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Amir Owrangi
Researcher at University of Texas Southwestern Medical Center
Publications - 60
Citations - 1345
Amir Owrangi is an academic researcher from University of Texas Southwestern Medical Center. The author has contributed to research in topics: Brachytherapy & Dosimetry. The author has an hindex of 16, co-authored 56 publications receiving 1050 citations. Previous affiliations of Amir Owrangi include University of Western Ontario & University of Michigan.
Papers
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Journal ArticleDOI
Hyperpolarized 3He and 129Xe MR imaging in healthy volunteers and patients with chronic obstructive pulmonary disease.
Miranda Kirby,Sarah Svenningsen,Amir Owrangi,Andrew Wheatley,Adam Farag,Alexei Ouriadov,Giles E. Santyr,Roya Etemad-Rezai,Harvey O. Coxson,David G. McCormack,Grace Parraga +10 more
TL;DR: In patients with COPD, the VDP obtained with hyperpolarized 29Xe MR imaging was significantly greater than that with 3He MR imaging, suggesting incomplete or delayed filling of lung regions that may be related to the different properties of 129Xe gas and physiologic and/or anatomic abnormalities in COPD.
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MRI-only treatment planning: benefits and challenges
TL;DR: A short review of the concepts and techniques that have been developed for implementation of MRI-only workflows in radiation therapy is provided in this document.
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MRI-only brain radiotherapy: Assessing the dosimetric accuracy of synthetic CT images generated using a deep learning approach
Samaneh Kazemifar,Sarah McGuire,Robert Timmerman,Zabi Wardak,Dan Nguyen,Yang Park,Steve B. Jiang,Amir Owrangi +7 more
TL;DR: The GAN model developed produced highly accurate synthetic CT images from conventional, single-sequence MRI images in seconds, and has strong potential to perform well in a clinical workflow for MRI-only brain treatment planning.
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Pulmonary ventilation visualized using hyperpolarized helium-3 and xenon-129 magnetic resonance imaging: differences in COPD and relationship to emphysema
Miranda Kirby,Sarah Svenningsen,Nikhil Kanhere,Amir Owrangi,Amir Owrangi,Andrew Wheatley,Harvey O. Coxson,Giles E. Santyr,Nigel A. M. Paterson,David G. McCormack,Grace Parraga +10 more
TL;DR: In subjects with chronic obstructive pulmonary disease (COPD), hyperpolarized xenon-129 (129Xe) magnetic resonance imaging (MRI) reveals significantly greater ventilation defects than Hyperpolarize...
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Segmentation of the prostate and organs at risk in male pelvic ct images using deep learning
Samaneh Kazemifar,Anjali Balagopal,Dan Nguyen,Sarah McGuire,Raquibul Hannan,Steve B. Jiang,Amir Owrangi +6 more
TL;DR: In this paper, a 2D U-Net model is proposed to directly learn a mapping function that converts a CT grayscale image to its corresponding 2D OAR segmented image.