16 results on '"Auer, Jonas"'
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2. Tunneled hemodialysis catheter insertion: Above, within, or below the right atrium—Where is the tip?
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Auer, Jonas, primary, Braun, Joachim, additional, Lenk, Julian, additional, Gollrad, Johannes, additional, Ro, Sa-Ra, additional, Hamm, Bernd, additional, and de Bucourt, Maximilian, additional
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- 2022
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3. Urea‐based recirculation validation of the symmetrical palindrome catheter
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Jonczyk, Martin, Althoff, Christian, Slowinski, Torsten, Lieker, Ina, Naik, Marcel, Auer, Jonas, Marcos, Raúl García, Duka, Ejona, Hamm, Bernd, and de Bucourt, Maximilian
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- 2017
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4. Robust Object Localization under Fragmented Occlusion
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Auer, Jonas
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Objektlokalisierung ,Deep Learing ,fragmented occlusion ,R��umlich-zeitliche Netzwerke ,deep learning ,neural networks ,Fragmentierte Verdeckung ,object localization ,spatio-temporal networks ,Neuronale Netze - Abstract
Die Herausforderung der Objektdetektion stellt einen wesentlichen Baustein in vielen Anwendungsbereichen wie z.B. autonomes Fahren, Robotik und ��berwachung dar. Aus diesem Grund hat das Thema in letzter Zeit durch umfangreiche Forschung rasante Verbesserungen erfahren. Aktuelle Objektdetektoren basieren meist auf neuronalen Netzen und ��bertreffen konkurrierende L��sungen bei weitem. Trotz der bemerkenswerten Verbesserungen durch Deep Learning steht die Objektdetektion weiterhin vor gro��en Herausforderungen. Ein Problem besteht darin, dass die Zielobjekte oft verdeckt sind, wodurch r��umliche Information verloren geht und die Merkmalsextraktion dadurch gest��rt wird. Hierbei tritt Verdeckung sowohl in urbanen (z.B. durch H��user, Fahrzeuge und Stra��enschilder) als auch in l��ndlichen (z.B. durch B��ume und Str��ucher) Umgebungen gleicherma��en auf. Aus diesem Grund erforschen wir eine robuste Objektdetektion unter Verdeckung, mit besonderem Fokus auf fragmentierte Verdeckung. Wir basieren unsere L��sung auf r��umlich-zeitlichen Netzwerken und beschr��nken uns auf das Problem der Personenlokalisierung. Wir behaupten, dass der r��umliche Informationsverlust zum Zeitpunkt t0 durch die Aggregation der Komplement��r-Information zu den benachbarten Zeitpunkten t���n + ... + tn kompensiert werden kann. Wir st��tzen unsere Hypothese mit Experimenten basierend auf synthetischen Daten, welche die Grundlage f��r unsere L��sung bilden. Zus��tzlich schlagen wir eine Methode zur Reduktion der r��umlichen Information vor, welche die Netzwerke dazu bringt, r��umlich-zeitliche Daten st��rker zu ber��cksichtigen, indem zeitlich angrenzende Informationsbruchst��cke akkumuliert werden. Da es derzeit einen Mangel an Daten gibt, erstellen und annotieren wir einen neuartigen Datensatz, der sich auf fragmentierte Verdeckung konzentriert. Die Auswertung auf den annotierten Sequenzen zeigt eine erh��hte Genauigkeit (0.955 F1) im Vergleich zum Stand der Technik., The task of object detection represents an essential building block in many application areas like autonomous driving, robotics and surveillance. Therefore, the topic has recently experienced rapid improvements through significant amount of research. Current object detectors are mostly based on neural networks, outperforming competing solutions by a wide margin. Despite the notable improvements with deep learning, object detection still faces major challenges. One issue originates from target objects being occluded, causing spatial information loss and therefore disrupting feature extraction. Here, occlusion occurs equally in urban (e.g. through houses, vehicles and street signs) and rural (e.g. through trees and shrubs) environments. To address this problem, we explore robust object detection under occlusion, with the special focus on fragmented occlusion. We base our solution on spatio-temporal networks and limit ourselves to person localization. We argue that the spatial information loss at time t0 can be compensated by aggregating the complementary information at the neighbouring time frames t���n + ... + tn. We support our hypothesis with experiments based on synthetic data, which build the foundation of our final solution. Additionally we propose a method to reduce spatial information, which forces the networks to consider spatio-temporal data more heavily, by accumulating temporal adjacent information-fractals. As there is currently a lack of data, we create and annotate a novel dataset focusing on fragmented occlusion. Evaluation on the annotated sequences shows increased performance (0.955 F1) compared to the state of the art.
