Here are typicak xray dosese for exams. Ca scoring followed by a CT coroanry angiogram is about the equivalent of a CT of the chest abdomen and pelvis. EBCT is typically 1/4 the dose and 4 times the price...lol.
Average annual radiation exposure from natural causes.....................360 mrem Cross Country Plane Trip..... 6 mrem One Week Ski Vacation..... 1-2 mrem
Conventional X-ray Exams Two View Chest X-ray....6 mrem Lateral Lumbar Spine X-ray....70 mrem Mammogram......45 mrem DXA: Hip or Spine...1-6 mrem DXA: Wrist or Heel..1 mrem