Open AccessUltra-fast multispectral optical imaging of cortical oxygenation, blood flow, and intracellular calcium dynamics
Author(s) -
Michael J. Bouchard,
Brenda R. Chen,
Sean A. Burgess,
Elizabeth M. C. Hillman
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.015670
Subject(s) - multispectral image , optics , frame rate , fluorescence lifetime imaging microscopy , materials science , image resolution , temporal resolution , wavelength , oxygenation , fluorescence , physics , computer science , computer vision , medicine , anesthesia
Camera-based optical imaging of the exposed brain allows cortical hemodynamic responses to stimulation to be examined. Typical multispectral imaging systems utilize a camera and illumination at several wavelengths, allowing discrimination between changes in oxy- and deoxyhemoglobin concentration. However, most multispectral imaging systems utilize white light sources and mechanical filter wheels to multiplex illumination wavelengths, which are slow and difficult to synchronize at high frame rates. We present a new LED-based system capable of high-resolution multispectral imaging at frame rates exceeding 220 Hz. This improved performance enables simultaneous visualization of hemoglobin oxygenation dynamics within single vessels, changes in vessel diameters, blood flow dynamics from the motion of erythrocytes, and dynamically changing fluorescence.