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Proceedings Paper

Radiation dose reduction and CNR enhancement in C-arm cone beam CT
Author(s): Kai Niu; Jie Tang; Kevin Royalty; Orhan Ozkan; Charles Strother; Beverly Aagaard-Kienitz; Kari A. Pulfer; Guang-Hong Chen
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Paper Abstract

In this work we applied dose reduction using the prior image constrained compress sensing (DR-PICCS) method on a C-arm cone beam CT system. DR-PICCS uses a smoothed image as the prior image. After applying DRPICCS, the final image will have noise variance inherited from the prior image and spatial resolution from the projection data. In order to investigate the dose reduction of DR-PICCS, three different dose levels were used in C-arm scans of animal subjects using a Siemens Zeego C-arm system under an IACUC protocol. Image volumes were reconstructed using the standard FBP and DR-PICCS algorithms(total of 160 images). These images were randomly mixed and presented to three experienced interventional radiologists(each having more than twenty years reading experience) to review and score using a five-point scale. After statistical significance testing, the results show that DR-PICCS can achieve more than 60% dose reduction while keeping the same image quality. And if we compare FBP and DR-PICCS at the same dose level the results show that DR-PICCS will generate higher quality images.

Paper Details

Date Published: 19 March 2013
PDF: 6 pages
Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86682S (19 March 2013); doi: 10.1117/12.2007736
Show Author Affiliations
Kai Niu, Univ. of Wisconsin-Madison (United States)
Jie Tang, Univ. of Wisconsin-Madison (United States)
Kevin Royalty, Siemens Medical Solutions (United States)
Orhan Ozkan, Univ. of Wisconsin-Madison (United States)
Charles Strother, Univ. of Wisconsin-Madison (United States)
Beverly Aagaard-Kienitz, Univ. of Wisconsin-Madison (United States)
Kari A. Pulfer, Univ. of Wisconsin-Madison (United States)
Guang-Hong Chen, Univ. of Wisconsin-Madison (United States)

Published in SPIE Proceedings Vol. 8668:
Medical Imaging 2013: Physics of Medical Imaging
Robert M. Nishikawa; Bruce R. Whiting; Christoph Hoeschen, Editor(s)

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