Optical properties of normal and thermally coagulated chicken liver tissue measured ex-vivo with diffuse reflectance

Hafeez-Ullah,; Firdous, S.; Mehmood, Malik Sajjad; Hamza, Muhammad; Imran, Muhammad; Hussain, Gulzar; Ikram, Manzoor

doi:10.1134/s0030400x11020093

Cited by 24 publications

(16 citation statements)

References 24 publications

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“…Results reported by Hafeez-Ullah [22] on a 1 cm thick normal liver chicken at 810 nm pulsed laser showed a value of scattering coefficient equals to 2.6 mm −1 and absorption coefficient equals to 0.12 mm −1 , while our obtained value of

μ_{a}

at this wavelength was 0.85 mm −1 and

μ_{s}

was 2.13 mm −1 , the variance in

μ_{a}

could be due to different blood contents. No results were reported by [22] for 635 nm and no calculations were made to predict the anisotropy value. Instead, assumed value of

g = 0.8

was used.…”

Section: Discussioncontrasting

confidence: 54%

A Method for Medical Diagnosis Based on Optical Fluence Rate Distribution at Tissue Surface

et al. 2017

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Optical differentiation is a promising tool in biomedical diagnosis mainly because of its safety. The optical parameters' values of biological tissues differ according to the histopathology of the tissue and hence could be used for differentiation. The optical fluence rate distribution on tissue boundaries depends on the optical parameters. So, providing image displays of such distributions can provide a visual means of biomedical diagnosis. In this work, an experimental setup was implemented to measure the spatially-resolved steady state diffuse reflectance and transmittance of native and coagulated chicken liver and native and boiled breast chicken skin at 635 and 808 nm wavelengths laser irradiation. With the measured values, the optical parameters of the samples were calculated in vitro using a combination of modified Kubelka-Munk model and Bouguer-Beer-Lambert law. The estimated optical parameters values were substituted in the diffusion equation to simulate the fluence rate at the tissue surface using the finite element method. Results were verified with Monte-Carlo simulation. The results obtained showed that the diffuse reflectance curves and fluence rate distribution images can provide discrimination tools between different tissue types and hence can be used for biomedical diagnosis.

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μ_{a}

at this wavelength was 0.85 mm −1 and

μ_{s}

was 2.13 mm −1 , the variance in

μ_{a}

could be due to different blood contents. No results were reported by [22] for 635 nm and no calculations were made to predict the anisotropy value. Instead, assumed value of

g = 0.8

was used.…”

Section: Discussioncontrasting

confidence: 54%

A Method for Medical Diagnosis Based on Optical Fluence Rate Distribution at Tissue Surface

et al. 2017

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“…A fixed amount 0.69% (weight/volume) of 1.4 μm polystyrene microsphere (PMS) were added which caused the refractive index matching effect [14]. The refractive index of water was used as ~1.33 and scattering coefficient, was calcu lated from Mie theory at 1310 nm to be 100 cm -1 [15,16] as described previously in our work [17] of light distribution in rat skin and liver from different scatter ing particles such as stratum corneum, stratum spino sum, stratum granulosum, and stratum basele [19,20]. This phantom set (1) served as the "simplest" set.…”

Section: Sample Preparationmentioning

confidence: 99%

M-mode swept source optical coherence tomography for quantification of salt concentration in blood: An in vitro study

et al. 2012

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We report the use of M mode swept source optical coherence tomography (SS OCT) for measur ing sodium chloride (NaCl) salt concentrations in liquid phantoms and in drawn whole blood based on tem poral dynamics of light scattering. The Brownian motion of scattering particle is affected due to the change in viscosity of liquid. An autocorrelation function was determined from the power spectrum of SS OCT signal and then was fit by mono and double exponential function to obtain decorrelation time. These translational decorrelation times corresponding to translational diffusion coefficients enabled us to find the controlled vis cosity of the medium. The viscosities of the media were compared with literature values and a fair/excellent agreement was observed. Thus, the technique has ability to quantify the salt levels in terms of viscosity in non flowing medium suspensions and many research routes necessary to determine its potential for in vivo appli cations.

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“…During coagulation the optical properties change, which has been experimentally investigated. 73 Blood perfusion plays a key role in determining the temperature distribution during laser-induced thermotherapy. The thermal infl uence of perfusion has been investigated both theoretically and experimentally.…”

Section: Laser Selective Photothermolysis and Hyperthermia Of Cancer:mentioning

confidence: 99%

Cancer laser therapy using gold nanoparticles

Terentyuk¹,

Maksimova²,

Дихт³

et al. 2013

Lasers for Medical Applications

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Optical properties of normal and thermally coagulated chicken liver tissue measured ex-vivo with diffuse reflectance

Cited by 24 publications

References 24 publications

A Method for Medical Diagnosis Based on Optical Fluence Rate Distribution at Tissue Surface

A Method for Medical Diagnosis Based on Optical Fluence Rate Distribution at Tissue Surface

M-mode swept source optical coherence tomography for quantification of salt concentration in blood: An in vitro study

Cancer laser therapy using gold nanoparticles

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