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Anton S. Becker
University of Zurich
RadiologyMagnetic resonance imagingNuclear medicineMedicineIntravoxel incoherent motion
76Publications
11H-index
344Citations
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Publications 91
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Abstract Purpose To evaluate a deep learning based image analysis software for the detection and localization of distal radius fractures. Method A deep learning system (DLS) was trained on 524 wrist radiographs (166 showing fractures). Performance was tested on internal (100 radiographs, 42 showing fractures) and external test sets (200 radiographs, 100 showing fractures). Single and combined views of the radiographs were shown to DLS and three readers. Readers were asked to indicate fracture lo...
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#2Hanna SvirydenkaH-Index: 1
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#1Daniel StockerH-Index: 4
#2Anton S. BeckerH-Index: 11
Last. Caecilia S. ReinerH-Index: 19
view all 8 authors...
OBJECTIVES: To compare interreader agreement and diagnostic accuracy of LI-RADS v2018 categorization using quantitative versus qualitative MRI assessment of arterial phase hyperenhancement (APHE) and washout (WO) of focal liver lesions. METHODS: Sixty patients (19 female; mean age, 56 years) at risk for HCC with 71 liver lesions (28 HCCs, 43 benign) who underwent contrast-enhanced MRI were included in this retrospective study. Four blinded radiologists independently assigned a qualitative LI-RAD...
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#1Jose Angelo Udal Perucho (HKU: University of Hong Kong)H-Index: 3
#2Hing-Chiu Chang (HKU: University of Hong Kong)H-Index: 10
Last. Elaine Yuen Phin Lee (HKU: University of Hong Kong)H-Index: 8
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OBJECTIVE: This study aimed to find the optimal number of b-values for intravoxel incoherent motion (IVIM) imaging analysis, using simulated and in vivo data from cervical cancer patients. MATERIALS AND METHODS: Simulated data were generated using literature pooled means, which served as reference values for simulations. In vivo data from 100 treatment-naive cervical cancer patients with IVIM imaging (13 b-values, scan time, 436 seconds) were retrospectively reviewed. A stepwise b-value fitting ...
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#1Benedikt Kranzbühler (UZH: University of Zurich)H-Index: 5
#2Julian Müller (UZH: University of Zurich)H-Index: 4
Last. Irene A. Burger (UZH: University of Zurich)H-Index: 21
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A first analysis of simultaneous Ga-PSMA-11 PET/MRI showed some improvement in the detection of recurrent disease at low serum prostate specific antigen (PSA) values below 0.5 ng/ml compared to the already high detection rate of Ga-PSMA-11 PET/CT. We therefore focused on all patients with biochemical recurrence (BR) and PSA values ≤ 0.5 ng/ml to assess the detection rate for Ga-PSMA-11 PET/MRI. We retrospectively analyzed a cohort of 66 consecutive patients who underwent a Ga-PSMA-11 PET/MRI for...
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#1Sonja Stieb (UZH: University of Zurich)H-Index: 7
#2Markus Klarhoefer (Siemens)H-Index: 3
Last. Cristina Rossi (UZH: University of Zurich)H-Index: 14
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Abstract In this prospective study, we quantified the fast pseudo-diffusion contamination by blood perfusion or cerebrospinal fluid (CSF) intravoxel incoherent movements on the measurement of the diffusion tensor metrics in healthy brain tissue. Diffusion-weighted imaging (TR/TE = 4100 ms/90 ms; b-values: 0, 5, 10, 20, 35, 55, 80, 110, 150, 200, 300, 500, 750, 1000, 1300 s/mm2, 20 diffusion-encoding directions) was performed on a cohort of five healthy volunteers at 3 Tesla. The projections of t...
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#1Edwin E. G. W. ter Voert (UZH: University of Zurich)H-Index: 8
#2Hanna Svirydenka (UZH: University of Zurich)H-Index: 1
Last. Matthias J Betz (University of Basel)
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Background Positron emission tomography (PET) is increasingly applied for in vivo brown adipose tissue (BAT) research in healthy volunteers. To limit the radiation exposure, the injected 18F-FDG tracer dose should be as low as possible. With simultaneous PET/MR imaging, the radiation exposure due to computed tomography (CT) can be avoided, but more importantly, the PET acquisition time can often be increased to match the more extensive magnetic resonance (MR) imaging protocol. The potential gain...
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#1Anton S. Becker (MSK: Memorial Sloan Kettering Cancer Center)H-Index: 11
#2Julian Kirchner (MSK: Memorial Sloan Kettering Cancer Center)
Last. H. Alberto Vargas (MSK: Memorial Sloan Kettering Cancer Center)H-Index: 5
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The aim of this study was to test an interactive up-to-date meta-analysis (iu-ma) of studies on MRI in the management of men with suspected prostate cancer. Based on the findings of recently published systematic reviews and meta-analyses, two freely accessible dynamic meta-analyses (https://iu-ma.org) were designed using the programming language R in combination with the package “shiny.” The first iu-ma compares the performance of the MRI-stratified pathway and the systematic transrectal ultraso...
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OBJECTIVES Non-Cartesian spiral magnetic resonance (MR) acquisition may enable higher scan speeds, as the spiral traverses the k-space more efficiently per given time than in Cartesian trajectories. Spiral MR imaging can be implemented in time-of-flight (TOF) MR angiography (MRA) sequences. In this study, we tested the performance of five 3-dimensional TOF MRA sequences for intracranial vessel imaging at 1.5 T with qualitative and quantitative image quality metrics based on in vitro and in vivo ...
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#1Anna Woloszyk (University of Texas Health Science Center at San Antonio)H-Index: 5
#2Petra WolintH-Index: 9
Last. Maximilian Y. EmmertH-Index: 29
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Quantitative assessment of functional perfusion capacity and vessel architecture is critical when validating biomaterials for regenerative medicine purposes and requires high-tech analytical methods. Here, combining two clinically relevant imaging techniques, (magnetic resonance imaging; MRI and microcomputed tomography; MicroCT) and using the chorioallantoic membrane (CAM) assay, we present and validate a novel functional and morphological three-dimensional (3D) analysis strategy to study neova...
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