中国物理B ›› 2007, Vol. 16 ›› Issue (9): 2745-2751.doi: 10.1088/1009-1963/16/9/041

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

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

马勇, 章东, 龚秀芬, 刘晓宙, 马青玉, 邱媛媛   

  1. Institute of Acoustics, Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2006-07-29 修回日期:2007-01-14 出版日期:2007-09-20 发布日期:2007-09-20
  • 基金资助:
    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).

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

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)   

  1. Institute of Acoustics, Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China
  • Received:2006-07-29 Revised:2007-01-14 Online:2007-09-20 Published:2007-09-20
  • Supported by:
    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).

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摘要： 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.

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.

Key words: echo-strain, noninvasive temperature estimation, therapeutic ultrasound

中图分类号:  (Therapeutic applications)

  • 87.50.yt
87.19.Pp (Biothermics and thermal processes in biology) 87.19.R- (Mechanical and electrical properties of tissues and organs)