Noninvasive temperature estimation by detecting echo-strain change including thermal expansion

作者：Ma Yong; Zhang Dong^*; Gong Xiu Fen; Liu Xiao Zhou; Ma Qing Yu; Qiu Yuan Yuan

来源：Chinese Physics, 2007, 16(9): 2745-2751.

• echo-strain
• noninvasive temperature estimation
• therapeutic ultrasound

This article studies the feasibility of noninvasive temperature estimation by detecting echo-strain including thermal expansion in therapeutic ultrasound treatment. This technique evaluates distributions of echo-strain and temperature inside the tissue by detecting echo signals pre- and post-heating, in combination with the temperature dependence of sound speed and thermal expansion. In the computer simulation and experimental study, echo signals pre- and post-heating are acquired and then the temperature elevation is evaluated by correlation analysis. Results demonstrate that this technique can effectively extend the measured temperature range up to 75 degrees C with an accuracy of +/- 2 degrees C.

• 出版日期2007-9
• 单位南京大学