Ultrasound-transmission parameter imaging in a photoacoustic imager

Jose, J. and Willemink, R. and Resink, S.G. and Maalderink, T. and Hespen van, J.C.G. and Leeuwen van, T.G. and Manohar, S. (2009) Ultrasound-transmission parameter imaging in a photoacoustic imager. In: Novel Optical Instrumentation for Biomedical Applications IV. Proceedings of SPIE, 7371 . SPIE/OSA, 73710S. ISBN 9780819476470

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Abstract:	We present a 'hybrid' imaging system, which can image both optical absorption properties and acoustic transmission properties of an object in a two-dimensional slice using a computed tomography photoacoustic imager. The ultrasound transmission measurement 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. Such measurements are made at various angles around the sample in a computerized tomography approach. The ultrasound transients at the multi-element detector at all projections are analyzed for both times-of-arrival and amplitude. Using a fan-beam projection reconstruction algorithm we obtain hybrid images of optical absorption, speed-of-sound and acoustic attenuation. We validate the method on an appropriate phantom
Item Type:	Book Section
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS) Science and Technology (TNW)
Research Group:	Signals and Systems (SAS) Biomedical Photonic Imaging (BMPI)
Link to this item:	http://purl.utwente.nl/publications/77736
Official URL:	http://dx.doi.org/10.1117/12.831732
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