Patent ID: 8274054
Filing Date: 2012-09-25
Classification: A61B,G01T

Abstract:
1. A method for determining a sequence of energy interactions in a detector, the method comprising: receiving a plurality of discrete energy interactions in a plurality of detector voxels; forming a plurality of possible sequences of interaction based on said received plurality of discrete energy interactions; for each of said plurality of possible sequences of interaction, computing an a posteriori probability, the a posteriori probability being based on a likelihood that the possible sequence of interaction is consistent with said received plurality of discrete energy interactions; and selecting one of said formed plurality of possible sequences of interaction based on said computed a posteriori probability; wherein said receiving a plurality of discrete energy interactions comprises receiving from the detector a plurality of signals corresponding to particular detector voxel locations and a plurality of energy measurements; wherein said computing an a posteriori probability comprises; for each of the plurality of detector voxels in the particular sequence, generating a distribution of multiple positions within the detector voxel; determining a plurality of realizations by selecting at least one of the generated multiple positions for each detector voxel in the particular sequence; for each of said determined realizations, computing an a posteriori probability; and combining said computed a posteriori probability over all of said determined plurality of realizations to provide said computed a posteriori probability objective for the particular sequence.