We have indeed had some discussions on PET scans here in this forum. The newest technology ct/pet is indeed better than the older PET and not as stressful.
I had one and I only had to stay in isolation room for 1 hour and the scan took only 25 minutes.
If you are clostrophobic arrange for sedation prior to getting the test.
The CT/Pet is in essence a 7 foot tube....Or at least that was the design of the one that scanned me.
My test was inconclusive and was followed-up with a anatomical CT thoracic and neck. I am now awaiting an appointment with a thoracic surgeon and a radioligist for small needle biopsy at level 4 in my neck (right side).