<prompt> Maximum radiation exposureX-ray abdomenChest X rayIV pyelographyBarium Enema  <response>: X-ray abdomen- Single spot film, therefore comparatively less radiation exposure. Chest X ray- Single spot film, therefore comparatively less radiation exposure. IV pyelography- Sequential multiple imaging but covers less area, therefore, comparatively less radiation exposure. Barium Enema- Sequential multiple imaging, covers larger area. therefore comparatively maximum radiation exposure. PET CT - Has highest radiation exposure. Diagnostic Procedure Typical Effective Dose Chest RadiographPA 0.02msv Extremities limbs 0.01msv Skull 0.07msv pelvis 0.7msv Abdomen 1.0msv Mammography bilateral in 2 planes 0.5msv Intravenous pyelography 2.5msv Head Ct 2.3msv Chest CT 8 Abdominal CT 10 PET 7.2msv Barium Enema 7-8msv 