SOLVING OUTSIDE-FIELD OF VIEW SCATTER CORRECTION PROBLEM IN POSITRON EMISSION TOMOGRAPHY VIA DIGITAL EXPERIMENTATION

摘要

Method and apparatus are disclosed for generating a scatter-corrected image from positron emission tomography (PET) or other radioemission imaging data (20) acquired of an object (12) in a field of view (14). A background portion (26B) of the PET imaging data is identified corresponding to a background region (14B)of the FOV that is outside of the object. An outside-FOV activity estimate (40) for at least one spatial region outside of the FOV and into which the object extends is adjusted(e.g. iterative or several randomly selected estimates)to optimize a simulated scatter distribution for the combination of the PET imaging data and the outside FOV activity estimate to match the background portion (26B) of the PET imaging data. The PET imaging data are reconstructed to generate a scatter- corrected PET image of the object in the FOV using the optimized simulated scatter distribution.