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We developed an improved signal and image processing of optoacoustic data collected by our laser optoacoustic
imaging system designed for breast cancer detection (LOIS-B). The implemented wavelet-based signal processing
allowed significant reduction of the low-frequency acoustic noise, improved contrast and localization of the optoacoustic
sources of interest. The system was able to differentiate phantoms mimicking breast tumors based on the contrast and
morphology of their images. The implemented wavelet-based signal processing also facilitated high (0.5 mm) resolution
of the phantoms mimicking parallel blood vessels in the presence of large-amplitude low-frequency acoustic artifacts.
The application of the 3D radial back projection image reconstruction algorithm allowed visulaization of the tumor
phantoms located beyond the imaging slice of the arc-shaped array of transducers. The visualization of slices parallel to
the array of transducers with individual adjustment of the image palette for each particular slice eliminated the image
artifacts caused by the large gradient of the laser fluence orthogonal to the array of transducers.
Sergey A. Ermilov,Reda Gharieb,Andre Conjusteau,Tom Miller,Ketan Mehta, andAlexander A. Oraevsky
"Data processing and quasi-3D optoacoustic imaging of tumors in the breast using a linear arc-shaped array of ultrasonic transducers", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 685603 (28 February 2008); https://doi.org/10.1117/12.770321
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Sergey A. Ermilov, Reda Gharieb, Andre Conjusteau, Tom Miller, Ketan Mehta, Alexander A. Oraevsky, "Data processing and quasi-3D optoacoustic imaging of tumors in the breast using a linear arc-shaped array of ultrasonic transducers," Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 685603 (28 February 2008); https://doi.org/10.1117/12.770321