Patent ID: 6369389
Filing Date: 2002-04-09
Classification: A61B,G01T

Abstract:
A method of reducing artifacts, caused by generation of unwanted photons by scattering of photons generated from primary events, in a radiation camera, comprising:(a) detecting a radiation event; (b) determining an energy of said event; (c) determining a location of said event; (d) convoluting a weight associated with each event on an event-by-event basis with a spatial filter function, such that the weight associated with the event is distributed over an area including the location of the event, wherein the relative weight distribution between different locations in the area is dependent on the determined energy and wherein the relative weight distribution at one determined energy is different from that at a second determined energy when both determined energies are associated with a primary event having the same energy; (e) repeating (a)-(d) for a plurality of events; and (f) reconstructing an image from the distributed weights.