My doctor urged me to have it done being I had cancer three times before and beat it. So I had it done and sure enough they found a tumor a centimeter big and sure enough it was cancer. Five radiation treatments later I am cancer free. This will be the fourth time I have beat cancer. Two very important facts here. They would of never found the tumor with a regular X-ray. The way to beat cancer is early detection. Don't wait till the symptoms show up. Its usually too late by then. I dont care how good you feel, have the low dose CT scan done just to be sure.