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.
| 元の言語 | English |
|---|---|
| 記事番号 | 062108 |
| ジャーナル | Journal of Biomedical Optics |
| 巻 | 12 |
| 発行部数 | 6 |
| DOI | |
| 出版物ステータス | Published - 2007 11 1 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Biomaterials
- Atomic and Molecular Physics, and Optics
- Biomedical Engineering
これを引用
Comparison of light intensity on the brain surface due to laser exposure during optical topography and solar irradiation. / Kiguchi, Masashi; Ichikawa, Noriyoshi; Atsumori, Hirokazu; Kawaguchi, Fumio; Satou, Hiroki; Maki, Atsushi; Koizumi, Hideaki.
：: Journal of Biomedical Optics, 巻 12, 番号 6, 062108, 01.11.2007.研究成果: Article
}
TY - JOUR
T1 - Comparison of light intensity on the brain surface due to laser exposure during optical topography and solar irradiation
AU - Kiguchi, Masashi
AU - Ichikawa, Noriyoshi
AU - Atsumori, Hirokazu
AU - Kawaguchi, Fumio
AU - Satou, Hiroki
AU - Maki, Atsushi
AU - Koizumi, Hideaki
PY - 2007/11/1
Y1 - 2007/11/1
N2 - 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.
AB - 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.
KW - Laser safety
KW - NIRS
KW - Optical topography
KW - Photon-diffusion equation
UR - http://www.scopus.com/inward/record.url?scp=37549041269&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=37549041269&partnerID=8YFLogxK
U2 - 10.1117/1.2804152
DO - 10.1117/1.2804152
M3 - Article
C2 - 18163811
AN - SCOPUS:37549041269
VL - 12
JO - Journal of Biomedical Optics
JF - Journal of Biomedical Optics
SN - 1083-3668
IS - 6
M1 - 062108
ER -