DAVID MONTROSE / CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY DAVID MONTROSE / CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
Man dancing. Thermogram of the head and torso of a male ballet dancer dancing, with his lungs also visible. A thermogram records infrared radiation that is given off by the skin as a measure of its temperature. The colour-codes represent hottest regions of the body: white, yellow to red; coolest regions are from blue, purple to black. A white outline of the man's hot lungs can be seen in his chest. Probably due to sweating with exercise, his head and torso appear cool (black). Skin temperature may reflect the volume of blood supply across parts of the body, and can highlight a variety of circulatory dysfunctions.
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