Noninvasive Estimation of Tissue Temperature in Hyperthermia Using Diagnostic Ultrasound
Niu Jinhai; Zhu Yisheng; Wang Hongzhang(Department of Biomedical Engineering Shanghai Jiaotong University, Shanghai 200030)
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.