Patent ID: 8357903

Claim:
A positron emission tomography (PET) detector module, comprising: an array of scintillation crystal elements, the array including a plurality of substantially optically isolated sub-arrays; and a plurality of photosensors arranged to cover the array of crystal elements and configured to receive light emitted from the array of crystal elements, wherein each photosensor of the plurality of photosensors is arranged to cover a portion of at most two of the sub-arrays, wherein the sub-arrays are optically isolated so that light emitted from an individual scintillation crystal located in a corresponding sub-array is concentrated so as to be primarily received only by those photosensors of the plurality of photosensors that cover the corresponding sub-array; and at least one photosensor of the plurality of photosensors, which receives light emitted from crystals in a first sub-array, also receives light emitted from crystals in one and only one sub-array that is adjacent to the first sub-array.