An Experimental investigation on the temperature dependence of ultrasonic signal characterization in a phantom tissue

Authors : Esra Demirkıran, Serhan Küçüka

Pages : 28-35

Doi:10.55974/utbd.1673381

View : 75 | Download : 81

Publication Date : 2025-12-29

Article Type : Research Paper

Abstract :Thermal ablation techniques, which use various methods such as high-intensity ultrasonic heating, ohmic heating, microwave heating, and radiofrequency, are promising in effectively destroying tumor tissues. On the other hand, instantaneous temperature measurement in and around the target area during thermal therapy will facilitate the application of such treatments. A method for instantly determining temperature changes in tissues based on the change in ultrasound signals sent to the target. In this method, the temperature change in the tissue is calculated inversely based on the change in the speed of sound and the duration of flight. However, impurities and noise in the tissue make it difficult to monitor the change in the signal returning from the target area. In this study, silica gel- and silicon dioxide-added agar phantoms were prepared as tissue-like materials. The prepared phantoms were immersed in a water bath and heated, and the temperature changes in the phantom were measured using immersion sensors. On the other hand, ultrasonic signals were sent to the phantom structure throughout the process, and the changes in the return signals were observed. The results obtained by processing the changes in the signals show that the change in flight time can be used to determine the temperature change inside the phantom.
Keywords : Termal terapi, Tümör ablasyonu, Doku sıcaklığı izleme, Darbe-yankı ultrason, Doku benzeri malzeme

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