摘要
采用阶跃温升法可以测量生物组织热物理参数。本文采用数值实验的方法分析了阶跃温升法测量过程中组织热导率、组织热扩散率、探头半径、探头温度波动和温度测量误差的影响 。
By using step temperature we can measure the thermal properties. In this paper, the effects of the local tissue thermal conductivity k t , tissue thermal diffusion α t , the probe semi diameter, the probe temperature fluctuation and the measurement precision of temperature were analyzed by using numerical experiment. We also presented one way to improve the measurement precision of step temperature technique. The results showed that there were 6%～9% system error in k t and 0～25% system error in α t measured by step temperature technique. The probe semi diameter should be 0.3～0.5mm. The probe temperature fluctuation should be controlled within 0.03℃, and the measurement error of temperature should be kept within 1%.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
2002年第3期263-267,共5页
Chinese Journal of Biomedical Engineering
基金
国家自然科学基金重点基金资助项目 (No .5 983 62 40 )
关键词
生物热物性
阶跃温升法
误差分析
Thermal properties
Bio material
Step Temperature Technique
Error analysis
