Fig. 3

A 77-year old patient with biochemical recurrence of PCa after radical prostatectomy. His PSA level at the time of examination was 2.0 ng/ml. In MRI, a lesion in the prostate bed with hypointense T2w signal, suspicious for PCa local recurrence is depicted (A, arrow). The lesion shows marked early contrast enhancement in the dynamic T1w (B, arrow) and distinct diffusion restriction with signal increase in the b1500 image (C, arrow) and corresponding signal decrease in ADC map (D, arrow). In the hybrid imaging modalities PET-CT (E) and PET-MRI (F, G), the suspicious lesion is overseen due to its masking by intensive tracer accumulation in the urinary bladder