You REALLY want to try to compare elective, controlled amounts of radiation you received to nuclear waste being dumped into the air, water, and land??? You were advised of the cancer risk when you accepted the treatment, weren’t you? Because of liability, Doctors, Dentists etc. all advise of the risk/benefits. I am quite certain you were not asked to ingest or inhale cesium, strontium, plutonium etc. for your treatment. There is no comparison.
The initial reports of deadly amounts of radiation contaminating the USA have been shown to be unscientific and plain alarmists. Anonymous “landmark” studies are also unreliable. I have had CBN training in the military later service and think this alarm ism is silly and sometimes hilarious. The cesium in my gasoline lantern have not killed me yet. 65 pounds of plutonium disappeared form Rocky flats weapons factory in fire upwind form me when I was a kid and no problems. We depend on the radioactive decay in the earth for half of our heat or we would freeze to death.