Noninvasive temperature estimation by detecting echo-strain change including thermal expansion |
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| Authors: | Ma Yong Zhang Dong Gong Xiu-Fen Liu Xiao-Zhou Ma Qing-Yu and Qiu Yuan-Yuan |
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| Affiliation: | Institute of Acoustics, Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China |
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| 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. |
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| Keywords: | echo-strain noninvasive temperature estimation therapeutic ultrasound |
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