Thermoacoustic and photoacoustic sensing of temperature

被引:174
作者
Pramanik, Manojit [1 ]
Wang, Lihong V. [1 ]
机构
[1] Washington Univ, Dept Biomed Engn, Opt Imaging Lab, St Louis, MO 63130 USA
基金
美国国家卫生研究院;
关键词
thermoacoustics; photoacoustics; temperature sensing; tissue phantom; tissue temperature; IN-VIVO; BIOLOGICAL TISSUES; TOMOGRAPHY; TIME; BLOOD; CT;
D O I
10.1117/1.3247155
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
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 degrees C was obtained at a temporal resolution as short as 2 s, 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. (C) 2009 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3247155]
引用
收藏
页数:7
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