肿瘤热疗中的超声无损测温技术

肿瘤热疗中组织温度的测定和监控至关重要。利用诊断超声波扫描热疗生物组织，通过分析超声回波信号的时间延迟、频域共振峰的频移或计算散射回波的能量可以无创伤地提取组织温度信息，与时域或频域方法比较，从能量的角度分析超声回波信号无损伤提取深部组织的温度信息的方法，具有随温度改变能量特征变化明显，易提取温度信息等优点，文中讨论了当前热疗中温度测量的难点和新技术。

Noninvasive Estimation of Tissue Temperature in Hyperthermia Using Diagnostic Ultrasound

Hyperthermia is one of the important techniques in tumor treatments. Temperature estimating and monitoring is the key technique in hyperthermia. In this paper, a new nonivasive temperature estimation method based on backscattered ultrasonic power is introduced. Compared with the techniques based on echo-shift and frequency-shift, this method has its advantage for application. The change of backscattered power caused by the temperature change is conspicuous and easy to measure. The new techniques and difficulties in this field are also addressed.