Medical Thermography is a system using a non-contact infrared camera to record temperature variations on the skin, the largest organ of the body. The surface of the skin is directly influenced by vascular activity, including micro-circulation, below the surface via the sympathetic nervous system. Thermography does NOT see or diagnose cancer. These patterns of activity vary in intensity and distribution over each body region, represented by images with variation in colours. Changes of these patterns allow for the recognition of asymmetric, abnormal or suspicious thermal patterns over a specific area or region of interest – for example, the difference between the thermal pattern on each breast, and may be recognised by the interpreter as abnormal physiology or function.