Effect of ultrasound transducer face reflectivity on light fluence distribution inside turbid medium

Behnoosh Tavakoli; Patrick D. Kumavor; Andres Aguirre; Quing Zhu

doi:10.1117/12.847196

23 February 2010 Effect of ultrasound transducer face reflectivity on light fluence distribution inside turbid medium

Behnoosh Tavakoli, Patrick D. Kumavor, Andres Aguirre, Quing Zhu

Proceedings Volume 7564, Photons Plus Ultrasound: Imaging and Sensing 2010; 75643J (2010) https://doi.org/10.1117/12.847196
Event: SPIE BiOS, 2010, San Francisco, California, United States

Abstract

For photoacoustic imaging in reflection geometry, the front-face reflectivity of the ultrasound transducers imposes different boundary conditions on the light fluence distribution inside the tissue. Understanding and characterizing the boundary effects on the fluence distribution is critical for optimizing the light illumination and therefore the signal-tonoise ratio (SNR) of the photoacoustic measurements. Monte Carlo (MC) simulations were performed to quantify the fluence distribution under different reflectivity boundary conditions and the results were validated by experiments. It is demonstrated that the light fluence obtained due to a highly reflective boundary, for instance, white-colored transducer face, is higher and more uniformly distributed than that of lower reflectivity boundaries such as red, gray, or black face colors. Both simulations and experiments were performed with near-infrared (NIR) light as the illumination source.

Citation Download Citation

Behnoosh Tavakoli, Patrick D. Kumavor, Andres Aguirre, and Quing Zhu "Effect of ultrasound transducer face reflectivity on light fluence distribution inside turbid medium", Proc. SPIE 7564, Photons Plus Ultrasound: Imaging and Sensing 2010, 75643J (23 February 2010); https://doi.org/10.1117/12.847196

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