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Research Papers

Thermoacoustic and photoacoustic sensing of temperature

[+] Author Affiliations
Manojit Pramanik, Lihong V. Wang

Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, Campus Box 1097, One Brookings Drive, St. Louis, Missouri 63130

J. Biomed. Opt. 14(5), 054024 (April 23, 2009July 07, 2009August 06, 2009October 12, 2009). doi:10.1117/1.3247155
History: Received April 23, 2009; Revised July 07, 2009; Accepted August 06, 2009; Published October 12, 2009
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We present a novel temperature-sensing technique using thermoacoustic and photoacoustic measurements. This noninvasive method has been demonstrated using a tissue phantom to have high temporal resolution and temperature sensitivity. Because both photoacoustic and thermoacoustic signal amplitudes depend on the temperature of the source object, the signal amplitudes can be used to monitor the temperature. A temperature sensitivity of 0.15°C was obtained at a temporal resolution as short as 2s, taking the average of 20 signals. The deep-tissue imaging capability of this technique can potentially lead us to in vivo temperature monitoring in thermal or cryogenic applications.

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© 2009 Society of Photo-Optical Instrumentation Engineers

Citation

Manojit Pramanik and Lihong V. Wang
"Thermoacoustic and photoacoustic sensing of temperature", J. Biomed. Opt. 14(5), 054024 (April 23, 2009July 07, 2009August 06, 2009October 12, 2009). ; http://dx.doi.org/10.1117/1.3247155


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