 82–91) at an average of 1 false positive (FP) per patient, and an AUC of 0.88 (95% CI: 0.84–0.91). The DL sensitivity for the detection of Gleason > 6 lesions was 85% (79/93, 95% CI: 77–83) @ 1 FP compared to 91% (85/93, 95% CI: 84–96) @ 0.3 FP for a consensus panel of expert radiologists. Data size and prior zonal knowledge significantly affected performance (4%, $$p p < 0.05 ). Conclusion PI-RADS-trained DL can accurately detect and localize Gleason > 6 lesions. DL could reach expert performance using substantially more than 2000 training cases, and DL zonal segmentation. Key Points • AI for prostate MRI analysis depends strongly on data size and prior zonal knowledge. • AI needs substantially more than 2000 training cases to achieve expert performance.
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- 2022
43. Hemorrhoid embolization: A review of current evidences
- Author
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Pooya Torkian, Arash Dooghaie Moghadam, Marc Sapoval, Reza Talaie, Jafar Golzarian, Vincent Vidal, and Farouk Tradi
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medicine.medical_specialty ,medicine.medical_treatment ,Rectum ,Hemorrhoids ,Inferior mesenteric artery ,Wound care ,medicine.artery ,Humans ,Medicine ,Radiology, Nuclear Medicine and imaging ,Embolization ,Ligation ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,business.industry ,Hemorrhoidal plexus ,Interventional radiology ,General Medicine ,medicine.disease ,Embolization, Therapeutic ,Surgery ,Treatment Outcome ,medicine.anatomical_structure ,Quality of Life ,Internal Hemorrhoid ,business - Abstract
Hemorrhoids are local vascular structure dilations in the lower rectum, associated with morbidity and reduced quality of life. Endovascular coil or particle embolization of the superior rectal arteries, known as Emborrhoid technique, is a minimally invasive, image-guided therapy that targets the hemorrhoidal plexus and reduces hemorrhage. The purpose of this review was to analyze the results of published studies to determine the efficacy, clinical outcomes, and morbidities associated with the endovascular occlusion of hemorrhoidal arteries for the treatment of internal hemorrhoids. Current evidences suggest that hemorrhoids treated by Emborrhoid technique using microcoils, embolic particles or a combination is safe with no reported serious complications. Hemorrhoid embolization can preserve the anal tone without direct anorectal trauma and maintain the hemorrhoidal tissue in place requiring minimal local wound care on an outpatient basis. However, due to the paucity of high-quality trials, further research is warranted to evaluate its long-term outcomes, compare its efficacy with other treatment modalities, and fully assess its role in the treatment of hemorrhoid.
- Published
- 2022
44. Recurrent giant simple hepatic cyst: an unusual cause of dyspnoea in an elderly man
- Author
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Nerbadyswari Deep Bag, Suprava Naik, Sudipta Mohakud, and Aishvarya Shri
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Male ,medicine.medical_specialty ,Percutaneous ,medicine.medical_treatment ,Physical examination ,Atelectasis ,Case Report ,030230 surgery ,Cystectomy ,03 medical and health sciences ,0302 clinical medicine ,Recurrence ,Medicine ,Humans ,Paracentesis ,Cyst ,Ultrasonography ,Aged, 80 and over ,medicine.diagnostic_test ,business.industry ,Cysts ,Interventional radiology ,General Medicine ,Emergency department ,medicine.disease ,Dyspnea ,Liver ,Radiology ,Hepatic Cyst ,business ,Tomography, X-Ray Computed ,030217 neurology & neurosurgery - Abstract
An 88-year-old man presented to the emergency department with exertional dyspnoea and orthopnoea. Clinical examination revealed mildly raised jugular venous pressure, increased respiratory rate, palpable non-tender hepatomegaly and reduced right basal breath sounds. Ultrasonography showed a large right simple hepatic cyst, multiple small left hepatic and renal cysts. A non-contrast CT scan revealed a large, right hepatic thin-walled cyst of volume 4.2 L, exhibiting few thin septae and tiny nodular mural calcifications. Pressure effects were elevated right haemidiaphragm, right atrial compression and adjacent atelectasis. He had a similar episode 2 years ago, treated by percutaneous needle aspiration. Giant simple hepatic cysts are rare and present when symptomatic due to pain, mass effect on adjacent organs, infection or rupture. These may unusually cause dyspnoea or orthopnoea by compressing cardiac chambers. Simple aspiration has a high recurrence rate. Percutaneous sclerosant injection, laparoscopic deroofing and cystectomy are better treatment modalities.
