期刊
OPTICS EXPRESS
卷 12, 期 22, 页码 5469-5474出版社
OPTICAL SOC AMER
DOI: 10.1364/OPEX.12.005469
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We present a new and simple method to obtain ultrasound modulated optical tomography images in thick biological tissues with the use of a photorefractive crystal. The technique offers the advantage of spatially adapting the output speckle wavefront by analysing the signal diffracted by the interference pattern between this output field and a reference beam, recorded inside the photorefractive crystal. Averaging out due to random phases of the speckle grains vanishes, and we can use a fast single photodetector to measure the ultrasound modulated optical contrast. This technique offers a promising way to make direct measurements within the decorrelation time scale of living tissues. (C) 2004 Optical Society of America.
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