I had the head to toe CT/PET. Scared the bejesus out of me when I reviewed the CD. They inject radiation into the vein and then put you slowly back and forth through the scanner.
Cancer cells light up. My entire brain, bladder, kidneys and urinary tract could have lit an airport runway.
Turns out, that isn't anything to worry about because the radioactive material gets passed from the body through the urinary tract and the action of the brain makes it light up.
Since, at the time, I had been told that both my kidneys had bladder cancer, I thought it was confirmation...but it wasn't.
That test is no good for checking those areas.
I guess I deserved the scare for being silly enough to try to read the scans on my computer instead of just waiting the 24 hours to get the report. They did find some mass in my thyroid but that just turned out to be a benign cyst.
So....if they do order one, I suggest waiting for the report. It does look pretty cool though!
As Pat said, they may not order one and even if they do, it may not be the whole body.
Mike