- Published
- 2023
45. Direct ultrasound-guided puncture of vertebral artery V2 segment during mechanical thrombectomy
- Author
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Roberto Gandini, Sofia Vidali, Fulvio Gasparrini, and Vittorio Semeraro
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0301 basic medicine ,Male ,medicine.medical_specialty ,Percutaneous ,Computed Tomography Angiography ,medicine.medical_treatment ,Vertebral artery ,Respiratory arrest ,Case Report ,Punctures ,030105 genetics & heredity ,03 medical and health sciences ,0302 clinical medicine ,medicine.artery ,Occlusion ,Basilar artery ,Vertebrobasilar Insufficiency ,Medicine ,Intubation ,Humans ,Stroke ,Vertebral Artery ,Thrombectomy ,Ultrasonography ,Aged, 80 and over ,medicine.diagnostic_test ,business.industry ,Endovascular Procedures ,Interventional radiology ,General Medicine ,medicine.disease ,Surgery ,Cerebral Angiography ,Femoral Artery ,Surgery, Computer-Assisted ,medicine.symptom ,business ,030217 neurology & neurosurgery ,Vascular Closure Devices - Abstract
An 83-year-old man experienced left upper limb uncontrolled movements preceded by intense gasping during night rest, which progressed to unconsciousness and respiratory arrest requiring intubation. He was diagnosed with acute stroke due to distal occlusion of the basilar artery and received indication for endovascular thrombectomy. Standard endovascular approach includes percutaneous puncture of the femoral or radial arteries; however, the presence of unfavourable vascular anatomies (stenotic origin and tortuosity) did not allow catheterisation of the intracranial vessels through conventional access, and based on the consistent time lapse from onset of symptoms and deterioration of the clinical condition, a direct right vertebral artery ultrasound-guided puncture was performed. After one attempt of a triaxial technique, a complete recanalisation of the basilar artery and of its distal branches was achieved. Direct percutaneous puncture of the vertebral artery represents a rescue access strategy for treatment of posterior circulation stroke when other routes are not feasible.
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- 2023
46. Fenestrated endovascular abdominal aortic aneurysm repair with concomitant horseshoe kidney
- Author
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Sylvie Bowden and Graham Roche-Nagle
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Male ,medicine.medical_specialty ,Computed Tomography Angiography ,medicine.medical_treatment ,Less invasive ,Case Report ,030204 cardiovascular system & hematology ,Prosthesis Design ,Endovascular aneurysm repair ,03 medical and health sciences ,Blood Vessel Prosthesis Implantation ,0302 clinical medicine ,Imaging, Three-Dimensional ,Renal Artery ,medicine ,Humans ,030212 general & internal medicine ,Fused Kidney ,Aged, 80 and over ,Surgical approach ,medicine.diagnostic_test ,business.industry ,Endovascular Procedures ,Horseshoe kidney ,Interventional radiology ,General Medicine ,Vascular surgery ,medicine.disease ,Abdominal aortic aneurysm ,Surgery ,Blood Vessel Prosthesis ,Concomitant ,business ,Aortic Aneurysm, Abdominal - Abstract
Horseshoe kidney, representing abnormal fusion of the inferior renal poles, is a rare anatomic anomaly posing challenges in the setting of surgical abdominal aortic aneurysm repair. Historically, open repair has been the favoured surgical approach. However, due to the location of the renal isthmus and wide-ranging variation in anomalous renal vasculature, endovascular aneurysm repair (EVAR) has emerged as a popular, less invasive alternative. We describe one of the first published cases of two-fenestration EVAR in a patient with concomitant horseshoe kidney, followed by a discussion of current trends in surgical management. With the increasing availability to customise fenestrated grafts to patients’ unique anatomy, this advanced EVAR technique may emerge as the preferred approach in certain cases.
