I was at 911 memorial last week. My Fuji S-1 Pro camera was scanned with the battery installed. Security personnel would not let me remove battery. Since then, a dark spot shows up on photos. This has happened before and the CCD assembly had to be replaced at a cost of $400. Is scanning to really blame for this?
Having the battery in the camera shouldn't make a bit of difference if the camera was turned off. I'm also not aware of any particular reason that the scanning equipment should have caused a problem, but what you are describing sounds like a dead or hot pixel. This is just something that can happen on cameras unfortunately. It's also possibly some dust on the sensor or lens.