Propagation of polarized light in turbid media: simulated animation sequences

Yao, Gang; Wang, Lihong V.

doi:10.1364/oe.7.000198

Cited by 59 publications

(31 citation statements)

References 13 publications

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“…A volume concentration of 0.12% was used in the study with calculated scattering coefficient of 41cm -1 and anisotropy (the g-parameter) of 0.93. The Mueller matrix images obtained in the polystyrene solution are similar as those reported before [20][21][22][23]. The M11 component of the Mueller matrix represents the unpolarized measurements.…”

Section: Resultssupporting

confidence: 79%

Polarization-sensitive reflectance imaging in skeletal muscle

Li¹,

Ranasinghesagara²,

Yao³

2008

Opt. Express

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Abstract:We acquired polarization-sensitive reflectance images in freshly excised skeletal muscle samples. The obtained raw images varied depending on the incident and detection polarization states. The Stokes vectors were measured for incident light of four different polarization states, and the whole Mueller matrix images were also calculated. We found that the images obtained in skeletal muscles exhibited different features from those obtained in a typical polystyrene sphere solution. The back-reflected light in muscle maintained a higher degree of polarization along the axis perpendicular to muscle fiber orientation. Our analysis indicates that the unique muscle sarcomere structure plays an important role in modulating the propagation of polarized light in whole muscle.

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Section: Resultssupporting

confidence: 79%

Polarization-sensitive reflectance imaging in skeletal muscle

Li¹,

Ranasinghesagara²,

Yao³

2008

Opt. Express

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“…Through theoretical analysis, Rakovic and Kattawar 10 showed that a double-scattering model can effectively emulate the spatial patterns of backscattered light obtained from experiments. Yao and Wang 11 used a time-resolved Monte Carlo technique to present the propagation of polarized light in turbid media. All of the above studies were conducted on isotropic turbid media without considering the birefringent effect on polarizations.…”

Section: Introductionmentioning

confidence: 99%

Propagation of polarized light in birefringent turbid media: A Monte Carlo study

2002

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Abstract. A detailed study, based on a Monte Carlo algorithm, of polarized light propagation in birefringent turbid media is presented in this paper. Linear birefringence, which results from the fibrous structures, changes the single scattering matrix and alters the polarization states of photons propagating in biological tissues. Some Mueller matrix elements of light backscattered from birefringent anisotropic turbid media present unusual intensity patterns compared with those for nonbirefringent isotropic turbid media. This result is in good agreement with the analytic results based on the double-scattering model. Degree of polarization, Stokes parameters, and diffuse reflectance as functions of linearly birefringent parameters based on numerical results and theoretical analysis are discussed and compared in an effort to understand the essential physical processes of polarized light propagation in fibrous tissues.

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“…The two rotating quarter wave plates technique is based upon an operational principle, which involves the modulation of a polarization state for both probing and outcoming light beams as suggested earlier by Azzam [23]. The time-resolved polarimetric imaging technique uses short pulses and time gating to distinguish between multiply scattered and weakly scattered photons where each has a different degree of polarization [24]. Several techniques have been studied to differentiate between weakly scattered and multiply scattered photons.…”

Section: Lc Devices With Applications For Polarimetric Imagingmentioning

confidence: 99%

Biomedical Optical Applications of Liquid Crystal Devices

2007

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Liquid crystals exhibit large electro-optic effects which make them useful for a variety of applications as fast, compact, and tunable spectral filters, phase modulators, polarization controllers, and optical shutters. They were largely developed for liquid crystal displays and in the last decade for optical telecommunications, however their application in the field of optical imaging just started to emerge. These devices can be miniaturized thus have a great potential useful in miniature optical imaging systems for biomedical applications. Using a collection of tunable phase retarders one can perform: 1. Stokes parameters imaging for skin and eye polarimetric imaging; 2. Tunable filtering to be used for hyperspectral imaging, fluorescence microscopy, and frequency domain optical coherence tomography; 3. Adaptive optical imaging and eye aberrations correction; 4. Phase shift interferometric imaging; 5. Variable frequency structured illumination microscopy. Basic optics of liquid crystals devices is reviewed and some novel designs are presented in more detail when combined to imaging systems for a number of applications in biomedical imaging and sensing.

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Propagation of polarized light in turbid media: simulated animation sequences

Cited by 59 publications

References 13 publications

Polarization-sensitive reflectance imaging in skeletal muscle

Polarization-sensitive reflectance imaging in skeletal muscle

Propagation of polarized light in birefringent turbid media: A Monte Carlo study

Biomedical Optical Applications of Liquid Crystal Devices

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