Signal processing in scanning thermoacoustic tomography in biological tissues

Xu, Yuan and Wang, Lihong V. (2001) Signal processing in scanning thermoacoustic tomography in biological tissues. Medical Physics, 28 (7). pp. 1519-1524. ISSN 0094-2405. https://resolver.caltech.edu/CaltechAUTHORS:20170203-140443612

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Abstract

Microwave-induced thermoacoustic tomography was explored to image biological tissues. Short microwave pulses irradiated tissues to generate acoustic waves by thermoelastic expansion. The microwave-induced thermoacoustic waves were detected with a focused ultrasonic transducer to obtain two-dimensional tomographic images of biological tissues. The dependence of the axial and the lateral resolutions on the spectra of the signals was studied. A reshaping filter was applied to the temporal piezoelectric signals from the transducer to increase the weight of the high-frequency components, which improved the lateral resolution, and to broaden the spectrum of the signal, which enhanced the axial resolution. A numerical simulation validated our signal-processing approach.

Item Type:

Article

Related URLs:

URL	URL Type	Description
http://dx.doi.org/10.1118/1.1380436	DOI	Article
http://onlinelibrary.wiley.com/doi/10.1118/1.1380436/abstract	Publisher	Article

ORCID:

Author	ORCID
Xu, Yuan	0000-0001-9326-2197
Wang, Lihong V.	0000-0001-9783-4383

Additional Information:

© 2001 American Association of Physicists in Medicine. Received 12 December 2000; accepted for publication 27 March 2001. We thank G. Ku for experimental assistance. This project was sponsored in part by the U.S. Army Medical Research and Materiel Command Grant No. DAMD17-00-1-0455, the National Institutes of Health Grants No. R01 CA71980 and No. R21 CA83760, the National Science Foundation Grant No. BES-9734491, and Texas Higher Education Coordinating Board Grant No. ARP 000512-0123-1999.

Funders:

Funding Agency	Grant Number
Army Medical Research and Materiel Command	DAMD17-00-1-0455
NIH	R01 CA71980
NIH	R21 CA83760
NSF	BES-9734491
Texas Higher Education Coordinating Board	ARP 000512-0123-1999

Subject Keywords:

microwave; ultrasonics; thermoacoustics; tomography; resolution; filter

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Record Number:

CaltechAUTHORS:20170203-140443612

Persistent URL:

https://resolver.caltech.edu/CaltechAUTHORS:20170203-140443612

Official Citation:

Xu, Y. and Wang, L. V. (2001), Signal processing in scanning thermoacoustic tomography in biological tissues. Med. Phys., 28: 1519–1524. doi:10.1118/1.1380436

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No commercial reproduction, distribution, display or performance rights in this work are provided.

ID Code:

74039

Collection:

CaltechAUTHORS

Deposited By:

Tony Diaz

Deposited On:

03 Feb 2017 23:38

Last Modified:

03 Oct 2019 16:34

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