发明名称 |
Modeling of the point-spread-function in single-pinhole and multi-pinhole spect reconstruction |
摘要 |
A system and method for reconstructing single photon emission computed tomography data acquired with a pinhole collimator includes sub-dividing each voxel in the imaging target object space into sub-voxels and sub-dividing each of the detector bins in the gamma camera detector into sub-bins, connecting the centers of each of the sub-voxels to each of the detector sub-bins through a pinhole provided in the pinhole collimator by ray tracing and for each ray connecting the centers of each of the sub-voxels to each of the detector sub-bins, the transmission probability is calculated by analytically solving the intersections between the ray and the pinhole surfaces. Then, a geometric-response-function of the pinhole collimator is computed which is then convolved with the intrinsic-response-function of the detector to obtain the PSF. |
申请公布号 |
US8389943(B2) |
申请公布日期 |
2013.03.05 |
申请号 |
US20090568339 |
申请日期 |
2009.09.28 |
申请人 |
AUSTIN DEREK W.;CHEN MU;FENG BING;MINTZER ROBERT A.;SMITH ANNE M.;SIEMENS MEDICAL SOLUTIONS USA, INC. |
发明人 |
AUSTIN DEREK W.;CHEN MU;FENG BING;MINTZER ROBERT A.;SMITH ANNE M. |
分类号 |
G01T1/166;G01T1/00 |
主分类号 |
G01T1/166 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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