含内热源的红外热像的数值模拟

摘要生物组织的热效应引发了人们开展对红外技术医学应用及生物医学传热的研究。通过被动接收人体的红外信号，可以得出人体表温度的分布图像，然后进行定性的疾病诊断，但是并不能直接获得人体内部的温度分布，不能直接确定组织内部病灶部位和大小，所以必须进一步确定体表温度分布与体内热源之间的关系。本文从基本生物传热理论出发，分析体内热源对皮表温度分布的影响，建立组织表面温度的分布模型，分析不同热源参数对组织表面温度的影响。然后通过Pennes生物传热微分方程，使用Monte Carlo方法对该微分方程进行数值求解，分析不同边界条件下所得到的结果，讨论组织表面温度分布与内部异常热源之间的关系。67131

毕业论文关键词红外热像内热源蒙特卡罗算法

毕业设计说明书（论文）外文摘要

Title Numerical Simulation of Infrared Thermography with Internal Heat Source

Abstract The heat effect of biology has brought the research of medical application of infrared technology and biological heat transfer. By passively receives the IR signals of the human body, human body surface temperature distribution image can be drawn and be used to qualitative diagnosis of disease. However the internal temperature distribution of body can not be achieved, and the location and size of the lesion within the tissue can not be directly determined. It is necessary to explore the relationship between surface temperature distribution and the internal heat. In this paper, from the basic biological heat transfer theory, the temperature distribution on the skin surface is analyzed. The tissue surface temperature distribution model is established, and different parameters of heat sources are studied. Then the Pennes’ bio-heat transfer equation is numerically solved by the Monte Carlo method. The different boundary conditions and the relationship between the tissue surface temperature distribution and the abnormal heat source are discussed in detail.

Keywords biological heat; internal heat source; Monte Carlo

1 引言 1

2 内热源对组织表面温度分布影响研究 2

2.1 生物组织内部传热机制 2

2.1.1 导热 2

2.1.2 对流 4

2.2 生物体与环境之间的传热机制 6

2.2.1 对流 6

2.2.2 辐射 7

2.2.3 蒸发散射 9

2.3 点状热源对离体组织表面温度分布的影响 10

2.3.1 理论分析 10

2.3.2 数值模拟 11

2.3.3 影响因素 12

2.4 球状热源对离体组织表面温度分布的影响 13

2.4.1 理论分析 13

2.4.2 数值模拟 15

2.4.3 影响因素 17

3 蒙特卡罗法获取生物组织体内温度分布 19

3.1 理论模型 20

3.2 数学模拟 22

3.2.1 一维验证 22

3.2.2 三维模拟与分析含内热源的红外热像的数值模拟:http://www.751com.cn/wuli/lunwen_75226.html