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15 March 2019 Study on acceleration schemes in Fresnel volume tomography for sound speed reconstruction
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Abstract
Ultrasound computed tomography (USCT) is a 3D imaging tool, especially for breast screening. Sound-speed tomography as one imaging modal of USCT is widely studied by researchers because of its great clinical potential for early breast cancer detection. Sound-speed reconstruction methods include ray-based methods and wave-based methods. In this study, a ray-based method for sound speed reconstruction: Fresnel volume tomography (FVT) is implemented. We use Limitedmemory Broyden–Fletcher–Goldfarb–Shanno (L-BFGS) optimization algorithm to solve the large and sparse equation for the inversion step. Considering the great computation burden in the L-BFGS inversion process, two kinds of acceleration schemes: CPU parallel and GPU parallel schemes are used and evaluated by in vitro experiment. The corresponding acceleration ratios are 5.3 and 18.6 for the 512×512 sound speed image reconstruction, compared to CPU serial computation.
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Xiaoyue Fang, Yun Wu, Junjie Song, Liang Zhou, Qiude Zhang, Quan Zhou, Yang Peng, Zhaohui Quan, Mingyue Ding, and Ming Yuchi "Study on acceleration schemes in Fresnel volume tomography for sound speed reconstruction ", Proc. SPIE 10955, Medical Imaging 2019: Ultrasonic Imaging and Tomography, 109550N (15 March 2019); https://doi.org/10.1117/12.2511443
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