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Effects of acoustic heterogeneity in breast thermoacoustic tomography

Xu, Yuan and Wang, Lihong V. (2003) Effects of acoustic heterogeneity in breast thermoacoustic tomography. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 50 (9). pp. 1134-1146. ISSN 0885-3010. doi:10.1109/TUFFC.2003.1235325.

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The effects of wavefront distortions induced by acoustic heterogeneities in breast thermoacoustic tomography (TAT) are studied. Amplitude distortions are shown to be insignificant for different scales of acoustic heterogeneities. For wavelength-scale, or smaller, heterogeneities, amplitude distortion of the wavefront is minor as a result of diffraction when the detectors are placed in the far field of the heterogeneities. For larger-scale heterogeneities at the parenchyma wall, by using a ray approach (geometric optics), we show that no refraction-induced multipath interference occurs and, consequently, that no severe amplitude distortion, such as is found in ultrasound tomography, exists. Next, we consider the effects of phase distortions (errors in time-of-flight) in our numerical studies. The numerical results on the spreads of point sources and boundaries caused by the phase distortions are in good agreement with the proposed formula. After that, we demonstrate that the blurring of images can be compensated for by using the distribution of acoustic velocity in the tissues in the reconstructions. The effects of the errors in the acoustical velocities on this compensation also are investigated. An approach to implement the compensation using only TAT data is proposed. Lastly, the differences in the effects of acoustic heterogeneity and the generation of speckles in breast TAT and breast ultrasound imaging are discussed.

Item Type:Article
Related URLs:
URLURL TypeDescription
Xu, Yuan0000-0001-9326-2197
Wang, Lihong V.0000-0001-9783-4383
Additional Information:© 2003 IEEE. Manuscript received March 8, 2002; accepted February 25, 2003. This project was sponsored in part by the U.S. Army Medical Research and Material 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 000512-0063-2001.
Funding AgencyGrant Number
Army Medical Research and Materiel CommandDAMD17-00-1-0455
NIHR01 CA71980
NIHR21 CA83760
Texas Higher Education Coordinating Board000512-0063-2001
Issue or Number:9
Record Number:CaltechAUTHORS:20170131-103633376
Persistent URL:
Official Citation:Yuan Xu and L. V. Wang, "Effects of acoustic heterogeneity in breast thermoacoustic tomography," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 50, no. 9, pp. 1134-1146, Sept. 2003. doi: 10.1109/TUFFC.2003.1235325 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73879
Deposited By: Tony Diaz
Deposited On:31 Jan 2017 18:42
Last Modified:11 Nov 2021 05:23

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