Title :
3-D spatial sensitivity profiles of head model in near-infrared spectroscopy
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Japan
fDate :
29 Oct-1 Nov 1998
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE
Conference_Location :
Hong Kong
Print_ISBN :
0-7803-5164-9
DOI :
10.1109/IEMBS.1998.746958
