SCOTT CAMAZINE / SCIENCE PHOTO LIBRARY SCOTT CAMAZINE / SCIENCE PHOTO LIBRARY
Healthy heart. Coloured X-ray of the healthy heart (red) and lungs of a 7-year-old girl. The position and size of the heart is superimposed over the ribcage. Chest X-rays can be used to diagnose diseases of the heart, such as myocarditis (inflamed heart muscle) or of the lungs, such as pneumonia.
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