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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 26 — Dec. 24, 2007
  • pp: 18130–18140

Two-axis magnetically-driven MEMS scanning catheter for endoscopic high-speed optical coherence tomography

Ki Hean Kim, B. Hyle Park, Gopi N. Maguluri, Tom W. Lee, Fran J. Rogomentich, Mirela G. Bancu, Brett E. Bouma, Johannes F. de Boer, and Jonathan J. Bernstein  »View Author Affiliations

Optics Express, Vol. 15, Issue 26, pp. 18130-18140 (2007)

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A two-axis scanning catheter was developed for 3D endoscopic imaging with spectral domain optical coherence tomography (SD-OCT). The catheter incorporates a micro-mirror scanner implemented with microelectromechanical systems (MEMS) technology: the micro-mirror is mounted on a two-axis gimbal comprised of folded flexure hinges and is actuated by magnetic field. The scanner can run either statically in both axes or at the resonant frequency (>=350Hz) for the fast axis. The assembled catheter has an outer diameter of 2.8 mm and a rigid part of 12 mm in length. Its scanning range is ±20° in optical angle in both axes with low voltages (1~3V), resulting in a scannable length of approximately 1 mm at the surface in both axes, even with the small catheter size. The catheter was incorporated with a multi-functional SD-OCT system for 3D endoscopic imaging. Both intensity and polarization-sensitive images could be acquired simultaneously at 18.5K axial scans/s. In vivo 3D images of human fingertips and oral cavity tissue are presented as a demonstration.

© 2007 Optical Society of America

OCIS Codes
(110.6880) Imaging systems : Three-dimensional image acquisition
(170.2150) Medical optics and biotechnology : Endoscopic imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(350.3950) Other areas of optics : Micro-optics

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: August 15, 2007
Revised Manuscript: October 29, 2007
Manuscript Accepted: October 30, 2007
Published: December 19, 2007

Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics

Ki Hean Kim, B. H. Park, Gopi N. Maguluri, Tom W. Lee, Fran J. Rogomentich, Mirela G. Bancu, Brett E. Bouma, Johannes F. de Boer, and Jonathan J. Bernstein, "Two-axis magnetically-driven MEMS scanning catheter for endoscopic high-speed optical coherence tomography," Opt. Express 15, 18130-18140 (2007)

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