@inproceedings{c3d670ca3a4144949e2480962ff60ba1,
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.",
author = "Srirang Manohar and Willemink, \{Ren{\'e} G.H.\} and \{Van Leeuwen\}, \{Ton G.\}",
year = "2007",
doi = "10.1117/12.700078",
language = "English",
isbn = "081946550X",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
booktitle = "Photons Plus Ultrasound",
note = "Photons Plus Ultrasound: Imaging and Sensing 2007: The Eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics ; Conference date: 21-01-2007 Through 24-01-2007",
}