ArticleBiomedical optics express2022
Theoretical investigation of photon partial pathlengths in multilayered turbid media.
Article in Biomedical optics express, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 12 citations in OpenAlex.
- Multi-layer self-calibrated algorithm for transabdominal fetal pulse oximetry: simulation andJPhys photonics · 2026Article
- Analytical sensitivity factors from distributions of time of flight of photons for near-infrared spectroscopy studies in multilayered turbid media.https://pubmed.ncbi.nlm.nih.gov/39845728/Journal of biomedical optics · 2025Article
- Retrieval of chromophore concentration changes in a digital human head model using analytical mean partial pathlengths of photons.Journal of biomedical optics · 2024Article
- Self-calibrated pulse oximetry algorithm based on photon pathlength change and the application in human freedivers.Journal of biomedical optics · 2023Article
- Monte Carlo Simulation of Diffuse Optical Spectroscopy for 3D Modeling of Dental Tissues.Sensors (Basel, Switzerland) · 2023Article
- Efficient computation of the steady-state and time-domain solutions of the photon diffusion equation in layered turbid media.Scientific reports · 2022Article
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
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Abstract
Functional near infrared spectroscopy (fNIRS) is a valuable tool for assessing oxy- and deoxyhemoglobin concentration changes (Δ[HbO] and Δ[HbR], respectively) in the human brain. To this end, photon pathlengths in tissue are needed to convert from light attenuation to Δ[HbO] and Δ[HbR]. Current techniques describe the human head as a homogeneous medium, in which case these pathlengths are easily computed. However, the head is more appropriately described as a layered medium; hence, the partial pathlengths in each layer are required. The current way to do this is by means of Monte Carlo (MC) simulations, which are time-consuming and computationally expensive. In this work, we introduce an approach to theoretically calculate these partial pathlengths, which are computed several times faster than MC simulations. Comparison of our approach with MC simulations show very good agreement. Results also suggest that these analytical expressions give much more specific information about light absorption in each layer than in the homogeneous case.
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