Polygonal pixel grid based PET image reconstruction algorithm: Development, application and performance comparison

Polygonal pixel grid based PET image reconstruction algorithm: Development, application and performance comparison
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DOI：
10.1109/nssmic.2013.6829237
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发表时间：
2013-10
期刊：
2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)
影响因子：
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通讯作者：
Yu Yunhan;Yan Xia;Wei Wang;Yaqiang Liu;K. Ying;Shi Wang;Tianyu Ma
Yu Yunhan;Yan Xia;Wei Wang;Yaqiang Liu;K. Ying;Shi Wang;Tianyu Ma
中科院分区：
其他
文献类型：
--
作者：
Yu Yunhan;Yan Xia;Wei Wang;Yaqiang Liu;K. Ying;Shi Wang;Tianyu Ma

文献摘要

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System matrix works as an association between image and detected data. Accurate expression of the system matrix is a key component during PET image reconstruction. However, with numerous Line-of-Responses (LORs) detected in modern 3D PET scanner, the huge storage size of a full system matrix increases computational burden. To solve this essential issue, we designed a rotationally symmetric polygonal pixel grid with fan-shaped segments in the image domain to efficiently compress the matrix with geometrical symmetries. This idea mainly came from the polygonal geometry of detector rings in most PET system.