高功率短脉冲激光照射下生物组织内的热传导研究  

Experimental Study on Heat Conduction in Biological TissueIrradiated by High-Power Short-Pulse Laser

作　　者：周建华[1] 刘登瀛[1] 徐建中[1] 淮秀兰[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080

出　　处：《西安交通大学学报》2002年第7期684-687,共4页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目 (5 9736 130 ) ;国家重点基础研究发展规划资助项目 (G2 0 0 0 0 2 6 30 5 )

摘　　要：采用响应时间为 1μs的超小型薄膜铂热电阻温度计及日本YOKOGAWADL2 70 0高速数字示波器 ,对微秒量级脉冲激光照射下离体动物组织内的热传导进行了实验研究 .结果发现 :在激光脉宽较短时 ,组织内出现了非傅里叶导热现象 ;脉宽越短 ,组织厚度越薄 ,非傅里叶导热特征越明显 ;功率密度和光斑直径只影响温度上升的高低 ,对是否会出现非傅里叶导热没有影响 .The heat conduction in biological tissue irradiated by high power short pulse laser was investigated experimentally. The micro scale film resistance thermometer with 1 microsecond response time was used to measure temperature. The output of the film resistance thermometer was recorded dynamically by a YOKOGAWA DL2700 digital oscilloscope. The experimental results show that, when the pulse duration is short, the heat conduction in biological tissue is of non Fourier behavior. The shorter the pulse duration is and the thinner the biological tissue is, the more notable the non Fourier heat conduction is. The power density and spot size will influence the maximum value of temperature during laser heating, and have nothing to do with the problem whether the non Fourier heat conduction can take place.

关 键 词：热传导 高功率短脉冲激光 生物组织 非傅里叶导热 热效应 温度测量 

分 类 号：Q631[生物学—生物物理学] TK124[动力工程及工程热物理—工程热物理]