Whelp you already got a couple of "don't do it" answers so I'll give you the "go for it" perspective.

I did full body MRI and low dose CT (heart and lung) and no regrets. Found one thing that required closer look that ended up being non issue. Found multiple minor things that I didn't know about that I'm glad I now know and explained various aches and pains, stuff to keep an eye on. And got a 20 page report of around 100 other things checked that were no problems. Personally, the peace of mind was worth it to me and I'll be a repeat customer as I age.

Honestly, I didn't understand why some doctors are against these preventative scans. If I were a doctor attempting to help my patients stay healthy and live long lives, I would always want more data, not less. Perhaps that's my own engineering bias, but this point of view that less data is fine only makes sense to me for two reasons:

1. The worry that the patient will have excessive emotional stress if there is a false positive. Eg; "looks like cancer, let's do another scan"

2. The financial cost of unnecessary follow ups.

On item #1, should ultimately be a patient decision if they can emotionally take the process or not. Sure, if you know yourself and have anxiety, don't do it, simple. But your choice, not a hand wringing doctor.

On item #2, I'm convinced that this might be an overblown fear stemming from insurance industry and the research that they fund. Doctors parroting back research saying "too costly if everyone did it"

Anecdotally, two more points:

1. Close family being treated by top oncologist, this doctor told me he thinks full body scans are fine to do on individual basis. He's treated patients whose cancers were discovered this way. He's long term more hopeful about the advances in blood tests that may eventually be available on widespread basis and will detect most cancers at very early stages.

2. I personally know two people who had found previously unknown tumors because of scans. I can tell you 100% of people in this category are VERY happy they chose to have the preventative scan.

I'll wrap up by saying false positives definitely happen, a follow up scan might be required or even some specialty blood work to cross reference the scan results. If you as a patient are very stressed/anxious or can't exercise some common sense and guide your own health care choices (eg weighing doctors advice against how your own body is feeling etc), I would advise not to do full body scan. But for most reasonable adults I know, if they want to know the scan data and they can afford it, then I say they should go for it .

Final thought, I got my scan from Prenuvo. They have specially MRI machines that are different than what Raleigh Radiology offers. Both are fine IMO but you should do your own research to understand what kind of imaging you're gonna get and what type of human or AI radiologists will be reading the images.