Comparison of light intensity on the brain surface due to laser exposure during optical topography and solar irradiation

Masashi Kiguchi, Noriyoshi Ichikawa, Hirokazu Atsumori, Fumio Kawaguchi, Hiroki Sato, Atsushi Maki, Hideaki Koizumi

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Optical topography (OT), which is based on the near-infrared spectroscopy, is a powerful tool for observing brain activity noninvasively. To estimate the effect of laser exposure on the brain, photon-distribution profiles in bald heads of adults and neonates during the OT were calculated using the photon-diffusion equation. These calculations showed that although the absolute values of the intensity depend on details of the head model, the relative values of OT exposure to sunlight exposure were less sensitive to the model details. As an example, the light intensities on the brain surface during OT obtained by using a commercially available system were about 2% for adults and 3% for neonates of those values obtained under midday sunlight on a sunny day in midsummer. These values were obtained under the reasonable assumptions with a large safety factor.

本文言語English
論文番号062108
ジャーナルJournal of biomedical optics
12
6
DOI
出版ステータスPublished - 2007 11
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering

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