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Proceedings Paper

Photoacoustic and thermoacoustic imaging with a multichannel breast scanner
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Paper Abstract

Photoacoustic and thermoacoustic phantom images obtained with a multi-channel breast scanner designed for breast cancer screening are presented here. A tunable laser system (OPOTEK Vibrant 355 I, Calsbad,CA) with a pulse duration of 5 ns was used for photoacoustic irradiation, and a 3.0 GHz microwave source with a pulse width of 0.3-1 μs was used for thermoacoustic tomography. Multiple (>=16) 2.25 MHz single-element unfocused ultrasonic transducers at different depths were scanned simultaneously for a full 360° to obtain a full data set for three-dimensional (3D) tomography. Negative acoustic lenses were attached to these unfocused transducers to increase their acceptance angles. An ultrasound receiving system with 64 parallel receiving channels (Verasonics Inc. Redmond, WA) was used for data acquisition. A filtered backprojection algorithm was used to reconstruct two-dimensional (2D) and 3D images. Different phantoms were imaged to evaluate the performance of the scanner. A lateral resolution of less than 1 mm and an elevational resolution of less than 5 mm were achieved. The phantom studies demonstrate that this scanner can potentially provide high-resolution, dual-modality, three-dimensional images and can potentially be used for human breast cancer screening.

Paper Details

Date Published: 23 February 2012
PDF: 7 pages
Proc. SPIE 8223, Photons Plus Ultrasound: Imaging and Sensing 2012, 822309 (23 February 2012); doi: 10.1117/12.906779
Show Author Affiliations
Bin Huang, Washington Univ. in St. Louis (United States)
Konstantin Maslov, Washington Univ. in St. Louis (United States)
Lihong V. Wang, Washington Univ. in St. Louis (United States)

Published in SPIE Proceedings Vol. 8223:
Photons Plus Ultrasound: Imaging and Sensing 2012
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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