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- 2022
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5. PETS2021: Through-foliage detection and tracking challenge and evaluation
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Patino, Luis, primary, Boyle, Jonathan, additional, Ferryman, James, additional, Auer, Jonas, additional, Pegoraro, Julian, additional, Pflugfelder, Roman, additional, Cokbas, Mertcan, additional, Konrad, Janusz, additional, Ishwar, Prakash, additional, Slavic, Giulia, additional, Marcenaro, Lucio, additional, Jiang, Yifan, additional, Jin, Youngsaeng, additional, Ko, Hanseok, additional, Zhao, Guangliang, additional, Ben-Yosef, Guy, additional, and Qiu, Jianwei, additional
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- 2021
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6. Person Localisation under Fragmented Occlusion
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Pflugfelder, Roman, primary and Auer, Jonas, additional
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- 2021
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7. Sportverletzungen durch Indoor-Bouldern
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Auer, Jonas
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610 Medizin und Gesundheit - Published
- 2021
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8. Sports injuries caused by indoor bouldering
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Auer, Jonas
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Bouldern ,Sporttraumatologie ,Sportverletzung ,ddc:610 ,Sporthalle - Abstract
Bouldern ist eine noch relativ junge Trendsportart aus der Familie des Klettersports, die in den letzten Jahren starken Zuwachs gewonnen hat. Es gibt bisher wenig Literatur zu Verletzungen durch Bouldern generell und insbesondere zu Indoor-Bouldern. Das Ziel dieser Studie war Daten zu Verletzungshäufigkeit, -schwere und -lokalisation durch Indoor-Bouldern zu erheben sowie den Einfluss von potenziell das Verletzungsrisiko modulierenden Faktoren zu untersuchen. Mittels eines Online-Fragebogens wurden Boulderer retrospektiv zu anthropometrischen Daten, potenziell risikomodulierendem Verhalten sowie Verletzungen in der Vergangenheit befragt. Anschließend wurde monatlich prospektiv über ein Jahr das Auftreten neuer Verletzungen erhoben. Zusätzlich wurden Patienten der Notaufnahme und Klettersprechstunde mit Verletzungen durch Indoor-Bouldern zu Diagnose, Unfallhergang sowie potenziell risikomodulierendem Verhalten befragt. Knapp 60% aller Probanden hatten in der Vergangenheit bereits mindestens eine Verletzung erlitten, 44% eine Verletzung, die eine ärztliche Konsultation erforderte. Während der prospektiv beobachteten 12 Monate trat bei 44% der Probanden mindestens eine Verletzung durch Indoor-Bouldern auf, davon 78% im UIAA Schweregrad 1, 19% im Schweregrad 2 und 3% im Schweregrad 3. Die obere Extremität war von 63% aller Verletzungen betroffen, die untere Extremität von 23%. Verletzungen der unteren Extremität waren häufiger im UIAA Schweregrad ≥ 2 klassifiziert (p = 0,007). Probanden, die Bouldern erst seit maximal einem Jahr betrieben, hatten ein erhöhtes Risiko für Verletzungen der unteren Extremität (p = 0,027). Keine der untersuchten protektiven Maßnahmen inklusive Spotten konnten das Verletzungsrisiko senken. Das Nutzen von Kletterschuhen mit starkem Downturn und Vorspann erhöhte das Risiko für Verletzungen im UIAA Schweregrad ≥ 2 (p = 0,003). Verletzungen der Patienten aus Notaufnahme und Klettersprechstunde waren in 5,1% im UIAA Schweregrad 1, 48,7% im Schweregrad 2 und 46,2% im Schweregrad 3. Verletzungen der unteren Extremität waren häufiger im Schweregrad 