Patent ID: 7915578

Claim:
A method of correcting scattering in SPECT I-123 imaging, the method comprising: a) accessing highly sampled photon energy data for a plurality of pixels corresponding to a first SPECT I-123 image generated using a gamma camera; b) generating, using a microprocessor, a raw energy spectrum for at least some of the pixels utilizing the acquired highly sampled photon energy data; c) acquiring a gamma camera model corresponding to the gamma camera; d) applying, using the microprocessor, a first scattering correction to the raw energy spectrum that utilizes the gamma camera model and an iterative algorithm given by e j new = e j old ∑ i ⁢ ⁢ P ij ⁢ ∑ i ⁢ ⁢ P ij ⁢ S i ∑ k ⁢ ⁢ P ik ⁢ e k old where S i represents counts of an energy spectrum sampled in an ith energy channel, e j old is an initial jth energy component, P ij is the probability of jth energy component correlating to ith energy channel, P ik is the probability of kth energy component correlating to ith energy channel, and e j new is a corrected jth energy component; e) applying, using the microprocessor, a second scattering correction to the raw energy spectrum utilizing a Compton window; and f) generating, using the microprocessor, a correction table with the corrected raw energy spectrum.