exposure to radiation exposure to radiation exposure to radiation exposure to radiation CDC: Ionizing Radiation and Diagnostic Examinations exposure to radiation CDC: Ionizing Radiation and Diagnostic Examinations Fluoroscopy CT or CAT (computed tomography) scans exposure to radiation Radiation and Your Health exposure to radiation PET (positron emission tomography) scans low-dose computed tomography exposure to radiation exposure to radiation X-rays Radiation in Medicine: Medical Imaging Procedures