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Lt. Co.l (Dr.) Chris Thompson, chief cardiologists at the David Grant USAF Medical Center Cardiovascular Diagnostic Department, evaluates heart images taken by Staff Sgt. David E. Dionne, Cardiopulmonary Laboratory Technologist and Cardiac Sonographer, using the iE33 cardiac ultrasound system. Ultrasound uses high-frequency sound waves to produce moving images of the body?s internal soft tissue structures. (U.S. Air Force photo/Master Sgt. Austin Delacruz)
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