DR RAY CLARKE & MERVYN GOFF / SCIENCE PHOTO LIBRARY DR RAY CLARKE & MERVYN GOFF / SCIENCE PHOTO LIBRARY
Thermogram of a profile view of the head & shoulders of a person suffering from rheumatoid arthritis affecting the shoulder joints. A thermogram is a colour-coded map of heat distribution across the body surface. The colour coding shows variation in temperature, ranging in steps from blue-black (coolest) to white (warmest areas). Alterations in skin temperature are characteristic of certain diseases conditions; inflammation in rheumatoid arthritis may give rise to average increase of 2 degrees C. In this image hot spots are scattered over the shoulder.
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