- Published
- 2023
47. Ventriculoperitoneal shunt knotting causing bowel obstruction and necrosis in an adult patient
- Author
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Christian Rios-Vicil and Orlando De Jesus
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Adult ,Male ,medicine.medical_specialty ,Necrosis ,Case Report ,Ventriculoperitoneal Shunt ,03 medical and health sciences ,0302 clinical medicine ,Catheters, Indwelling ,stomatognathic system ,medicine ,Humans ,030212 general & internal medicine ,medicine.diagnostic_test ,business.industry ,digestive, oral, and skin physiology ,Interventional radiology ,General Medicine ,Jejunal Diseases ,medicine.disease ,digestive system diseases ,Hydrocephalus ,Surgery ,Shunt (medical) ,Bowel obstruction ,Neurosurgery ,medicine.symptom ,Presentation (obstetrics) ,Peritoneal catheter ,business ,030217 neurology & neurosurgery ,Intestinal Obstruction - Abstract
Knotting or twisting of the peritoneal catheter around a bowel segment, causing bowel obstruction and necrosis, is extremely rare. Only six cases have been reported in the literature. This report described the second case of an adult patient with spontaneous knotting of the peritoneal catheter around a small-bowel segment, causing bowel obstruction and necrosis. The presentation of a knotted ventriculoperitoneal shunt around a bowel loop is stereotypical. Treatment and general recommendations have been made to help guide clinicians when encountering such cases. Evidence of small-bowel obstruction in a twisted, coiled or knotted peritoneal catheter may need surgical intervention. In the setting of progressive abdominal manifestations, knotting of the peritoneal catheter around bowel loops may cause bowel obstruction and may present with acute life-threatening manifestations. Efficient and expedite diagnosis should be made to coordinate multispecialty intervention and follow-up appropriately.
- Published
- 2023
48. Applicability of contemporary quality indicators in vestibular surgery—do they accurately measure tumor inherent postoperative complications of vestibular schwannomas?
- Author
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Walter Stummer, Sebastian Lohmann, Stephanie Schipmann, Eric Suero Molina, Özer Altan Toksöz, Michael Schwake, and Bilal Al Barim
- Subjects
Leak ,medicine.medical_specialty ,Neurology ,Hearing loss ,Facial Paralysis ,Schwannoma ,Neurosurgical Procedures ,Postoperative Complications ,Hearing ,medicine ,Humans ,Quality Indicators, Health Care ,Retrospective Studies ,Neuroradiology ,Vestibular system ,medicine.diagnostic_test ,business.industry ,Interventional radiology ,Neuroma, Acoustic ,Prognosis ,medicine.disease ,Surgery ,Treatment Outcome ,Neurology (clinical) ,Neurosurgery ,medicine.symptom ,business - Abstract
Background Due to rising costs in health care delivery, reimbursement decisions have progressively been based on quality measures. Such quality indicators have been developed for neurosurgical procedures, collectively. We aimed to evaluate their applicability in patients that underwent surgery for vestibular schwannoma and to identify potential new disease-specific quality indicators. Methods One hundred and three patients operated due to vestibular schwannoma were subject to analysis. The primary outcomes of interest were 30-day and 90-day reoperation, readmission, mortality, nosocomial infection and surgical site infection (SSI) rates, postoperative cerebral spinal fluid (CSF) leak, facial, and hearing function. The secondary aim was the identification of prognostic factors for the mentioned primary outcomes. Results Thirty-day (90-days) outcomes in terms of reoperation were 10.7% (14.6%), readmission 9.7% (13.6%), mortality 1% (1%), nosocomial infection 5.8%, and SSI 1% (1%). A 30- versus 90-day outcome in terms of CSF leak were 6.8% vs. 10.7%, new facial nerve palsy 16.5% vs. 6.1%. Hearing impairment from serviceable to non-serviceable hearing was 6.8% at both 30- and 90-day outcome. The degree of tumor extension has a significant impact on reoperation (p p = 0.015), postoperative hemorrhage (p p = 0.026). Conclusions Our data demonstrate the importance of entity-specific quality measurements being applied even after 30 days. We identified the occurrence of a CSF leak within 90 days postoperatively, new persistent facial nerve palsy still present 90 days postoperatively, and persisting postoperative hearing impairment to non-serviceable hearing as potential new quality measurement variables for patients undergoing surgery for vestibular schwannoma.
