Speed-of-sound imaging in a photoacoustic imager

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6 Citations (Scopus)

Abstract

The effects of an inappropriately chosen speed-of-sound in photoacoustic imaging reconstructions are to cause blurring of images and impairment of contrast. Here we outline a new methodology to measure the speed-of-sound in a photoacoustic imager with little or no additional cost and without the need to perform extra measurements. The method uses a strong absorber of light which is placed in the path of the light illuminating the sample. This acts as a source of ultrasound whose interaction with the sample can be measured at the far-end of the sample using the same ultrasound detector used for photoacoustics. This yields time-of-arrival measurements of the ultrasound transient at the multi-element detector. Such measurements are made at various angles around the sample in a computerized tomography approach. Reconstruction of the time-of-arrival or speed-of-sound tomogram of the object can be made by implementing a fan-beam projection reconstruction algorithm. We present the concept and validate the method on a speed-of-sound phantom.
Original languageUndefined
Title of host publicationPhotons Plus Ultrasound: Imaging and Sensing: The eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics
EditorsA.A. Oraevsky, L.V. Wang
Place of PublicationSan Jose
PublisherSPIE - The International Society for Optical Engineering
Pages64370
Number of pages8
ISBN (Print)978-0-8194-655-04
DOIs
Publication statusPublished - 13 Feb 2007
EventPhotons Plus Ultrasound: Imaging and Sensing 2007: 8th Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics - San Jose, United States
Duration: 13 Feb 200715 Feb 2007

Publication series

NameProceedings of SPIE
PublisherThe International Society for Optical Engineering
Volume6437
ISSN (Print)0277-786X

Conference

ConferencePhotons Plus Ultrasound: Imaging and Sensing 2007
CountryUnited States
CitySan Jose
Period13/02/0715/02/07

Keywords

  • EWI-11965
  • IR-62179
  • METIS-243213

Cite this

Manohar, S., Willemink, R., van der Heijden, F., van Leeuwen, T., & Slump, C. H. (2007). Speed-of-sound imaging in a photoacoustic imager. In A. A. Oraevsky, & L. V. Wang (Eds.), Photons Plus Ultrasound: Imaging and Sensing: The eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics (pp. 64370). [10.1117/12.700078] (Proceedings of SPIE; Vol. 6437). San Jose: SPIE - The International Society for Optical Engineering. https://doi.org/10.1117/12.700078