Just for laughs I looked up the radiation emissions (as under-reported by TSA)
http://www.tsa.gov/approach/tech/castscope.shtm

And the radiation exposure of various X-ray sources. Oakridge Laboratories;
http://www.oakridge.doe.gov/external...9/Default.aspx

I believe the protocol is to take four X-rays of the cast, one at each quadrant. So, some quick math indicates that the pax and screener receive 0.04 milliRem per screen.

If the screener does three of these in a day that is 0.12 milliRem. A chest X-ray is 10 milliRem. So after 83 days of 3 cast screens per day, the screener will have the same exposure as one chest X-ray. This is on top of any X-rays that the screener receives aside from work activities.

While this may not be a serious health threat in and of itself, that assumes that the cast scope is properly calibrated (questionable at best) and that the screener doesn't repeatedly scan the pax or play with the machine (probable).

If the cast scopes actually have a 10X higher emission rate than reported like the Rapi-Scan NoS units (highly likely) then the screener would be getting the equivalent of a chest X-ray after 8.3 days of cast screens, which now becomes a serious health issue particularly for people of reproductive age.

Clearly TSA deoesn't care if they kill their screeners or cause birth defects in their children anymore than they care about passengers.