Search

BACKGROUND Accumulation of macrocyclic gadolinium agents in children's brains remain to be determined. PURPOSE To demonstrate whether there is an intracranial macrocyclic gadolinium deposition after multiple contrast-enhanced MRI with gadoterate meglumine in a pediatric population. STUDY TYPE Retrospective case-control. POPULATION In all, 45 children (age range: 5-17 years; mean, 13.7 ± 3.4 years) for the study group and 45 healthy children (age range: 5-17 years; mean, 13.7 ± 3.4 years) for the control group. FIELD STRENGTH/SEQUENCE T1 - and T2 -weighted axial images on a 1.5T scanner. ASSESSMENT Children with at least three enhanced brain MRIs and an age- and sex-matched control group with an unenhanced brain MRIs were compared in terms of T1 signal intensity (SI). All patients in the study group received gadoterate meglumine intravenously (0.1 mmol/kg). SI measurements were made by drawing six regions of interest (ROIs): dentate nuclei (DN), pons, globus pallidi (GP), frontal white matter (FWM), thalamus (T), clivus, and cerebrospinal fluid (CSF) for both groups on unenhanced T1 -weighted images. STATISTICAL TESTS Student's t-test was used for comparison of SI. The Pearson correlation was calculated for the correlation between the SI and the number of gadolinium administrations. RESULTS A significant difference was detected between two groups for DN/CSF, pons/CSF, GP/CSF, thalamus/CSF, and FWM/CSF (P

Background Magnetic resonance myelography (MRM) with three-dimensional (3D) T2-weighted (T2W) turbo spin echo (TSE) sampling perfection with application-optimized contrasts using different flip angle evolution (SPACE) may be a guide to the etiology of low back pain. Purpose To research the efficiency of a 3D T2W TSE SPACE MRM sequence for visualization of anatomic details of spinal nerve root at the spinal canal and lateral recess levels in the patients with low back pain. Material and Methods Lumbar spinal MRM 3D T2W TSE SPACE was performed in a total of 70 patients (median age 46 years). Patients were imaged while lying in a supine position with straightened legs. According to the degree of facet arthropathy findings, patients were divided into four separate subgroups in our retrospective cross-sectional study. Spinal nerve root angle was measured within the spinal canal and at lateral recess level, and facet joint angle and lumbar lordosis measurements were measured by two radiologists, independently. Results Lumbar level was strongly negatively correlated with facet joint angle (r = −0.95) as well as nerve root angle within the spinal canal (NRASC) (r = –0.857) and at the lateral recess level (NRALR) (r = −0.947). Intracanal decline of the spinal root angle caused by spinal stenosis findings was also observed ( P SC and NRALR, inter-observer correlation was 0.85 and 0.82 for the spinal canal and at lateral recess level, respectively. Conclusion 3D T2W SPACE in NRASC and NRALR provided high resolution images for evaluation. Therefore, this method may be a qualitative guide for the clinician and the surgeon in terms of root anatomy before any intervention.

Aim:To investigate the role of non-contrast magnetic resonance imaging (MRI) and findings of quantitative MRI in the evaluation of pancreatic lipomatosis in patients undergoing bariatric surgery.Methods:Pre-operative and post-operative MRI findings and laboratory test results of 44 obese patients, who underwent sleeve gastrectomy, were reviewed retrospectively. Liver craniocaudal length, hepatic and pancreatic region of interest (ROI) ratios at in-phase and out-of phase sequences (in-phase/out-of phase), pancreas/spleen ROI ratio on T2-weighted sequence (T2 ratio) and thickness of subcutaneous fat were estimated. The relationship between pre-operative and postoperative findings was analyzed.Results:A total of 44 (41 female, three male) patients with a mean age of 42 were included in the study. Liver length, hepatic and pancreatic in-phase/out-of phase ratios, pancreas/spleen T2 ratio and thickness of subcutaneous fat in the post-operative period were found to be lower than those in the pre-operative period (p

Objective: To evaluate T2-weighted BLADE tecnique for evaluating intra-abdominal organs and lesions, especially the gastrointestinal wall and pathologies, and to compare the findings with HASTE. Material and Methods:Sixty patients (mean age: 47.2 years, range 19-88) (32 males, 28 females) referred to our institution for upper abdominal Magnetic Resonance Imaging (MRI) examinations with various indications between January 2015 and May 2015 were included in our study. All examinations were performed on a 1.5 Tesla MR device and no anti-peristaltic drug was administered. Images were retrospectively and independently evaluated by two radiologists. A qualitative evaluation was performed to assess images regarding the presence of artifacts and diagnostic quality, the anatomical detail of the upper abdominal organs and structures (contour sharpness, contrast of tissue, parenchyma and internal wall structure) and any present pathologies and lesions in the organs (lesion contour sharpness and size, internal structure properties, morphological characteristics). A quantitative evaluation was performed to calculate the contrast-to-muscle ratios (CMR) of the internal organs and lesions. The distribution of the variables was statistically checked by Kolmogorov Smirnov test. Paired-samples t- test was used for quantitative data. Results:BLADE was significantly associated with reduced artifacts (p Conclusion:In upper abdominal MRI examination, artifacts, especially movement artifacts, were significantly reduced by BLADE, yielding more valuable data for the evaluation of the gastrointestinal system wall structure and its pathologies, especially considering the organs near to the diaphragm and retroperitoneal organs as well as vascular structures.

