Radiation in medicine: a double-edged sword.  X-rays, CT scans, and other procedures should be used judiciously.
D003935:Diagnostic Techniques, Cardiovascular / Q000009:adverse effects*; D004307:Dose-Response Relationship, Radiation; D004869:Equipment Safety; D006331:Heart Diseases / Q000175:diagnosis / Q000000981:diagnostic imaging*; D006801:Humans; D011829:Radiation Dosage; D011859:Radiography