发明授权
US08008625B2 Method and apparatus for high-sensitivity single-photon emission computed tomography
有权
用于高灵敏度单光子发射计算机断层扫描的方法和装置
- 专利标题: Method and apparatus for high-sensitivity single-photon emission computed tomography
- 专利标题(中): 用于高灵敏度单光子发射计算机断层扫描的方法和装置
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申请号: US12586863申请日: 2009-09-29
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公开(公告)号: US08008625B2公开(公告)日: 2011-08-30
- 发明人: Muralidhara Subbarao
- 申请人: Muralidhara Subbarao
- 主分类号: G01T1/10
- IPC分类号: G01T1/10
摘要:
A method and apparatus are disclosed for high-sensitivity Single-Photon Emission Computed Tomography (SPECT), and Positron Emission Tomography (PET). The apparatus includes a two-dimensional (2D) gamma detector array that moves to different positions in a three-dimensional (3D) volume space near an emission source and records a data vector g. In particular, the 3D volume space in which emission data g is measured extends substantially along a radial direction r pointing away from the emission source and each photon detector element in the 2D gamma detector array is provided with a very large collimator aperture. Data g is related to the 3D spatial density distribution f of the emission source, noise vector n, and a system matrix H of the SPECT/PET apparatus through the linear system of equations g=Hf+n. This equation is solved for f by a method that reduces the effect of noise.