Wednesday, January 28, 2009

Thermography Standards

Thermography outlines thermal heat distribution on the human body.


Thermography is a form of heat scanning. A thermogram is a result of the thermography process. The thermogram maps out the distribution of heat on a body or object.


Uses


Thermography is often used in the medical field. A thermogram of a body may reveal metabolic issues.


Types


Two forms of technology can register and create a thermogram. An electronic infrared camera is a camera with two infrared lasers that aim at an object. The camera computes and combines both laser results to form a thermogram image. The other form is a liquid crystal camera that contains cholesteric methyl-ester derivatives. The crystals react to heat by changing color. A thermogram is developed by taking a picture and having the crystals react to the heat.


Requirements


A thermogram is most accurate when the temperature is around 18 to 23 degrees Celsius, or 64 to 73 degrees Fahrenheit. Also, the humidity or air moisture level of an environment must be low. With no moisture and a stable temperature, a thermography expert may present an accurate thermogram of the human body or of an object.







Tags: body object, crystals react, crystals react heat, human body, react heat