Fig. 1From: The effects of various penalty parameter values in Q.Clear algorithm for rectal cancer detection on 18F-FDG images using a BGO-based PET/CT scanner: a phantom and clinical studyCentral transfer slice of the NEMA image quality phantom acquired by a CT scanner and b PET scanner. The 12 regions of interest (ROIs) with a 5Â mm diameter drawn on the background are shown for each imageBack to article page