Fig. 3

Example of an inconsistent evaluation using mpMRI (+) and ⁶⁸Ga-PSMA PET/CT (−) in low- and intermediate-risk PCa. A 59-year-old patient whose serum PSA level was 8.0 ng/ml, and GS was 3 + 3. There is a lesion in the left transition zone of the prostate gland in the pelvic MRI scan (a T2w, arrow; b contrast-enhanced T1w sequence, arrow), and a diffusion restriction (c b 1500 DWI, arrow; d corresponding ADC map, arrow) makes the presence of a large PCa very likely. In the ⁶⁸Ga-PSMA PET/CT there is no strong tracer uptake highly likely to not be diagnosed (arrow in e and f). a–d MRI; e–f ⁶⁸Ga-PSMA PET/CT; a T2w; b: contrast-enhanced T1w; c b 1500 DWI; d ADC map; e maximum intensity projection of the PET; f fusion of ⁶⁸Ga-PSMA PET and low-dose CT