3 (p = 0,015). Verletzungen durch Indoor Bouldern sind häufig, der Großteil erfordert jedoch keine medizinische Behandlung. Verletzungen der unteren Extremität sind gehäuft in einem höheren Schweregrad. Die untersuchten Präventivmaßnahmen senkten das Verletzungsrisiko nicht. Einsteigerkurse sollten insbesondere sicheres Abspringen und Stürzen trainieren. Das Nutzen eines weiteren Paares Kletterschuhe ohne starken Downturn und Vorspann für das Training scheint ratsam. Zukünftige Forschung sollte sich der Verletzungsprävention insbesondere durch Stürzen und Abspringen widmen., Bouldering is a relatively young trend sport from the family of climbing sports, which has become very popular in recent years. There is little literature on injuries caused by bouldering in general and indoor bouldering in particular. The aim of this study was to collect data on injury frequency, severity, and localization of injuries caused by indoor bouldering and to investigate the influence of risk modulating factors. Using an online questionnaire, boulderers were retrospectively surveyed about anthropometric data, potential risk modulating behavior, and past injuries. The incidence of new injuries was assessed on a monthly basis over one year. In addition, patients in the emergency department and climbing consultations with injuries caused by indoor bouldering were asked about diagnosis, accident history, and potential risk-modulating behavior. Nearly 60% of all subjects had at least one previous injury, 44% an injury that required medical consultation. During the prospectively observed 12 months, 44% of subjects experienced at least one indoor bouldering injury, of which 78% were UIAA severity 1, 19% severity 2, and 3% severity 3. The upper extremity was affected by 63% of all injuries, and the lower extremity by 23%. Injuries of the lower extremity were more often classified UIAA severity ≥ 2 (p = 0.007). Subjects who had only been bouldering for one year or less had an increased risk for lower extremity injuries (p = 0.027). None of the investigated protective measures including spotting were able to reduce the risk of injury. The use of climbing shoes with strong downturn increased the risk of injuries ≥ UIAA severity 2 (p = 0.003). 5,1% of injuries of patients from the emergency department and climbing consultations were UIAA severity 1, 48.7% severity 2, and 46.2% severity 3. Injuries to the lower extremity were more often severity 3 (p = 0.015). Injuries from indoor bouldering are common, but the majority do not require medical treatment. Injuries of the lower extremity are of a higher severity. The preventive measures investigated did not reduce the risk of injury. Beginners' courses should especially train safe jumping off and fall training. The use of a second pair of climbing shoes without strong downturn for training seems advisable. Future research should investigate methods to prevent injury, especially from falls and jumps.
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- 2021
9. Baseline characteristics, diagnostic efficacy, and peri-examinational safety of IV gadoteric acid MRI in 148,489 patients
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Braun, Joachim, primary, Busse, Reinhard, additional, Darmon-Kern, Elisabeth, additional, Heine, Oliver, additional, Auer, Jonas, additional, Meyl, Tobias, additional, Maurer, Martin, additional, Hamm, Bernd, additional, and de Bucourt, Maximilian, additional
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- 2019
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10. Baseline characteristics, diagnostic efficacy, and peri-examinational safety of IV gadoteric acid MRI in 148,489 patients.
