Positron emission tomography system with hybrid detection geometries and sampling
AssigneesKabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
InventorsDaniel Gagnon, Wenli Wang
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Abstract
A gamma ray detection system includes a plurality of detector modules having a same length, where each detector module is configured to detect gamma rays generated from positron annihilation events. A first detector module of the plurality of detector modules is shifted by a predetermined distance in an axial direction from a second detector module of the plurality of detector modules that is adjacent to the first detector module, where the predetermined distance is less than the length of the detector modules.
Claims17
A gamma ray detection system, comprising:
- a plurality of detector modules having a same length, each detector module being configured to detect gamma rays generated from positron annihilation events,
- wherein a first detector module of the plurality of detector modules is shifted by a predetermined distance in an axial direction from a second detector module of the plurality of detector modules that is adjacent to the first detector module to generate a shifted detector having a central scanning region, a first peripheral scanning region, and a second peripheral scanning region so that the effective overall axial field of view of the shifted detector that is useable for imaging is larger than an axial field of view of the detector modules when arranged unshifted, the predetermined distance being less than the length of the detector modules.
A Positron Emission Tomography (PET) system, comprising:
- a plurality of radiation detector modules having a same length and arranged in a cylindrical ring, each detector module being configured to detect gamma rays generated from positron annihilation events,
- wherein a first detector module of the plurality of detector modules is shifted by a predetermined distance in an axial direction from a second detector module of the plurality of detector modules that is adjacent to the first detector module to generate a shifted detector having a central scanning region, a first peripheral scanning region, and a second peripheral scanning region so that the effective overall axial field of view of the shifted detector that is useable for imaging is larger than an axial field of view of the detector modules when arranged unshifted, the predetermined distance being less than the length of the detector modules, wherein
- the central scanning region has an axial field of view equal to the length of the detector modules minus the predetermined distance,
- the first peripheral scanning region has an axial field of view equal to the predetermined distance, and
- the second peripheral scanning region has an axial field of view equal to the predetermined distance.
A non-transitory computer readable storage medium storing a computer program, which when executed by a computer, causes the computer to:
- collect, from a plurality of detector modules, event data corresponding to annihilation events, the plurality of detector modules having a same length and arranged in a cylindrical ring, each detector module being configured to detect gamma rays generated from the annihilation events,
- wherein a first detector module of the plurality of detector modules is shifted by a predetermined distance in an axial direction from a second detector module of the plurality of detector modules that is adjacent to the first detector module to generate a shifted detector having a central scanning region, a first peripheral scanning region, and a second peripheral scanning region so that the effective overall axial field of view of the shifted detector that is useable for imaging is larger than an axial field of view of the detector modules when arranged unshifted, the predetermined distance being less than the length of the detector module.
Dependencies are inferred from the claim text.