Developement of the non-invasive deep-body temperature measuring method by reflected Ultrasouna

目前在测量身体温度面的许多问题中使用的温度和温度。例如，在高温温度计中测量点和变位的数量有限的问题。这些问题是必要的非侵入性温度测量。当超声波通过生物材料传播时，它的物理参数就像温度一样不同的干扰和速度。在这些参数中，由于现有的B模式设备的干扰是最实际的，因此可以使用来分析反射超声波信号的干扰。本研究的目的是展示基于以上原则的非侵入性温度测量方法的可能性。在生物学方面、结构放松过程，以及适当的放松时间分配和对视觉的贡献，增加衡量的注意力协调。由于视觉和放松过程与温度有关，因此视觉效率和放松时间在不同温度、相对地、视觉效率和放松时间是温度的一个功能。从某种意义上说，温度将通过估计的适应性协同参数间接测量。对于基本的研究，使用猪活体、猪填充物、牛肉活体和牛肉Muscles进行了体外实验。一种用于分析attenuation afficient的温度依赖性是一种光谱差异方法。在37-46 C are in the order of -.006 to -.011 dB/（cm. MHZ. K）。在体内的实验使用猪鳄鱼也显示了消极的依赖性。通过一个更精确的仪器和信号处理，加上对组织兴趣的温度相关性的初步已知特征，有可能通过这个方法来衡量组织的温度，而不是受影响。

Present uses of thermocouple and thermistor in measuring body temperature face many problems. For example, the problem of limited number of measured points and metastasis in hyperthermia thermometry. These problems necessitate non-invasive temperature measurement. When ultrasound propagated through biological material, its physical parameters such as attenuation and velocity vary with temperafure. Among these parameters, attenuation seems the most practical since the existing B-mode device can be used to analyze the attenuation of reflected ultrasonic signal. The purpose of this study is to show the possibility of non-invasive temperature measurement method based on the above principle.In biological tissuse, structural relaxation processes, with an appropriate distribution of relaxation times and the contribution due to viscosity, give rise to the measured attenuation coefficient. Because viscosity and relaxation processes are related to the temperature through viscosity coefficient and relaxation times at different temperature, respectively, the attenuation coefficient is a function of temperature. Consequently, the temperature will be measured indirectly by estimating attenuation coefficient parameter.For basic study, the in vitro experiments using pig livers, pig fillets, beef livers and beef muscles were investigated. The technique used to analyze the temperature dependence of attenuation cofficient is the spectral-difference method. The experimental results indicate that the temperature dependences of attenuation coefficients of liver and muscle in the temperature range of 37-46゜C are in the order of -.006 to -.011 dB/(cm.MHz.K). In vivo experiment using pig liver also shows the negative dependency. By a more accurate instrumentation and signal processing, with preliminary known characteristics of the temperature dependences of attenuation coefficients of the tissuse of interest, it is possible to measure the tissue temperature non-invasively by this method.