The scaremongering on this thread, unsurprisingly is not warranted and highly uninformed. You need to pass through a millimeter scanner 1000–2000 times to equal the dose from a medical chest X-ray.

Not to mention the fact that the average flight a window seat passenger would receive twice the dose of the scanner (2uS).

ref - http://www.sciencedirect.com/science...87850714000168

Frankly anyone who is avoiding the x-ray scanners due to radiation fears, is so uninformed it's sad. If they took any level of investigation into radiation risks in electronics and the regulation around radiological emissions, there really wouldn't be anything to be fearing.