http://blog.cleveland.com/metro/2009...l_body_sc.html

"Dr. Michael Roizen, chief wellness officer at The Cleveland Clinic, said radiation exposure can have a cumulative effect and has been shown to cause some forms of cancer. Thirty hours of airplane travel is the equivalent of one chest X-ray -- an important health warning for frequent flyers, he said."

Not that it will stop me from taking my 3 trips every year.

Anyone gone through that full body scan machine?