发明授权
US07888632B2 Co-registering attenuation data and emission data in combined magnetic resonance/positron emission tomography (MR/PET) imaging apparatus
有权
联合磁共振/正电子发射断层扫描(MR / PET)成像装置共同配准衰减数据和发射数据
- 专利标题: Co-registering attenuation data and emission data in combined magnetic resonance/positron emission tomography (MR/PET) imaging apparatus
- 专利标题(中): 联合磁共振/正电子发射断层扫描(MR / PET)成像装置共同配准衰减数据和发射数据
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申请号: US12564685申请日: 2009-09-22
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公开(公告)号: US07888632B2公开(公告)日: 2011-02-15
- 发明人: Ralf Ladebeck , Christian J. Michel , Charles C. Watson
- 申请人: Ralf Ladebeck , Christian J. Michel , Charles C. Watson
- 申请人地址: US PA Malvern
- 专利权人: Siemens Medical Solutions USA, Inc.
- 当前专利权人: Siemens Medical Solutions USA, Inc.
- 当前专利权人地址: US PA Malvern
- 代理商 Peter L. Kendall
- 主分类号: G01T1/161
- IPC分类号: G01T1/161
摘要:
A method for co-registering attenuation data of MR coils in a MR/PET imaging system with PET emission data includes computing a likelihood of PET emission data on a grid in a parameter space based on an algorithm, wherein the algorithm defines L(λ, μbody, μcoils{p}) as a log-likelihood of measured PET data, where λ is an emitter distribution (image), μbody is a known linear attenuation coefficient (LAC) distribution of the body from MRI, μcoils is a linear attenuation coefficient map of MRI coils, and {p} is a set of parameters governing the position of each coil, wherein if μcoils is assumed, then λ can be reconstructed and forward projected and L can be computed. The method includes adjusting the estimated position of the MR coils to maximize the likelihood of emission data based on the computed L.