Are fluroscopes safe?

I have had four back surgeries. The first was in 1982, when the old procedure was used. Endoscopy had not yet been invented. Muscles were cut, in order to reach my blown disc. My back muscles have never been the same, since. Constant pain. Now, I am told I have scar tissue over my spine and back muscles. New surgery, to remove the scar tissue, is of no use. Doctors want to inject numbing medicene into my spine for my pain relief. This will require the use of a fluroscope to aid the doctor and his needle. Question: are fluroscopes safe to use and will this procedure be a benefit for me in reducing my lower back pain?