SUMMARY OBJECTIVE: The aim of this study is to evaluate the myocardium structure in patients with chest pain who were determined to have moderate and/or high risk for cardiac ischemic heart disease (IHD) but who had normal findings on conventional coronary angiography by using native cardiac magnetic resonance imaging (CMRI) T1 mapping and comparing with healthy volunteers. METHODS: A total of 50 patients and 30 healthy volunteers who underwent CMRI were included in our prospective study. Patients whose clinical findings were compatible with stable angina pectoris, with moderate and/or high risk for IHD, but whose conventional coronary angiography was normal, were our patient group. Native T1 values were measured for 17 myocardial segments (segmented based on American Heart Association recommendations) by two radiologists independently. The data obtained were statistically compared with the sample t-test. RESULTS: Myocardial native T1 values were found to be significantly prolonged in the patient group compared with the control group (p

The purpose of this study was to describe the magnetic resonance imaging (MRI) findings including diffusion-weighted MRI of nonfunctional pancreatic neuroendocrine tumors (PanNETs) and their hepatic metastases, and investigate the relationships between MRI features and histopathological findings for each grade of PanNETs.A total of 30 patients were included. There were 14 men and 16 women with a mean age of 61.60±11 (SD) years (range: 31-81years). PanNET lesions were analyzed qualitatively (signal intensities, contrast enhancement, lesion margins, presence of metastasis and characteristics of metastases) and quantitatively (signal intensity ratios, contrast enhancement indices and normalized apparent diffusion coefficient [ADC]). The relationships between MRI findings and histopathological findings were evaluated.Among 30 nonfunctional PanNETs, 11 were high-grade tumors, 10 were intermediate and 9 were low-grade tumors. All high grade PanNETs showed low to intermediate signal on T2-weighted images and ill-defined borders. All intermediate grade PanNETs had intermediate and 6 low grade PanNETs have high signal on T2-weighted images. Patients with hepatic metastases from high grade PanNETs had cystic component in 8/10 (80%) and wash-out in 7/10 (70%) whereas intermediate grade PanNETs had none (P0.05). The normalized ADC values of high grade PanNETs was lower than those of intermediate and low grade PanNETs (P0.05).The presence of cystic component or contrast wash-out in hepatic metastases correlates with high grade PanNETs. The pre-operative MRI combined with DWI has an important role in grading and surgical planning of PanNETs.

Seminomas are the most common testicular tumors But frequency of bilateral testicular seminomas is about Seminomas can spread and metastasize in a very short time because of short doubling time For this reason early diagnosis and management is essential The tendency of multicentricity and bilateral location in lymphoma is higher than seminoma The first line treatment of testicular lymphoma is chemotherapy So management is different in lymphoma and seminoma The accurate preoperative diagnosis is important We report a case of a year old man with bilateral multicentric testicular lesions who had not yet fathered a child and had malignant findings on magnetic resonance imaging MRI and diffusion weighted imaging DWI After surgery histological examination revealed bilateral multicentric testicular seminomas This case underlines the role of MRI and DWI in the management of patient nbsp

The relationship of patellofemoral congruency with chondromalacia patellae (CP) was retrospectively evaluated. Lateral patellar tilt angle (LPTA), sulcus angle (SA), trochlear depth (TD), and patella angle (PA) were measured at 301 knee magnetic resonance images and compared between groups with and without CP. In the CP group, LPTA and TD were significantly low (P.01), SA was high (P.01), while PA showed no difference (P.05). The parameters were also compared between groups with mild and severe CP, and no significant difference was found (P.05). Our results demonstrate that patellar tilt and trochlear dysplasia are related to the presence but not the degree of CP.

Ovotesticular disorder of sex development (DSD) is a very rare chromosomal anomaly characterized by the presence of both ovarian and testicular tissues. We reported a case of delayed diagnosis in a 18-year-old man presenting with nonpalpable testes. Pre-operative magnetic resonance imaging (MRI) demonstrated associated anomalies (agenesis of seminal vesicle, configuration of urethra) and Mullerian duct remnants. The presence and location of both ovary and testis, and restricted diffusions of gonads were detected on MRI. On histopathology, malignancies were found in both gonads. Pre-operative MRI findings were helpful for surgical approach. We emphasized the importance of pre-operative MRI on treatment planning.