Measurement of ultrasonically modulated scattered light for imaging in turbid media

Glen W. Brooksby; Carl Murray Penney

doi:10.1117/12.210003

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30 May 1995 Measurement of ultrasonically modulated scattered light for imaging in turbid media

Glen W. Brooksby, Carl Murray Penney

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Proceedings Volume 2389, Optical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation; (1995) https://doi.org/10.1117/12.210003
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

The concept of ultrasonic tagging of light is investigated as a possible modality for imaging human tissue with nonionizing radiation. Experiments were performed to detect the presence of ultrasonically tagged light in an optically scattering medium. Experiments with a doubled Nd:YAG laser incident on a tank filled with water and varying concentrations of 3 micrometers diameter latex microspheres showed that the doppler phase modulation due to Brownian motion as well as a phase modulation due to the presence of focused CW ultrasound were both observable using heterodyne detection of the scattered light. The experimental apparatus is described and data are presented for the detected ultrasonically modulated signal level versus particle concentration.

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Glen W. Brooksby and Carl Murray Penney "Measurement of ultrasonically modulated scattered light for imaging in turbid media", Proc. SPIE 2389, Optical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation, (30 May 1995); https://doi.org/10.1117/12.210003

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