the invention relates to a system and method for executing a scanning procedure comprising the steps of generating ct image data for a scan , generating ct attenuation correction data for the scan , acquiring a current frame of pet data for the scan in a 3d format , and simultaneously conducting the following steps : reconstructing at least a portion of a pet image for the current frame , including the step of overlapping a portion of the current frame with an adjacent frame , and acquiring at least a portion of a next frame of pet data .