Ugh. I am just about fed up with all the comparing of TSA to physicians, between the xray use and the physicality of the pat-downs. (not aiming at you, danl08, just using your quote as a bridge)

They have nothing to do with each other. And any comparison is just insulting. When someone...a patient...goes to the doctor and gets a physical exam and perhaps xrays or other imaging...there is a REASON to do it. First of all, the patient willingly goes in for care, and has a symptom to be resolved. Then, further workup is done, if indicated. And all of this is by people with years of training.

TSA...is treating everyone as if there is something to resolve, with very little training.

I'm sure there is someone here in my hometown who has pneumonia right this minute. If I suggested that even 1000 randomly selected people each day (much less hundreds of thousands) come in to all get a chest xray to try to find the person with pneumonia, that would be considered ludicrous. It might make a little more sense if I required everyone with a cough to get an xray. But more sense indeed, if people had a cough, fever and rales on exam.
TSA seriously needs to consider some way to narrow down their search. Oh, but that would require intelligence. My bad.