Review of the TSA scanners by a PhD candidate in biochemistry and biophysics.
Not encouraging, but then everyone I've talked to who's had anything to do with medical imaging has had bad things to say about this program. I was never a biophysicist, but I had a lot of time to look at imaging technology and I can say that you won't get me in one of those machines without a cattle prod. They might not be deadly, but there's no way to make X-rays compatible with human biology.
Jason Bell is right about another thing. The people most at risk from these scanners are the TSA people themselves. That's a lot of whole body radiation for anyone to be exposed to.