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Rapid construction of system response matrix based on geometric symmetries for the quad-head PET system
Author(s): Jian Cheng; Fanzhen Meng; Yu Shi; Ye Mao; Chenfeng Li; Jimin Liang; Shouping Zhu
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Paper Abstract

The quad-head PET system has a compact structure which leads to the depth of interaction (DOI) blurring. The Monte Carlo (MC) simulation can eliminate the DOI effect significantly, and it has been utilized in the dual-head PET systems. For the quad-head PET system, the geometric symmetry is less, which makes the MC simulation difficult. The multi-ray method combined with the DOI model can also relieve the effect of the DOI blurring, but it is time-consumed. In this study, we focus on the rapid construction of the system response matrix (SRM) based on geometric symmetries for the multi-ray method. During the construction of the SRM, the SRM is divided into two parts: the SRM of the opposite detectors and the SRM of the adjacent detectors. The general processor unit (GPU) is utilized to improve the computation speed. The result shows that the computation time is largely decreased when the geometric symmetries are used. The simulation experiments indicate that the data of adjacent detector heads and the DOI model are helpful to improve the quality of the quad-head PET reconstruction.

Paper Details

Date Published: 28 May 2019
PDF: 5 pages
Proc. SPIE 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 110720M (28 May 2019); doi: 10.1117/12.2534803
Show Author Affiliations
Jian Cheng, Xidian Univ. (China)
Fanzhen Meng, Xidian Univ. (China)
Yu Shi, Xidian Univ. (China)
Ye Mao, Xidian Univ. (China)
Chenfeng Li, Xidian Univ. (China)
Jimin Liang, Xidian Univ. (China)
Shouping Zhu, Xidian Univ. (China)


Published in SPIE Proceedings Vol. 11072:
15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine
Samuel Matej; Scott D. Metzler, Editor(s)

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