Fig. 3From: Image quality and detectability in Siemens Biograph PET/MRI and PET/CT systems—a phantom studyContrast recovery coefficients (CRCs) and contrast-to-noise ratios (CNRs) for the PET/CT and PET/MRI systems. CRC vs sphere size for a 8:1 and b 4:1 activity concentrations, and CNR vs sphere size for the c 8:1 and d 4:1 activity concentrations (all reconstructions with 3 iterations and 2 mm voxel size)Back to article page