True 3D iterative scatter correction for small bore long axial FOV scanner

In this study, we propose using a true 3D iterative scatter simulation for a small bore long axial FOV scanner such as the HRRT and Siemens MR/PET head insert. We compare the effect of 2D and 3D scatter to a final image using dynamic Fally Pride neuro receptor. 2D and 3D scatter correction are calculated. Then normalization, attenuation, scatter correction is applied to each frame to generate two sets of images for both scatter correction. The affect of both scatter methods on the final images are compared in hot and cold regions throughout the study duration.