Design of a near infrared reflectometer

Author

Pasley, Richard L. ; Wolf, Erich ; Bada, Henrietta ; Leffler, Charles W. ; Daley, Michael L.

Author_Institution

Dept. of Electr. Eng., Memphis Univ., TN, USA

Volume

2

fYear

1997

fDate

30 Oct-2 Nov 1997

Firstpage

729

Abstract

A two channel near infrared reflectometer was designed and fabricated using laser (814 nm and 751 nm) diodes and separate photodiode detector circuits. Because the isosbestic point of HbO₂ and Hb is approximately 814 nm, the gains of each channel were equated at this wavelength. The device is designed to measure relative change of local cerebral blood volume, HbO₂ and Hb concentration in an unknown sample volume

Keywords

biomedical electronics; blood; brain; laser applications in medicine; photodiodes; reflectometers; semiconductor lasers; volume measurement; 751 nm; 814 nm; Hb concentration; HbO₂; O₂; hemoglobin; isosbestic point; laser diodes; local cerebral blood volume; medical instrumentation; photodiode detector circuit; reflectometer design; relative change measurement; two channel near infrared reflectometer; unknown sample volume; Blood; Circuits; Diodes; Infrared detectors; Optical design; Particle scattering; Reflectometry; Signal detection; Volume measurement; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE

Conference_Location

Chicago, IL

ISSN

1094-687X

Print_ISBN

0-7803-4262-3

Type

conf

DOI

10.1109/IEMBS.1997.757739

Filename

757739