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Proceedings Paper

Breast cancer imaging by microwave-induced thermoacoustic tomography
Author(s): Minghua Xu; Geng Ku; Xing Jin; Lihong V. Wang; Bruno D. Fornage; Kelly K. Hunt
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Paper Abstract

We report a preliminary study of breast cancer imaging by microwave-induced thermoacoustic tomography. In this study, we built a prototype of breast cancer imager based on a circular scan mode. A 3-GHz 0.3~0.5-μs microwave is used as the excitation energy source. A 2.25-MHz ultrasound transducer scans the thermoacoustic signals. All the measured data is transferred to a personal computer for imaging based on our proposed back-projection reconstruction algorithms. We quantified the line spread function of the imaging system. It shows the spatial resolution of our experimental system reaches 0.5 mm. After phantom experiments demonstrated the principle of this technique, we moved the imaging system to the University of Texas MD Anderson Cancer Center to image the excised breast cancer specimens. After the surgery performed by the physicians at the Cancer Center, the excised breast specimen was placed in a plastic cylindrical container with a diameter of 10 cm; and it was then imaged by three imaging modalities: radiograph, ultrasound and thermoacoustic imaging. Four excised breast specimens have been tested. The tumor regions have been clearly located. This preliminary study demonstrated the potential of microwave-induced thermoacoustic tomography for applications in breast cancer imaging.

Paper Details

Date Published: 25 April 2005
PDF: 4 pages
Proc. SPIE 5697, Photons Plus Ultrasound: Imaging and Sensing 2005: The Sixth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, (25 April 2005); doi: 10.1117/12.589128
Show Author Affiliations
Minghua Xu, Texas A&M Univ. (United States)
Geng Ku, Texas A&M Univ. (United States)
Xing Jin, Texas A&M Univ. (United States)
Lihong V. Wang, Texas A&M Univ. (United States)
Bruno D. Fornage, The Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Kelly K. Hunt, The Univ. of Texas M.D. Anderson Cancer Ctr. (United States)


Published in SPIE Proceedings Vol. 5697:
Photons Plus Ultrasound: Imaging and Sensing 2005: The Sixth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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