Investigation of scatter from out of the field of view and multiple scatter in pet using monte carlo simulations
文献类型：期刊论文
| 作者 | Ye Ting1,2; Chai Pei1; Gao Juan1,2; Yun Ming-Kai1; Liu Shuang-Quan1,2; Shan Bao-Ci1; Wei Long1 |
| 刊名 | Chinese physics c
 |
| 出版日期 | 2011-12-01 |
| 卷号 | 35期号:12页码:1166-1171 |
| 关键词 | Pet Monte carlo simulation Gate Scattering |
| ISSN号 | 1674-1137 |
| DOI | 10.1088/1674-1137/35/12/017 |
| 通讯作者 | Ye ting() |
| 英文摘要 | In fully three-dimensional (3d) positron emission tomography (pet) imaging, the scatter fraction (sf) is about 40%-60%, which may degrade the imaging quality severely. scatter correction is important for high quality image reconstruction. model-based scatter correction has been proved to be accurate and available in clinical pet. however, it does not correct the scatter from out of the field of view (ofov) and multiple scatters. in this study, we demonstrate the radial and axial distribution of scatters from ofov when the source is located in different radial positions. in order to apply the above conclusions to different pet systems, we characterize the scatters from ofov as a function of the ratio of the scanner diameter to the length of the axial field of view (afov) by modeling several typical whole-body and micro pet systems. the proportions of true events (s(0-0)), single scatter of one photon (s(1-0)), single scatter of both photons (s(1-1)), double scatter of one photon (s(2-0)) and multiple scatter (s(m)) are also calculated and compared. here the 3d-pet monte carlo simulations are performed with the geant4 application for tomography emission (gate). in summary, the scatters from ofov tend to be recorded on the lines of response (lor) far away from the source. they have a much more serious impact on whole-body pet than micro pet depending on the ratio of scanner diameter to the length of afov. in whole-body pet, twice scatters including single scatter of both photons (s(1-1)) and double scatter of one photon (s(2-0)) add up to about 12% so that twice scatter correction must be taken into account to acquire a high quality reconstruction image. |
| WOS关键词 | GATE ; SCANNER ; VALIDATION ; PLATFORM ; EMISSION ; SINGLE ; SPECT ; MODEL |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Nuclear ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000297908600017 |
| 出版者 | CHINESE PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176202 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Ye Ting |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Nucl Anal Tech, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ye Ting,Chai Pei,Gao Juan,et al. Investigation of scatter from out of the field of view and multiple scatter in pet using monte carlo simulations[J]. Chinese physics c,2011,35(12):1166-1171. |
| APA | Ye Ting.,Chai Pei.,Gao Juan.,Yun Ming-Kai.,Liu Shuang-Quan.,...&Wei Long.(2011).Investigation of scatter from out of the field of view and multiple scatter in pet using monte carlo simulations.Chinese physics c,35(12),1166-1171. |
| MLA | Ye Ting,et al."Investigation of scatter from out of the field of view and multiple scatter in pet using monte carlo simulations".Chinese physics c 35.12(2011):1166-1171. |
入库方式： iSwitch采集
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。