Experimental study of the potential of multichannel acoustic thermotomography

Eugene V. Krotov; S. Yu. Xenophontov; Anatoly D. Mansfeld; Alexander M. Reyman; A. G. Sanin

doi:10.1117/12.429295

15 June 2001 Experimental study of the potential of multichannel acoustic thermotomography

Eugene V. Krotov, S. Yu. Xenophontov, Anatoly D. Mansfeld, Alexander M. Reyman, A. G. Sanin

Proceedings Volume 4256, Biomedical Optoacoustics II; (2001) https://doi.org/10.1117/12.429295
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

Abstract

The results of experimental studies of 2D temperature profiles reconstruction inside soft tissues are presented. The 2D images are obtained as the result of mathematical data processing in multichannel scanning acoustic thermotomograph (AT). Operation of this device is based on the receiving of weak acoustic emission produced by thermal motion of medium particles. The intensity of received signal is proportional to the acoustical brightness temperature of emitting object, i.e. to its temperature and sound absorption. Some evident applications of this method are related with early tumor detection and internal temperature measurement during hyperthermal treatment. This kind of passive scanning provides great safety of investigation combined with rather good spatial resolution due to short wavelength and high directivity of AT antenna. Our experiments demonstrated localization of overheated phantom objects inside tissue-like absorbing media with temperature contrast about 0.4 K and 2 mm resolution at 2D images with area size 210x40 mm. The advantages and possible applications of this kind of clinical investigations are illustrated by the results of in vivo experiments on the variation of acoustic brightness temperature of human limbs and liver during some physiological tests. This work was supported by RFBR (project #00-02-16600).

Citation Download Citation

Eugene V. Krotov, S. Yu. Xenophontov, Anatoly D. Mansfeld, Alexander M. Reyman, and A. G. Sanin "Experimental study of the potential of multichannel acoustic thermotomography", Proc. SPIE 4256, Biomedical Optoacoustics II, (15 June 2001); https://doi.org/10.1117/12.429295

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