Samulski T V, Lyons B E, Britt R H
Int J Radiat Oncol Biol Phys. 1985 May;11(5):963-71. doi: 10.1016/0360-3016(85)90119-1.
Measurement errors associated with thermal conduction along a temperature probe in regions of high thermal gradients are examined. An analysis of a conducting probe inserted into an insulating catheter for the purpose of temperature mapping gives a means for estimating the effects of thermal smearing on the measured distribution. A comparison is made between the theory and an experimental test case (flow cell-thermal step gradient). Also, an iterative algorithm is developed to correct thermally smeared temperature distributions in order to reconstruct the desired unsmeared distributions. The algorithm is checked for self consistency in the flow cell experiment and is applied to in vivo data obtained during interstitial microwave heating in normal dog brain. Data from flow cell measurements are used to make relative comparisons of the probe conduction artifact for several different temperature probes (2 thermocouple needle probes, a thermistor needle probe and an optical probe) and assorted teflon catheters (16, 18 and 20 ga).
研究了在高热梯度区域中沿温度探头的热传导相关的测量误差。对插入绝缘导管以进行温度测绘的导电探头进行分析，得出了一种估计热涂抹对测量分布影响的方法。将理论与一个实验测试案例（流动池 - 热阶跃梯度）进行了比较。此外，还开发了一种迭代算法来校正热涂抹的温度分布，以重建所需的未涂抹分布。在流动池实验中检查了该算法的自洽性，并将其应用于正常犬脑间质微波加热期间获得的体内数据。流动池测量数据用于对几种不同的温度探头（2种热电偶针式探头、1种热敏电阻针式探头和1种光学探头）以及各种特氟龙导管（16号、18号和20号）的探头传导伪影进行相对比较。
