Primary Objective:~--To compare the diagnostic performance of 18F- Fluciclovine pelvic PET/MRI to that of pelvic mpMRI and to determine whether 18F- Fluciclovine pelvic PET/MRI is more accurate than a pelvic mpMRI in detecting pelvic RRPC in men with biochemical recurrence with histopathology as reference standard.~Secondary Objective:~--To study inter-reader reliability of 18F- Fluciclovine pelvic PET/MRI and pelvic mpMRI among the readers.~Exploratory Objective:~--To study correlation between SUVmax and ADCmean in the pelvic RRPC.
To perform both PET scans and MRIs in the same setting using a simultaneous PET/MRI scanner.