@inproceedings{1fa9ef830cbf4e70b28468f24d5ff0a5,
title = "Speed-of-sound imaging in a photoacoustic imager",
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.",
keywords = "EWI-11965, IR-62179, METIS-243213",
author = "Srirang Manohar and Rene Willemink and {van der Heijden}, Ferdinand and {van Leeuwen}, Ton and Slump, {Cornelis H.}",
year = "2007",
month = feb,
day = "13",
doi = "10.1117/12.700078",
language = "Undefined",
isbn = "978-0-8194-655-04",
series = "Proceedings of SPIE",
publisher = "SPIE",
pages = "64370",
editor = "A.A. Oraevsky and L.V. Wang",
booktitle = "Photons Plus Ultrasound: Imaging and Sensing: The eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics",
address = "United States",
note = "Photons Plus Ultrasound: Imaging and Sensing 2007 ; Conference date: 13-02-2007 Through 15-02-2007",
}