How do you feel about full body scanners while pregnant?

...at airports? I had a short international flight recently & of all people, I got chosen at 23 weeks for the scanner. Meanwhile my fiancé casually strolled past.
 
I felt very upset and worried, and couldn't help involuntarily tearing up. No amount of saying "it's perfectly safe" by the baby-faced security dude helped reassure me. He ended up waving me through.
 
I wondered how other ladies felt about it?