Liquid crystal thermography of a healthy back

Liquid crystal thermography of a healthy back

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Credit: ALFRED BENJAMIN/SCIENCE PHOTO LIBRARY

Caption: Healthy back. Liquid crystal thermogram of the torso of a woman patient with a healthy back. The distribution of colours and their symmetrical patterns is the thermographic method used here to diagnose whether tissues are normal. The area is painted black, then a clear liquid (cholesteric) crystal solution is sprayed over. The crystals are affected by temperature variations of skin and tissue and change colour. Blue/green shows good blood flow; red/black shows cooler areas. Blood flow is normal across the back down to the lower spine. Patterns of colour are largely symmetrical. A cooler (black) area is seen around the hips but this does not constitute a large surface area.

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Keywords: back, healthy, liquid crystal, liquid crystal thermography, thermogram, thermograph, thermography

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