MRI's are fine- they carry no radiation whatsoever.X-rays and CT scans both beam radiation inside you, but not radioactive material, so there's no "radiation level" to test after the scan. The important factor is the total radiation dose you receive.You can always ask your doctor if the scans put you at risk and if they outweigh the benefits of the scan. If the doctors know what they are doing, they shouldn't give you any more scans than are necessary.