16 July 2015 Speed-of-sound correction for photoacoustic and laser-ultrasound imaging with an integrating cylindrical detector
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Abstract
A method based on a modified inverse Radon transform is presented to correct photoacoustic and laser-ultrasound section images taken with a cylindrical integrating detector for heterogeneity in the speed of sound. Data for the correction are obtained with a laser ultrasound transmission method, providing two-dimensional maps of the speed of sound distribution. Photoacoustic, laser ultrasound and speed of sound tomography are combined in a single setup using illumination of the sample and several external absorbers with short pulses from a single laser source. The performance of the corrected reconstruction is compared in a simulation and a phantom experiment with a reconstruction using an average, constant sound speed. In this comparison, the reconstruction using the modified inverse Radon transform shows a small but distinguishable improvement.
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Guenther Paltauf, Guenther Paltauf, Gerhild Wurzinger, Gerhild Wurzinger, Robert Nuster, Robert Nuster, } "Speed-of-sound correction for photoacoustic and laser-ultrasound imaging with an integrating cylindrical detector", Proc. SPIE 9539, Opto-Acoustic Methods and Applications in Biophotonics II, 953917 (16 July 2015); doi: 10.1117/12.2183873; https://doi.org/10.1117/12.2183873
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