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Braun, Joachim, Busse, Reinhard, Darmon-Kern, Elisabeth, Heine, Oliver, Auer, Jonas, Meyl, Tobias, Maurer, Martin, Hamm, Bernd, and de Bucourt, Maximilian
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MAGNETIC resonance imaging ,ASTHMA - Abstract
Background: Magnetic resonance imaging (MRI) examinations with intravenous (IV) contrast are performed worldwide in routine daily practice. In order to detect and enumerate even rare adverse events (AE) and serious adverse events (SAE), and to relate them with patients' baseline characteristics and diagnostic effectiveness, high quantity sample size is necessary.Purpose: To assess safety, diagnostic effectiveness, and baseline characteristics of patients undergoing IV gadoteric acid (Dotarem®) MRI in routine practice.Material and Methods: Data from two observational post-marketing surveillance (PMS) databases compiled by 139 and 52 German centers in 2004-2011 and 2011-2013, respectively, were pooled, yielding data on a total of 148,489 patients examined over a 10-year period. Radiologists used a standardized questionnaire to report data including patient demographics, characteristics of MR examinations, and results in terms of diagnosis and patient safety.Results: Overall, 712 AEs were reported in 467 (0.3%) patients, mainly nausea (n = 224, 0.2%), vomiting (n = 29, <0.1%), urticaria (n = 20, <0.1%), and feeling hot (n = 13, <0.1%). AEs were considered related to gadoteric acid in 362 (0.2%) patients. Higher frequencies of AEs were observed among patients with a previous reaction to a contrast agent (2.0%), liver dysfunction (0.7%), bronchial asthma (0.7%), and a history of allergies (0.6%). There were 49 SAEs in 18 (<0.1%) patients, including two children. No fatal SAE was reported. Examinations were diagnostic in 99.8% of all patients, and image quality was excellent or good in 97.7% of the patients.Conclusion: Gadoteric acid is a safe peri-examinational and effective contrast agent for MRI in routine practice. [ABSTRACT FROM AUTHOR]- Published
- 2020
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11. Development of Report Turnaround Times in a University Department of Radiology during Implementation of a Reformed Curriculum for Undergraduate Medical Education
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Albrecht, Liane, additional, Maurer, Martin, additional, Seithe, Tim, additional, Braun, Joachim, additional, Gummert, Richard, additional, Auer, Jonas, additional, Sponheuer, Keno, additional, Meyl, Tobias, additional, Hamm, Bernd, additional, and de Bucourt, Maximilian, additional
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- 2017
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12. Design and validation of a clinical scale for prehospital stroke recognition, severity grading and prediction of large vessel occlusion: the shortened NIH Stroke Scale for emergency medical services
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Purrucker, Jan Christoph, primary, Härtig, Florian, additional, Richter, Hardy, additional, Engelbrecht, Andreas, additional, Hartmann, Johannes, additional, Auer, Jonas, additional, Hametner, Christian, additional, Popp, Erik, additional, Ringleb, Peter Arthur, additional, Nagel, Simon, additional, and Poli, Sven, additional
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- 2017
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13. Diagnostic efficacy and safety of gadoteric acid MR mammography in 1537 patients
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Seithe, Tim, primary, Braun, Joachim, additional, Wolf, Michael, additional, Vahldiek, Janis, additional, Wolny, Dajana, additional, Auer, Jonas, additional, Pociej, Joanna, additional, Heine, Oliver, additional, Hamm, Bernd, additional, and de Bucourt, Maximilian, additional
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- 2016
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14. Development of Report Turnaround Times in a University Department of Radiology during Implementation of a Reformed Curriculum for Undergraduate Medical Education.
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Albrecht, Liane, Maurer, Martin H., Seithe, Tim, Braun, Joachim, Gummert, Richard, Auer, Jonas, Sponheuer, Keno, Meyl, Tobias Philipp, Hamm, Bernd, and de Bucourt, Maximilian
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- 2018
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15. Urea-based recirculation validation of the symmetrical palindrome catheter.
