Model of light propagation in cerebrospinal fluid for brain function measurement

Author

Iwasaki, Atsushi ; Hayashi, Toshiyuki ; Okada, Eiji

Author_Institution

Dept. of Electron. & Electr. Eng., Keio Univ., Japan

fYear

2003

fDate

20-22 Oct. 2003

Firstpage

318

Lastpage

319

Abstract

The direct hybrid Monte Carlo-diffusion method (DHMDM) has been used to calculate the light propagation in the head model with a low-scattering CSF layer. In calculation of the DHMDM, the surface radiance to the CSF layer should be replaced by the light source for Monte-Carlo calculation of light propagation in the CSF layer. In this study, the influence of asymmetric distribution of the surface radiance toward the CSF layer on the light propagation in the head model is investigated to improve the accuracy of the DHMDM. The light propagation in the head model with thin superficial layer is considerably affected by the asymmetric of the surface radiance. The model considering the asymmetric of the surface radiance in calculation of light propagation in the CSF layer by Monte-Carlo calculation improves the accuracy of DHMDM.

Keywords

Monte Carlo methods; bio-optics; brain models; light propagation; light scattering; Monte-Carlo calculation; brain function measurement; cerebrospinal fluid; head model; light propagation; low-scattering CSF layer; near-infrared imaging; near-infrared spectroscopy; surface radiance; Biomedical optical imaging; Brain modeling; Head; Light scattering; Light sources; Monte Carlo methods; Optical propagation; Optical scattering; Particle scattering; Scalp;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Engineering, 2003. IEEE EMBS Asian-Pacific Conference on

Print_ISBN

0-7803-7943-8

Type

conf

DOI

10.1109/APBME.2003.1302712

Filename

1302712