发明授权
US07902511B2 Method of and software for calculating a scatter estimate for tomographic scanning and system for tomographic scanning
失效
用于计算层析扫描的散射估计的方法和软件以及用于层析扫描的系统
- 专利标题: Method of and software for calculating a scatter estimate for tomographic scanning and system for tomographic scanning
- 专利标题(中): 用于计算层析扫描的散射估计的方法和软件以及用于层析扫描的系统
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申请号: US12518334申请日: 2007-12-18
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公开(公告)号: US07902511B2公开(公告)日: 2011-03-08
- 发明人: Kris Filip Johan Jules Thielemans , Charalampos Panos Tsoumpas , Floribertus P. M. Heukensfeldt Jansen
- 申请人: Kris Filip Johan Jules Thielemans , Charalampos Panos Tsoumpas , Floribertus P. M. Heukensfeldt Jansen
- 申请人地址: GB London US NY Niskayuna
- 专利权人: Hammersmith Imanet Ltd.,General Electric Company
- 当前专利权人: Hammersmith Imanet Ltd.,General Electric Company
- 当前专利权人地址: GB London US NY Niskayuna
- 代理商 Robert F. Chisholm
- 国际申请: PCT/GB2007/004874 WO 20071218
- 国际公布: WO2008/075037 WO 20080626
- 主分类号: G01T1/164
- IPC分类号: G01T1/164
摘要:
The method calculates a scatter estimate for scatter correction of detection data from a subject in a positron emission tomographic scanner. The detection data represent the scattered events and unscattered events of annihilation photons emitted in the subject. The method uses the following steps: determine an estimate of the unscattered events; determine a simulation of the scattered events; determine a value of a scaling factor by fitting the sum of the estimate of the unscattered events and a product of the scaling factor and the simulation of the scattered events to the detection data; and determine the scatter estimate as the product of the scaling factor having said value and the simulation of the scattered events.