Exact photoacoustic image reconstruction using a planar sensor array and image sources

Benjamin T. Cox; Paul C. Beard

doi:10.1117/12.700006

13 February 2007 Exact photoacoustic image reconstruction using a planar sensor array and image sources

Benjamin T. Cox, Paul C. Beard

Proceedings Volume 6437, Photons Plus Ultrasound: Imaging and Sensing 2007: The Eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; 64371H (2007) https://doi.org/10.1117/12.700006
Event: SPIE BiOS, 2007, San Jose, California, United States

Abstract

Photoacoustic imaging with planar sensor arrays suffers from a finite aperture or limited view problem due to the fact that the sensor array is finite in size, whereas exact reconstruction algorithms require that it occupies the entire infinite plane. Here, acoustic reflectors are proposed as a means of reflecting the acoustic waves, that would otherwise not be measured, back onto the sensor, and it is shown that an existing FFT-based image reconstruction algorithm can be used to reconstruct an image in this case without modification. A 2D simulation is used to show the improvement in the image quality when data from the reverberant field is included in the reconstruction. The improvement is explained by the matching of the periodicity implicitly assumed by the FFT algorithm and the periodicity in the virtual initial pressure distribution formed from the real initial pressure distribution and an infinite line of image sources generated by the acoustic reflectors.

Citation Download Citation

Benjamin T. Cox and Paul C. Beard "Exact photoacoustic image reconstruction using a planar sensor array and image sources", Proc. SPIE 6437, Photons Plus Ultrasound: Imaging and Sensing 2007: The Eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 64371H (13 February 2007); https://doi.org/10.1117/12.700006

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