体内异常热源参数与体表温度关系的热像研究

摘要

The abnormal inner heat source in human body shows a higher surface temperature in corresponding part area of the body. The higher surface temperature can be detected by the Medical Thermography, which is one of the diagnosis methods for the abnormal inner heat source. But the surface temperature distribution which obtained by the Medical Thermography is hard to reflect the correlative information of the abnormal inner heat source directly. So it is necessary to study the relationship between the information of the heat source including the depth, temperature, thermal properties and surface temperature distribution. This study which is based on bio-heat transfer equation builds a finite element analysis model to analyze the influence of the different factors of the inner heat source to the surface temperature distribution of human body. A developed thermostatically but adjustable heat source was buried in the layered biological tissue, and the Medical Thermography was used to record the temperature distribution of each biological tissue layer. Then, the inside and outside temperature distribution was given, and the theory simulation is validated by the physical experiment. The results show that the surface temperature distribution is primarily affected by the depth of the inner heat source, which provides a theoretical and experimental basis for the thermal technology of inner abnormal heat source diagnosis.%人体内异常热源的位置信息在体表上表现为对应部位温度较高.体表温度可以通过医用红外热像仪摄取,这是诊断体内异常热源的方法之一.但是其摄取的体表温度分布并不能直接反应体内异常热源位置等信息,因此对热源深度、温度、热物性等参数与体表温度分布之间相互关系的研究是非常必要的.该文基于生物热传导方程,通过建立有限元模型,仿真分析了体内热源参数对体表温度分布的影响；将研制的温度可调的恒温热源埋于分层生物组织内,并以红外热像仪摄取各层生物组织的温度,给出体内、体表温度场的分布,对理论仿真结果进行实验验证.研究结果表明,体表温度分布与体内热源深度的关联性最大,为体内异常热源诊断的热像技术研究提供理论与实验依据.