A coronary calcium scan is a very safe procedure; however, it does involve radiation and should be used only when it can provide valuable information about heart attack risk such as on patients at intermediate risk according to their Framingham Risk Score. It requires significantly less radiation than a coronary angiogram or a nuclear stress test.
Because a coronary calcium scan uses radiation, it’s not recommended during pregnancy. Be sure to notify your doctor if you’re—or may be—pregnant. Also, if you’ve undergone many tests or procedures that involve radiation in the past, please inform your doctor.