Female breast. Thermogram of a side view through a woman's healthy breast. A thermogram records infrared radiation that is given off as a measure of its temperature. Temperature is colour-coded: hottest regions are light colours (pink to white); coolest regions are from green, blue to purple. Here, the surface of the breast appears hottest and radiates most heat; deeper tissue is cooler. A breast thermogram may be used to detect constrictions in blood vessels (cold) or cancerous tumours (hot).
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