Abstract 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$^{\circ}$C with an accuracy of $\pm $2$\,^{\circ}$C.
Received: 29 July 2006
Revised: 14 January 2007
Accepted manuscript online:
(Mechanical and electrical properties of tissues and organs)
Fund: Project supported by the National Natural
Science Foundation of China (Grant No~10474044) and the Program for New Century
Excellent Talents in University of China (CNCET).
Cite this article:
Ma Yong(马勇), Zhang Dong(章东), Gong Xiu-Fen(龚秀芬), Liu Xiao-Zhou(刘晓宙), Ma Qing-Yu(马青玉), and Qiu Yuan-Yuan(邱媛媛) Noninvasive temperature estimation by detecting echo-strain change including thermal expansion 2007 Chinese Physics 16 2745
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