New study ct scan will cause cancer but 70 million got cts in america even me?

There is no way to guarantee you will get cancer from it. Your list of info says the risk is higher due to overexposure. That does not mean you will definitely get it. It means you are more likely. Any procedure involving radiation comes with risk. X-Rays can cause cancer too which is why when you get one everything not being x-rayed is covered in a lead lined sheet. Generally, when used appropriately, these procedures' benefits outweigh the risks.