Abstract
We present a three-dimensional (3-D) endoscopic optical coherence tomography (OCT) system using a dual axis scanning mirror. The MEMS device employed in this study utilized a 1.2 mm mirror and exhibited x and y-axis resonant frequencies greater than 1 kHz. The developed probe was packaged and integrated with an OCT system which has a scan rate of 3~8 frames/s. Preliminary in vivo and in vitro 3-D OCT images of biological tissue, such as human finger, vocal cord, rabbit trachea, were visualized to verify the achieved performance of the device.
Highlights
Optical coherence tomography (OCT) is a noninvasive imaging modality that permits high resolution, cross-sectional imaging of scattering media in real time [1]
OCT is based on optical coherence reflectometry which is analogous to ultrasound imaging but utilizes a broadband light source instead of sound waves to measure the intensity of backreflection as function of depth in the sample
Most endoscopic OCT has been focused on two dimensional imaging, but 3-D imaging is more ideal for many clinical applications because 3-D imaging can provide clinicians additional visualization and fully spatially realized diagnostic information
Summary
Optical coherence tomography (OCT) is a noninvasive imaging modality that permits high resolution, cross-sectional imaging of scattering media in real time [1]. In order to eliminate this drawback, Pan et al and Zara et al developed a one dimensional scanning (1-D) microelectromechanical system (MEMS) mirror for endoscopic OCT [8,9]. We demonstrate a 3-D endoscopic OCT system using a MEMS based 2 axis scanning mirror [13].
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