Speed-of-sound correction for photoacoustic and laser-ultrasound imaging with an integrating cylindrical detector

Guenther Paltauf; Gerhild Wurzinger; Robert Nuster

doi:10.1117/12.2183873

16 July 2015 Speed-of-sound correction for photoacoustic and laser-ultrasound imaging with an integrating cylindrical detector

Guenther Paltauf, Gerhild Wurzinger, Robert Nuster

Author Affiliations +

Proceedings Volume 9539, Opto-Acoustic Methods and Applications in Biophotonics II; 953917 (2015) https://doi.org/10.1117/12.2183873
Event: European Conferences on Biomedical Optics, 2015, Munich, Germany

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.

Citation Download Citation

Guenther Paltauf, Gerhild Wurzinger, and 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); https://doi.org/10.1117/12.2183873

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