Patent Number: 8,791,514

Title: Providing variable cell density and sizes in a radiation detector

Abstract: An apparatus and method to decrease light saturation in a photosensor array and increase detection efficiency uses a light distribution profile from a scintillator-photodetector geometry to configure the photosensor array to have a non-uniform sensor cell pattern, with varying cell density and/or varying cell size and shape. A solid-state photosensor such as a SiPM sensor having such a non-uniform cell structure realizes improved energy resolution, higher efficiency and increased signal linearity. In addition the non-uniform sensor cell array can have improved timing resolution due to improvements in statistical fluctuations. A particular embodiment for such photosensors is in PET medical imaging.

Inventors: Henseler; Debora (Erlangen, DE), Grazioso; Ronald (Knoxville, TN), Zhang; Nan (Knoxville, TN)

Assignee: Siemens Medical Solutions USA, Inc.

International Classification: H01L 27/146 (20060101)

Expiration Date: 7/29/12018