Correlation transfer and diffusion of ultrasound-modulated multiply scattered light

被引:0
|
作者
Sakadzic, Sava [1 ]
Wang, Lihong V. [1 ]
机构
[1] Texas A&M Univ, Dept Biomed Engn, Opt Imaging Lab, College Stn, TX 77843 USA
来源
PHOTONS PLUS ULTRASOUND: IMAGING AND SENSING 2006 | 2006年 / 6086卷
关键词
ultrasound-modulated optical tomography; multiply scattered light; correlation transfer equation; diffusion approximation; turbid medium;
D O I
10.1117/12.645282
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
We develop a temporal correlation transfer equation (CTE) and a temporal correlation diffusion equation (CDE) for ultrasound-modulated multiply scattered light, which can be used to calculate the ultrasound-modulated optical intensity in an optically scattering medium with a nonuniform ultrasound field and a heterogeneous distribution of optical parameters. We present an analytical solution based on the CDE for scattering of the temporal autocorrelation function from a cylinder of ultrasound in an optically scattering slab. The CDE is valid for moderate ultrasound pressures on a scale comparable with the optical transport mean free path, which must be greater than the ultrasound wavelength and smaller than or comparable to the sizes of both ultrasonic and optical inhomogeneities. These equations should be applicable to a wide spectrum of conditions for ultrasound-modulated optical tomography of soft biological tissues.
引用
收藏
页数:6
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