After the normal MRI and CT Scans were unable to find my recurring PC (post radical prostatectomy), the radiation oncologist I was seeing at the time recommended I have a Carbon 11 Pet/CT Scan done. It's a clinical trial, so insurance won't cover it. The clinical trial/study is being done by Arizona Molecular Imaging and cost me $3K. But, it found the PC. The area identified as being the recurring PC had actually shown up on my MRI, but was "indeterminate" on my "unremarkable" MRI, so was ignored by everyone.