Time-resolved optical imager for assessment of cerebral oxygenation

Michal Kacprzak; Adam Liebert; Piotr Leszek Sawosz; Norbert S. Zolek; Roman Maniewski

doi:10.1117/1.2743964

1 May 2007 Time-resolved optical imager for assessment of cerebral oxygenation

Michal Kacprzak, Adam Liebert, Piotr Leszek Sawosz, Norbert S. Zolek, Roman Maniewski

Author Affiliations +

Journal of Biomedical Optics, Vol. 12, Issue 3, 034019 (May 2007). https://doi.org/10.1117/1.2743964

Abstract

A time-resolved optical instrument allowing for noninvasive assessment of cerebral oxygenation is presented. The instrument is equipped with picosecond diode lasers, fast photodetectors, and time-correlated single photon counting electronics. This technology enables depth-resolved estimation of changes in absorption and, in consequence, assessment of changes in hemoglobin concentrations in the brain cortex. Changes in oxyhemoglobin (HbO₂) and deoxyhemoglobin (Hb) can be evaluated selectively in extra- and intracerebral tissue compartments using the moments of distributions of times of flight of photons measured at two wavelengths in the near-infrared region. The combination of the data acquired from multiple sources and detectors located on the surface of the head with the depth-resolved analysis, based on the moments, enables imaging of cortex oxygenation. Results of the tests on physical phantoms as well as in vivo validation of the instrument during the motor stimulation experiment are presented.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Michal Kacprzak, Adam Liebert, Piotr Leszek Sawosz, Norbert S. Zolek, and Roman Maniewski "Time-resolved optical imager for assessment of cerebral oxygenation," Journal of Biomedical Optics 12(3), 034019 (1 May 2007). https://doi.org/10.1117/1.2743964

Published: 1 May 2007

ACCESS THE FULL ARTICLE

JOURNAL ARTICLE
14 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY