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A. C. Dhanantwari
Researcher at Ontario Institute for Cancer Research
Publications - 8
Citations - 144
A. C. Dhanantwari is an academic researcher from Ontario Institute for Cancer Research. The author has contributed to research in topics: Imaging phantom & Image quality. The author has an hindex of 5, co-authored 8 publications receiving 137 citations.
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Journal ArticleDOI
Optimization of image acquisition techniques for dual-energy imaging of the chest
N. A. Shkumat,Jeffrey H. Siewerdsen,A. C. Dhanantwari,D. B. Williams,Samuel Richard,Narinder Paul,John Yorkston,R. Van Metter +7 more
TL;DR: Optima were computed to maximize lung nodule detectability as characterized by the signal-difference-to-noise ratio (SDNR) in DE chest images to guided the implementation of a prototype dual-energy chest imaging system for imaging trials in early-stage lung nodules and ribs detection and diagnosis.
Journal ArticleDOI
Cardiac gating with a pulse oximeter for dual-energy imaging.
N. A. Shkumat,Jeffrey H. Siewerdsen,Jeffrey H. Siewerdsen,A. C. Dhanantwari,D. B. Williams,Narinder Paul,John Yorkston,R. Van Metter +7 more
TL;DR: The data indicate that successful diastolic gating results in a statistically significant reduction in the magnitude of cardiac motion artifact, with residual artifact attributed primarily to gross patient motion.
Proceedings ArticleDOI
High-performance dual-energy imaging with a flat-panel detector: imaging physics from blackboard to benchtop to bedside
Jeffrey H. Siewerdsen,Jeffrey H. Siewerdsen,N. A. Shkumat,A. C. Dhanantwari,D. B. Williams,S. Richard,Michael J. Daly,Narinder Paul,Douglas J. Moseley,David A. Jaffray,J. Yorkston,R. Van Metter +11 more
TL;DR: Evaluation of task-based NEQ indicates that the detectability of subtle lung nodules in double-shot DE imaging can exceed that of single- shot DE imaging by a factor of 4 or greater, and a preclinical imaging system suitable for human studies has been constructed based upon insights gained from theoretical and experimental studies.
Journal ArticleDOI
Optimal kVp selection for dual-energy imaging of the chest: Evaluation by task-specific observer preference tests
D. B. Williams,Jeffrey H. Siewerdsen,Daniel J. Tward,Narinder Paul,A. C. Dhanantwari,N. A. Shkumat,Samuel Richard,John Yorkston,R. Van Metter +8 more
TL;DR: Observantitative identification of optimal, task-specific imaging techniques in dual-energy (DE) imaging of the chest with respect to a variety of visualization tasks for soft and bony tissue provided useful guidance toward clinical implementation of high-performance DE imaging systems.
Proceedings ArticleDOI
Development and implementation of a high-performance, cardiac-gated dual-energy imaging system
N. A. Shkumat,Jeffrey H. Siewerdsen,Jeffrey H. Siewerdsen,A. C. Dhanantwari,D. B. Williams,S. Richard,Daniel J. Tward,Narinder Paul,J. Yorkston,R. Van Metter +9 more
TL;DR: The development of a high-performance DE chest imaging system was developed, directing x-ray exposures to within the quiescent period of the heart cycle, thereby minimizing anatomical misregistration.