Data correction and normalization for a new PET scanner having coarse septa

A new PET scanner having coarse septa provides high sensitivity with suppressing single and scattered events. Data correction and normalization methods for the PET scanner have been developed, which include a new scatter correction method utilizing measured scatter event data, component-based normalization for the detector sensitivity and segmentation attenuation correction using X-ray CT scanner data. Some coincidence lines among the detectors are intercepted by the coarse septa. The data intercepted by the septa, shady data, mostly consist of scatter events, while those not intercepted by the septa, sunny data, include both true and scatter events. Thus the scatter components can be corrected by the subtraction of the shady data from the sunny data. Preliminary studies of new scatter correction were performed with phantoms.