Patent ID: 6459085
Filing Date: 2002-10-01
Classification: A61B,G01T

Abstract:
A system for determining an interaction site of a gamma ray in a scintillation crystal, comprising:a scintillation crystal for interacting with gamma radiation to emit photons, the interaction occurring at an interaction site within the scintillation crystal characterized by an x-position, a y-position and a depth of interaction; a first sensor array disposed on one side of said scintillation crystal to detect photons emitted from said scintillation crystal; a second sensor array disposed on another side of said scintillation crystal, opposite said first sensor array, to measure an intensity distribution of photons emitted from said scintillation crystal, said intensity distribution characterized by a width which varies with the depth of interaction; wherein the first sensor array provides a measurement of the x- and y-positions of the interaction site and the second sensor array provides a measurement of the depth of interaction.