Patent ID: 8809791

Claim:
A method of correcting time-of-flight PET imaging data acquired by photon detectors in a PET scanner to account for photon scatter, wherein a field of view of the PET scanner is divided into basis functions, and one or more scattering points (S) is identified in order to apply a continuous time-of-flight scatter simulation model, the method comprising: for each photon scattering point (S), defining a scatter path (ASB) connecting the photon scattering point (S) with at least one pair of photon detectors (A, B), and calculating a scatter contribution to the PET imaging data recorded by the at least one pair of photon detectors (A, B) from each basis function in a set (P S ) of basis functions (p) located along the scatter path (ASB), and wherein the scatter contribution from any one basis function (p) is calculated independently from the scatter contribution from other basis functions (p).