Fig. 1

Comparison of non-contrast CT, MRI and PSMA PET in subject 2. a Non-contrast CT or c non-contrast T1 sequence of MRI did not reveal a lesion in the right lobe of the liver. On b and d which are PSMA PET images, a focal liver lesion was identified with SUVmax of 15.3 and dimensions of 17 × 13 × 14 mm. d Fused PET and CT images. The patient had moderate renal impairment and contrast allergy, prohibiting intravenous contrast with MRI or CT