A heart computed tomography (CT) scan uses X-rays to create detailed images of your heart. The test can help doctors evaluate the structure and function of the heart and the surrounding blood vessels.

Angela Ryan Lee, MD, FACC, is a board-certified cardiology and internal medicine physician. She also holds board certifications from the American Society of Nuclear Cardiology and the National Board ...

A Z-score compares your bone density to what's normal for your age and can signal secondary osteoporosis. A low Z-score means your bones may be thinning due to another health problem or certain ...