I’ve never had one. I’ve always wanted a PET scan which can illuminate mental health conditions or lack of conditions and reasons for having those conditions, but have never found a place in UT that does them. I’m sure they gave them in LA. I think PET scans are used for more for research than diagnosis.
From what I know from four years of transcribing radiology exam dictations, nuclear medicine scans like a SPECT are typically used to monitor cancer progression. But I think you should ask about having one because what you have going on is as serious as cancer. Know that if you do have a SPECT scan, you’ll be so radioactive that you’ll likely have to spend 1 to 2 nights in a hospital in an isolation room. Then when you get home you’re not allowed to sleep with anybody or a pet for a number of weeks if not months.