Because of the recent nuclear disaster in Japan, I noticed there are quite a few people here who know a lot about nuclear chemistry. So, I can hopefully get some responses from this crowd...

I keep hearing on the news that the new airport scanner presents no more radiation than 2 minutes in an airplane. I guess that's supposed to sound good. To me, that sounds really bad. We're talking the same amount of radiation within about one second. That seems to amount to a concentrated dose. Should I be worried or not?