Estimation of partial optical path length in the brain in subject-specific head models for near-infrared spectroscopy

Kotaro Nakamura, Kazuki Kurihara, Hiroshi Kawaguchi, Takayuki Obata, Hiroshi Ito, Eiji Okada

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    Three-dimensional head models with the structures constructed from the MR head images of 40 volunteers were constructed to analyze light propagation in the subject-specific head models. The mean optical path length in the head and the partial optical path length in the brain at 13 fiducial points for each volunteer were estimated to evaluate the intersubject and spatial variability in the optical path lengths. Although the intersubject variability in the optical path lengths is very high, the spatial variability in the average of the mean optical path length and partial optical path length is similar to the previously reported data. The mean optical path length in the head increases, whereas the partial optical path length in the brain decreases with an increase in the depth of the brain surface. The partial optical path length is highly correlated with the depth of the brain surface in comparison to the mean optical path length in the head.

    Original languageEnglish
    Pages (from-to)316-322
    Number of pages7
    JournalOptical Review
    Volume23
    Issue number2
    DOIs
    Publication statusPublished - 2016 Apr 1

    Keywords

    • Anatomical head model
    • Mean optical path length
    • Near-infrared spectroscopy
    • Partial optical path length

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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