Fig. 4From: Image quality and detectability in Siemens Biograph PET/MRI and PET/CT systems—a phantom studyContrast-to-noise ratios (CNRs) for the PET/CT and PET/MRI systems, for a increasing number of iterations (pixel size ~ 2 mm) and b increasing transaxial pixel sizes (3 iterations), and c CNR vs iterations for different filter settings (PET/CT: OSEM+TOF + PSF, PET/MRI: OSEM+PSF). All results are for the 6-mm hot sphere in the 8:1 activity concentrationBack to article page