CASIA OpenIR  > 中国科学院分子影像重点实验室
Comparison of GPU reconstruction based on different symmetries for dual-head PET
Meng, Fanzhen1; Wang, Jianxun1; Zhua, Shouping1; Cheng, Jian1; Liang, Jimin1; Tian, Jie1,2
Source PublicationMEDICAL PHYSICS
ISSN0094-2405
2019-06-01
Volume46Issue:6Pages:2696-2708
Corresponding AuthorZhua, Shouping(spzhu@xidian.edu.cn) ; Tian, Jie(tian@ieee.org)
AbstractPurpose: Dual-head positron emission tomography (PET) scanners have increasingly attracted the attention of many researchers. However, with the compact geometry, the depth-of-interaction blurring will reduce the image resolution considerably. Monte Carlo (MC)-based system response matrix (SRM) is able to describe the physical process of PET imaging accurately and improve reconstruction quality significantly. The MC-based SRM is large and precomputed, which leads to a longer image reconstruction time with indexing and retrieving precomputed system matrix elements. In this study, we proposed a GPU acceleration algorithm to accelerate the iterative reconstruction. Methods: It has been demonstrated that the line-of-response (LOR)-based symmetry and the Graphics Processing Unit (GPU) technology can accelerate the reconstruction tremendously. LOR-based symmetry is suitable for the forward projection calculation, but not for the backprojection. In this study, we proposed a GPU acceleration algorithm that combined the LOR-based symmetry and voxel-based symmetry together, in which the LOR-based symmetry is responsible for the forward projection, and the voxel-based symmetry is used for the backprojection. Results: Simulation and real experiments verify the efficiency of the algorithm. Compared with the CPU-based calculation, the acceleration ratios of the forward projection and the backprojection operation are 130 and 110, respectively. The total acceleration ratio is 113x. In order to compare the acceleration effect of the different symmetries, we realized the reconstruction with the voxel-based symmetry and the LOR-based symmetry strategies. Compared with the LOR-based GPU reconstruction, the acceleration ratio is 3.5x. Compared with the voxel-based GPU reconstruction, the acceleration ratio is 12x. Conclusion: We have proposed a new acceleration algorithm for the dual-head PET system, in which both the forward and backprojection operations are accelerated by GPU. (c) 2019 The Authors. Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.
Keyworddual-head PET GPU reconstruction symmetry
DOI10.1002/mp.13529
WOS KeywordPOSITRON EMISSION MAMMOGRAPHY ; IMAGE-RECONSTRUCTION ; SCANNER ; SYSTEM ; DETECTORS ; MATRIX ; GATE
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC0103800] ; National Natural Science Foundation of China[81227901] ; National Natural Science Foundation of China[61471279] ; China Postdoctoral Science Foundation[2018M643589] ; Fundamental Research Funds for the Central Universities
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Fundamental Research Funds for the Central Universities
WOS Research AreaRadiology, Nuclear Medicine & Medical Imaging
WOS SubjectRadiology, Nuclear Medicine & Medical Imaging
WOS IDWOS:000471277706010
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ia.ac.cn/handle/173211/26057
Collection中国科学院分子影像重点实验室
Corresponding AuthorZhua, Shouping; Tian, Jie
Affiliation1.Xidian Univ, Engn Res Ctr Mol & Neuro Imaging, Minist Educ, Sch Life Sci & Technol, Xian 710071, Shaanxi, Peoples R China
2.Chinese Acad Sci, Key Lab Mol Imaging, Inst Automat, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Meng, Fanzhen,Wang, Jianxun,Zhua, Shouping,et al. Comparison of GPU reconstruction based on different symmetries for dual-head PET[J]. MEDICAL PHYSICS,2019,46(6):2696-2708.
APA Meng, Fanzhen,Wang, Jianxun,Zhua, Shouping,Cheng, Jian,Liang, Jimin,&Tian, Jie.(2019).Comparison of GPU reconstruction based on different symmetries for dual-head PET.MEDICAL PHYSICS,46(6),2696-2708.
MLA Meng, Fanzhen,et al."Comparison of GPU reconstruction based on different symmetries for dual-head PET".MEDICAL PHYSICS 46.6(2019):2696-2708.
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