Patent ID: 9012855
Filing Date: 2015-04-21
Classification: G01T

Abstract:
1. A radiation detector comprising: a scintillator crystal; a rotary mounting supporting the scintillator crystal allowing rotation of the scintillator crystal about a rotation axis; a drive means arranged to rotate the scintillator crystal about the rotation axis to controllable angles; a processing means arranged to cause the drive means to rotate the scintillation crystal to a plurality of measurement angles, to measure the response of the scintillation crystal at the plurality of angles, and to determine the direction of a radiation source from the measurements of photons at the plurality of measurement angles; and a photon detector arranged to measure photons emitted by the scintillator crystal in response to radiation; wherein the scintillator crystal is shaped to present a cross-section to radiation from a radiation source, the cross section varying that varies as a function of measurement angle as the scintillator crystal rotates about the rotation axis.