This past Monday I fell and hit my head in a bad reaction to a pain med. Since then I've had temporary dizziness when I raise up from a lying position. My sleep doctor is also a neurologist, so I told his office, and they called in a head CT scan for me. I have some hesitation because I've read of some recent reports saying that CT scans are more carcinogenic than previously thought. When I talked to a nurse at my doctor's office, she said it would take many CT scans to have that effect. Maybe a CT yields some kind of info that an MRI wouldn't. Do you think I have reason to worry about what will probably be a one-time head CT? Thanks!