Phosphorescence lifetime imaging in turbid media: the forward problem

Area of Science:

• Biomedical optics
• Photon transport modeling
• Medical imaging physics

Background:

• Accurate modeling of near-infrared (NIR) light propagation is crucial for non-invasive imaging of biological tissues.
• Existing models may not fully capture the complexities of light scattering in dense tissues.
• Luminescent inhomogeneities within tissues require precise light propagation descriptions for detection.

Purpose of the Study:

• To present an improved method for modeling the forward problem of NIR light propagation in highly scattering media.
• To enhance the accuracy of simulations for optical imaging applications in biological tissues.
• To provide a more robust theoretical framework for understanding light-tissue interactions.

Main Methods:

• Developed an improved modeling approach based on the telegraph equation for light propagation.
• Derived and analyzed asymptotic solutions of the telegraph equation.
• Obtained an analytical expression for the mean photon path length in scattering media.

Main Results:

• The telegraph equation provides an effective framework for describing NIR light propagation.
• Asymptotic solutions offer valuable insights into light transport dynamics.
• The derived mean photon path length expression aids in quantitative analysis.

Conclusions:

• The proposed telegraph equation-based model offers enhanced accuracy for NIR light propagation in scattering tissues.
• This improved model facilitates better imaging of luminescent inhomogeneities.
• The findings contribute to advancements in biomedical optics and optical imaging technologies.