3-D spatial sensitivity profiles of head model in near-infrared spectroscopy

Author

Okada, Eiji

Author_Institution

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

Volume

4

fYear

1998

fDate

29 Oct-1 Nov 1998

Firstpage

1868

Abstract

The heterogeneity of tissue scattering makes determination of sampling volume of near infrared spectroscopy (NIRS) instruments difficult. The 3-D spatial sensitivity profiles, which indicate the volume of tissue sampled by an NIRS instrument, in the head models are predicted by the Monte Carlo method. The spatial sensitivity profile is strongly affected by the clear cerebrospinal fluid (CSF) surrounding the brain. In the model with the CSF, the spatial sensitivity profile spreads over an extensive area in the brain surface between the source and detector but it is confined to a shallow region in the brain

Keywords

Monte Carlo methods; bio-optics; biological tissues; brain models; infrared spectroscopy; inhomogeneous media; light scattering; oximetry; photon transport theory; 3D spatial sensitivity profiles; Monte Carlo method; brain shallow region; cerebral oxygenation change; clear cerebrospinal fluid; head model; layered slab model; near-infrared spectroscopy; photon propagation; sampling volume; tissue scattering heterogeneity; Brain modeling; Detectors; Infrared spectra; Instruments; Light scattering; Optical propagation; Optical scattering; Optical sensors; Particle scattering; Predictive models;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE

Conference_Location

Hong Kong

ISSN

1094-687X

Print_ISBN

0-7803-5164-9

Type

conf

DOI

10.1109/IEMBS.1998.746958

Filename

746958