Chris, I looked up 10 sites or so. If you want to e-mail me I can send you the links. Basically a lot of hat I read was geared towards adults. It did say that radiation was measured in MREM's. And that over the course of 1 year each person is expoesd to 50 to 400 (in some studies) over 1 year. And that 1 chest x-ray is only 30 MREM's. I will continue to look for info. But in the meantime if you want the links that I have now, e-mail me. Samermk@aol.com