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Althoff, Christian, Auer, Jonas, Hamm, Bernd, de Bucourt, Maximilian, Jonczyk, Martin, Slowinski, Torsten, Lieker, Ina, Naik, Marcel, Marcos, Raúl García, and Duka, Ejona
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BLOOD circulation ,CATHETERS ,HEMODIALYSIS ,MATHEMATICS ,UREA ,PRODUCT design ,EVALUATION research ,MEDICAL equipment reliability ,DESCRIPTIVE statistics - Abstract
SUMMARY Background High blood flow and low recirculation rates are central for adequate haemodialysis. A new symmetrical tip has been invented promising efficient haemodialysis even if the ports are reversed. Objective To evaluate access recirculation of the 'palindrome' catheter and to report initial experiences in a clinical setting. Material and methods After implantation of the new catheter in 20 patients (male: 14; female: 6; mean age 72 ± 12.2), access recirculation was evaluated using the urea-based recirculation test. After 30 minutes of haemodialysis, ultrafiltration was stopped and arterial and venous samples were taken. Afterwards, the blood flow rate was reduced to 120 ml/min. Another systemic arterial blood sample was taken 10 seconds after the blood pump was switched off. Results All 20 interventions were performed successfully without complications. The average recirculation rate was 8.1% with a median of 2.5% ranging from 0 to 85.8%. Recirculation rates under 5% were measured in 13 patients and more than 10% recirculation were found in two patients. The median of days between catheter implantation and recirculation assessment was the day following implantation. Conclusion The new symmetrical catheter presented low recirculation rates in a clinical setting. Since there is just a single tip, fluoroscopic placement in the right atrium is facilitated. [ABSTRACT FROM AUTHOR]
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- 2017
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16. Development of Report Turnaround Times in a University Department of Radiology during Implementation of a Reformed Curriculum for Undergraduate Medical Education.
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Albrecht L, Maurer MH, Seithe T, Braun J, Gummert R, Auer J, Sponheuer K, Meyl TP, Hamm B, and de Bucourt M
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- Absenteeism, Humans, Intensive Care Units, Models, Educational, Retrospective Studies, Work Schedule Tolerance, Education, Medical, Undergraduate organization & administration, Efficiency, Organizational, Hospitals, University, Problem-Based Learning organization & administration, Radiology Department, Hospital organization & administration, Radiology Information Systems organization & administration, Workload
- Abstract
Purpose: The implementation of a reformed curriculum for undergraduate medical education with a problem-oriented focus and more bedside teaching in small groups increases the academic teaching workload. The aim of this study was to investigate whether this increase in teaching duties is associated with an increase in report turnaround times of radiologists or increased unplanned absence during term times compared with term breaks (lecture-free periods) and over the whole period under investigation., Materials and Methods: The database of all radiological examinations performed at a large German university hospital was retrospectively analyzed for a two-year period from the winter term 2011/12 to the summer term 2013. A total of 192 984 radiological examinations performed during this period were included in an analysis of reporting times (i. e., time from end of examination to completion of report) during term times versus term breaks. Reporting times were analyzed for all radiological examinations and for intensive care unit (ICU) patients. In addition, radiologists' schedules were analyzed in terms of teaching duties, unplanned absence, vacation days, and days away from work for education and training., Results: During the period under investigation, the teaching load increased from overall 1.75 hours/day in the winter term 2011/12 to 6.49 hours/day in the summer term 2013 and in the term break from overall 0.10 hours/day in the winter term 2011/12 to 0.71 hours/day in the summer term 2013. Reporting time increased during this period (p < 0.05) but remained shorter during term times than during term breaks. The difference between term and term break for ICU patients was not significant. There was no increase in unplanned absences during term times., Conclusion: Overall, radiologists' reporting times increased during the period when the reformed curriculum for undergraduate medical education was implemented. As this was observed both during term and during term breaks, increased teaching duties alone cannot serve as a sole causal explanation., Key Points: · Digital high-quantitative parameters can be used to evaluate workflow in radiology.. · Reporting time can be a criterion for efficient staffing.. · The acquisition and evaluation of parameters such as reporting times could lead to a more efficient resource allocation by providing hints of changed framework conditions and changing working intensities and/or capicity reserves - which may not be immediately apparent.. · During the period under investigation with the implementation of a teaching-intensive reformed curriculum for undergraduate medical education there was an increase in reporting time, which was not significant in intense care units.. · Since during the period under investigation the increase in reporting times can be stated both during term time and in the lecture free period, the implementation of the reformed curriculum for undergraduate medical education alone cannot serve as a sole causal explanation.., Citation Format: · Albrecht L, Maurer MH, Seithe T et al. Development of the Report Turnaround Times in a University Department of Radiology during Implementation of a Reformed Curriculum for Undergraduate Medical Education. Fortschr Röntgenstr 2018; 190: 259 - 264., Competing Interests: Disclosure The authors report no conflicts of interest in this work., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2018
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