The x-ray radiation is very, very low dose due to increasingly sensitive x-ray imagers. I suspect that what you might receive in an airport X-Ray machine is comparable to what you might have received in a hospital years ago. Today's hospital X-Ray machines with digital imagers are much lower does than they used to be as well. The shielding is not for the passengers, but the operators. The system probably has various safety locks, but even if everything fails the covers and flaps should prevent any significant leakage. But if you're really concerned about it I imagine you could simply ask one of the manufacturers what is the typical and max output of the x-ray emitter used in their system, how that compares to a common hospital x-ray, and how many fail-safes have to fail before the system emits any significant radiation outside the machine itself. -Adam On 12/20/06, Peter P. wrote: > http://www.cnn.com/2006/US/12/20/baby.airport.reut/index.html -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Moving in southeast Michigan? Buy my house: http://ubasics.com/house/ Interested in electronics? Check out the projects at http://ubasics.com Building your own house? Check out http://ubasics.com/home/ -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist