Patent ID: 6346706
Filing Date: 2002-02-12
Classification: A61B,G01T

Abstract:
An imaging system for use with a photon source disposed within an imaging area and generating photons having an energy within a known energy range, the system for determining the location of the source and comprising:first and second oppositely facing detector pairs disposed on opposite sides of the imaging area, each pair comprising: a first detector unit, when photons enter the first unit, the first unit scattering at least a portion of the photons during scattering events along trajectories having random angles and generating signals indicative of scattering event locations, times and energy deposits; a second detector unit juxtaposed with respect to the first detector unit such that at least a portion of the scattered photons impinge upon the second unit and are absorbed thereby during absorption events, upon an absorption event, the second unit generating signals indicative of the energy absorbed during the absorption event and absorption event times; and a processor receiving the signals from the first and second detectors and mathematically combining those signals to determine the photon source.