[redschell]

The American Association of Physicists in Medicine seems to have your back:

http://www.usnews.com/science/articles/2012/01/17/phsycists-...

A full-body CT scan results in 12 mSv; a mammogram 0.13 mSv—a hundred times less. The risks from these procedures, according to AAPM, are too low to have been determined reliably, and may be "nonexistent."

Looks like this debate has been going on for a while now.

[johnjm]

Here[1] is a very recent study from Austrialia which concludes CT scans during childhood and adolescent increase the risk of cancer and should be avoided where possible.

[1] http://www.bmj.com/content/346/bmj.f2360