17 March 2014 Diffusion model for ultrasound-modulated light
Author Affiliations +
J. of Biomedical Optics, 19(3), 035005 (2014). doi:10.1117/1.JBO.19.3.035005
Abstract
Researchers use ultrasound (US) to modulate diffusive light in a highly scattering medium like tissue. This paper analyzes the US–optical interaction in the scattering medium and derives an expression for the US-modulated optical radiance. The diffusion approximation to the radiative transport equation is employed to develop a Green’s function for US-modulated light. The predicted modulated fluence and flux are verified using finite-difference time-domain simulations. The Green’s function is then utilized to illustrate the modulated reflectance as the US–optical interaction increases in depth. The intent of this paper is to focus on high US frequencies necessary for high-resolution imaging because they are of interest for applications such as phase conjugation.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Joseph L. Hollmann, Roarke Horstmeyer, Changhuei Yang, Charles A. DiMarzio, "Diffusion model for ultrasound-modulated light," Journal of Biomedical Optics 19(3), 035005 (17 March 2014). http://dx.doi.org/10.1117/1.JBO.19.3.035005
JOURNAL ARTICLE
12 PAGES


SHARE
KEYWORDS
Modulation

Diffusion

Scattering

Laser beam diagnostics

Finite-difference time-domain method

Light scattering

Laser scattering

Back to Top