Title :
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
fDate :
30 Oct-2 Nov 1997
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-4262-3
DOI :
10.1109/IEMBS.1997.757739
