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Endoscopic Functional Fourier Domain Common Path Optical
Coherence Tomography for Microsurgery
Prof. Jin U. Kang
The Johns Hopkins University
|Day and Time
Tuesday, September 15, 2009, 3:00 p.m.
||Room GB 244, Galbraith Building
University of Toronto
35 St. George Street
map - select GB
IEEE Circuits & Devices Chapter
Emanuel Istrate, E-mail:
All are welcome. Refreshments will be served.
A single-arm interferometer based optical coherence tomography (OCT)
system known as common-path OCT (CPOCT) is rapidly progressing towards
practical applications. Due in part to the simplicity and robustness
of its design, Fourier Domain CPOCT (FD-CP-OCT) is being adopted for
many endoscopic sensing and imaging applications. FD-CP-OCT uses
simple, interchangeable fiber optic probes that are easily integrated
into small and delicate surgical tools. The system is capable of
providing not only high resolution imaging but also optical sensing.
Here, we report progress towards practical applications of FD-CP-OCT
in the setting of delicate microsurgical procedures such as
intraocular retinal surgery. To meet the challenges presented by the
microsurgical requirements of these procedures, we have developed and
initiated the validation of applicable fiber optic probes. By
integrating these probes into our developing imaging system, we have
obtained high resolution OCT images and have also completed a
demonstration of their potential sensing capabilities. Specifically,
we utilize multiple SLEDs to demonstrate sub 3-micron axial resolution
in water; we propose a technique to quantitatively evaluate the
spatial distribution of oxygen saturation levels in tissue; and we
present evidence supportive of the technology’s surface sensing and
tool guidance potential by demonstrating topological and motion
compensation capabilities. The fundamentals of OCT will also be
reviewed to accommodate audience from a broad spectrum.
Jin U. Kang is a Professor and Chair of the Department of Electrical
and Computer Engineering, The Johns Hopkins University, Baltimore,
MD. He joined the department as an assistant professor in 1998.
Previously, he was a Research Engineer with the U.S. Naval Research
Laboratory, Washington, DC. He received the Ph.D. degree in
electrical engineering and optical sciences from the University of
Central Florida in 1996. His current research interests include fiber
optic sensors and imaging systems, novel fiber laser systems, and bio-photonics.