Termografia Biometria

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3D Thermography Imaging Standardization Technique for Inflammation Diagnosis
Xiangyang Ju1Jean-Christophe Nebel2 J. Paul Siebert1 Department of Computing Science, University of Glasgow, Glasgow G12 8QQ, UK1 Digital Imaging Research Centre, School of Computing & Information Systems, Kingston University Kingston upon Thames, Surrey, KT1 2EE, UK2
{xju@dcs.gla.ac.uk j.nebel@kingston.ac.uk psiebert@dcs.gla.ac.uk}

ABSTRACT
We develop a 3D thermography imaging standardization technique to allowquantitative data analysis. Medical Digital Infrared Thermal Imaging is very sensitive and reliable mean of graphically mapping and display skin surface temperature. It allows doctors to visualise in colour and quantify temperature changes in skin surface. The spectrum of colours indicates both hot and cold responses which may co-exist if the pain associate with an inflammatory focus excites anincrease in sympathetic activity. However, due to thermograph provides only qualitative diagnosis information, it has not gained acceptance in the medical and veterinary communities as a necessary or effective tool in inflammation and tumor detection. Here, our technique is based on the combination of visual 3D imaging technique and thermal imaging technique, which maps the 2D thermography images on to3D anatomical model. Then we rectify the 3D thermogram into a view independent thermogram and conform it a standard shape template. The combination of these imaging facilities allows the generation of combined 3D and thermal data from which thermal signatures can be quantified. Keywords: Thermography, Thermogram Standardization, 3D imaging, Inflammation

1. INTRODUCTION
All objects with atemperature above absolute zero emit infrared radiation defined by the Stefan-Boltzmann Law which states that the total radiation emitted by an object is directly proportional to the object’s area and emissivity and the fourth power of its absolute temperature. Medical Digital Infrared Imaging, otherwise known as clinical thermography is based on a careful analysis of skin surface temperatures as areflection of normal or abnormal human physiology. For nearly half a century research has been conducted on humans [6] and animals [12] showing the correlation between temperature patterns and medical conditions. The temperature of an area of the body is a product of cell metabolism and local blood flow and increases in temperature are usually the result of an increase in these factors, although bloodflow plays the major role. With some disease processes there is a reduction in blood flow to the affected tissues and this will also result in alterations in surface temperature. In particular extensive research has studied skin surface temperature associated with breast cancer. In 1963, Lawson and Chughtai published a study demonstrating that the increase in regional skin surface temperatureassociated with breast cancer was related to both increased vascular flow and increased metabolism [7]. In 1982, thermography was approved by the U.S. Food and Drug Administration (FDA) as a supplement to mammography in helping to detect breast cancer. Though thermography is FDA approved, this procedure, which is cheap and non-invasive no radiation or intravenous injection is used – (examinationscould be performed as often as indicated), has not gained acceptance in the medical and veterinary communities as a necessary or effective tool in inflammation and tumour detection. Thermographic examination must be conducted in a rigorously controlled environment to prevent the introduction of artifacts. First of all, they must be able to stand up and corroborate the evidence provided by more...