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 75C with an accuracy of 2C.
(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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