About CTN Research Transcranial Magnetic Stimulation Behavioral Pharmacology & Neuroimaging People Graduate Students / Post-doctorals Research Facilities |
Optical ImagingDr. Congwu Du has developed a catheter-based optical system capable of
measuring changes in the concentration and oxidation states of hemoglobin,
concurrently with calcium Rhod2 fluorescence in the living brain. The
optical instrument comprises a 150-W xenon lamp, a fast excitation
monochromator and photo-counting detectors for fluorescence and diffusion
reflectance. The xenon lamp is connected to a computer-controlled
monochromator to select incident lights of 548, 555 and 572 nm by
time-sharing to sequentially deliver the selected light onto the brain
surface through one arm of a Y-shaped bifurcated fiber optic bundle. The
first data testing the instrument capabilities in a stroke model has recently
been published.
Last Modified: January 31, 2008 |