Patent ID: 8983162
Filing Date: 2015-03-17
Classification: G06T

Abstract:
1. An image reconstruction method comprising: receiving an actual sinogram generated by measuring an object; performing a Monte-Carlo simulation with respect to emission positions in which gamma-rays are generated in the object, the Monte-Carlo simulation performed in parallel per emission position of photons using a graphics processing unit (GPU), wherein the GPU calculates migration of two photons generated in each emission position using the Monte-Carlo simulation and calculates positions of two detectors, that is, coordinates of the two detectors of when the two photons respectively reach the two detectors, and values changed during the migration, that is, the values changed as the two photons respectively pass through an object and migrate; generating a gamma-ray scatter sinogram in which gamma-ray scattering is corrected based on information related to scattered photons generated by the Monte-Carlo simulation; and generating a reconstructed image based on the scatter-corrected sinogram.