- Published
- 2021
49. CT-Guided Percutaneous Vertebroplasty of the Cervico-Thoracic Junction for the Management of Pathologic Fracture or Symptomatic Lytic Lesion in Cancer Patients
- Author
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Celine Laouisset, Jonathan Dbjay, Jeremy Smadja, Carole Bouleuc, Hervé Brisse, Benjamin Moulin, Vincent Servois, Guillaume Dutertre, Laura Thery, Timothée Marchal, and Alexis Burnod
- Subjects
medicine.medical_specialty ,Pathologic fracture ,medicine.medical_treatment ,Asymptomatic ,Percutaneous vertebroplasty ,Lesion ,Neoplasms ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Retrospective Studies ,Vertebroplasty ,medicine.diagnostic_test ,business.industry ,Bone Cements ,Cancer ,Interventional radiology ,Retrospective cohort study ,medicine.disease ,Vertebra ,Surgery ,Fractures, Spontaneous ,Treatment Outcome ,medicine.anatomical_structure ,Spinal Fractures ,medicine.symptom ,Tomography, X-Ray Computed ,Cardiology and Cardiovascular Medicine ,business - Abstract
OBJECTIVES The purpose of this retrospective observational study is to report author's experience in computed-tomography (CT)-guided percutaneous vertebroplasty (PV) of the cervicothoracic junction. METHODS The records of all consecutive patients treated by PV at levels C7, T1, T2, and T3 in a tertiary cancer center during year 2020 were extracted from the Institutional electronic archive. Following data were collected: demographics, indication for PV, procedure features, outcomes, and complications. Technical success was defined as when the trocar was placed into the vertebral body, allowing the injection of polymethyl-metacrylate (PMMA). RESULTS Eleven patients were identified who received PV on 14 levels. Mean procedure duration was 57 ± 22 min (range [31-142]). A "trans-pedicular approach at the targeted level" was used in 1 vertebra (7%), a "costotransverse approach, at the targeted level" was used in 1 vertebra (7%), a "transpedicular approach via the level below" was used in 3 vertebrae (22%), and a "costotransverse approach via the level below" was used in 9 vertebrae (64%). Meantime to deploy each trocar was 20 ± 5 min (range [12-32]). Technical success was achieved in 14/14 (100%) of vertebrae. Mean postoperative hospitalization duration was 1.9 ± 1.7 days (range [1-11]). According to CIRSE classification, no adverse event occurred. PMMA leakage occurred in two patients; both remained asymptomatic. CONCLUSION This study provides arguments in favor of safety and efficiency of CT-guided vertebroplasty of levels C7, T1, T2, and T3, for both trocar deployment and monitoring of the vertebral body filling during the PMMA injection.
- Published
- 2021
50. The emergency department evaluation and management of massive hemoptysis
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Brit Long, Elliot D. Backer, Matthew A. Roginski, Colman J. Hatton, Skyler Lentz, and Patricia Ruth A. Atchinson
- Subjects
Diagnostic Imaging ,Hemoptysis ,medicine.medical_specialty ,Resuscitation ,medicine.diagnostic_test ,business.industry ,medicine.medical_treatment ,Interventional radiology ,General Medicine ,Emergency department ,medicine.artery ,Emergency Medicine ,Humans ,Medicine ,Intubation ,Airway management ,Embolization ,Emergency Service, Hospital ,business ,Airway ,Bronchial artery ,Intensive care medicine - Abstract
Introduction Massive hemoptysis is a life-threatening emergency that requires rapid evaluation and management. Recognition of this deadly condition, knowledge of the initial resuscitation and diagnostic evaluation, and communication with consultants capable of definitive management are key to successful treatment. Objective The objective of this narrative review is to provide an evidence-based review on the management of massive hemoptysis for the emergency clinician. Discussion Rapid diagnosis and management of life-threatening hemoptysis is key to patient survival. The majority of cases arise from the bronchial arterial system, which is under systemic blood pressure. Initial management includes patient and airway stabilization, reversal of coagulopathy, and identification of the source of bleeding using computed tomography angiogram. Bronchial artery embolization with interventional radiology has become the mainstay of treatment; however, unstable patients may require advanced bronchoscopic procedures to treat or temporize while additional information and treatment can be directed at the underlying pathology. Conclusion Massive hemoptysis is a life-threatening condition that emergency clinicians must be prepared to manage. Emergency clinicians should focus their management on immediate resuscitation, airway preservation often including intubation and isolation of the non-bleeding lung, and coordination of definitive management with available consultants including interventional radiology, interventional pulmonology, and thoracic surgery.
- Published
- 2021
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