I have gotten the impression that little is known about the effects of radiation, other than that it is very dangerous. This is untrue. Experience goes back about 80 years and the information is probably better documented than that for any other carcinogen.
Radiation is, in fact, a relatively weak carcinogen and mutagen.
This is untrue. Radiation is not very effective in causing cancer and even in large populations exposed to high doses of radiation the increase over the normal cancer rate is small. This is almost always untrue. For individual patients undergoing radiologic procedures related to illness, the benefits of the procedure far outweigh the risks. I have had several x-ray exams over the past couple of years.