June, I think, Slang.
As I always tell people who say "just go get X test to ease your mind," dx testing aren't necessarily risk free. Even if the test, itself, holds no risk, often med testing lead to increased/unnecessary biopsies etc. The testing you've had will only raise your risk negligibly. However, it is important not go running off demanding testing out of some sense of "peace of mind". The REAL damage won't be the radiation ( I mean many cancers are treated with it). The real damage is that it makes anxiety worse in the end.
Having said those lovely things. Out of fear I believe I have had two x-rays "for peace of mind"---one was sinus and one was a dental. I've had 2 brain MRIs and one ultrasound for "reassurance"
I have never had a ct scan. All of my med testing containing radiation, over the years have been, x-rays for actual injuries, dental x-rays and annual mammograms. I have had mris of my back, ultrasounds, blood work, EMG, NCS and 2 uterine biopsies for diagnostic purposes. I have an eye condition for which I am followed and have had an eye test twice that requires dye injected into my blood to do. I have had 1 colonoscopy (age related)
finally: Diagnostic testing is necessary for people everyday.. they shouldn't be avoided when there is ACTUAL medical need.