Light scattering study of tissues

Transparency, swelling and scarring in the corneal stroma

“…12 A more generalised mathematical review of transparency in biological tissues is by Tuchin. 13 By way of a summary, it has been pointed out by Farrell and McCally 11 that all currently viable transparency theories agree with three points:…”

Theory of Dynamic Pulsatile Spectroscopy for photoplethysmographic signals analysis

“…Concept of the light pulse propagation delay experiment in a scattering media with absorption [6]. Fig.…”

“…Such envelopes can be obtained by light scattering modeling on the homogeneous, plain, and semi-infinite media models utilizing the Monte Carlo method to solve the light radiation transfer equation. It might also be obtained by measuring the light radiant intensities at various points within the matter sample volume in-vitro [6].…”

“…Photon energy is proportional to the light wavelengths and the proportionality coefficient is the Plank constant. Additional postulates used in BLNLP were deduced by analysis of the following physical models: Beer-Lambert law, Monte Carlo light scattering modeling and light energy transport integral equation [6].…”

Towards Conformal Interstitial Light Therapies: Modelling Parameters, Dose Definitions and Computational Implementation

“…The MCML implementation assumes infinitely wide layers, each of which is described by its thickness and its optical properties, comprising the absorption coefficient, scattering coefficient, anisotropy factor, and refractive index. A diagram illustrating the propagation of photon packets in a multi-layered skin geometry (Tuchin, 1997) is shown in Figure 2, using ASAP (Breault Research Organization, Tucson, AZ) as the MC simulation tool to trace the paths of photons (ASAP -Getting Started Guide, 2009). In the MCML code, three physical quantities -absorption, reflectance, and transmittance -are calculated in a spatially-resolved manner.…”