title: Forward imaging OCT endoscopic catheter based on MEMS lens scanning.
abstract: This Letter reports a fully packaged microelectromechanical system (MEMS) endoscopic catheter for forward imaging optical coherence tomography (OCT). Two-dimensional optical scanning of Lissajous patterns was realized by the orthogonal movement of two commercial aspherical glass lenses laterally mounted on two resonating electrostatic MEMS microstages at low operating voltages. The MEMS lens scanner was integrated on a printed circuit board and packaged with an aluminum housing, a gradient index fiber collimator, and an objective lens. A home-built spectral-domain OCT system with 60 kHz A-line acquisition rate was combined with the endoscopic MEMS catheter. Three-dimensional images of 256×256×995 voxels were directly reconstructed by mapping the A-line datasets along the Lissajous patterns. The endoscopic catheter can provide a new direction for forward endoscopic OCT imaging.
authors: Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea.
authors: Hyeon-Cheol
authors: HC
authors: Park
authors: Cheol
authors: C
authors: Song
authors: Minseok
authors: M
authors: Kang
authors: Yong
authors: Y
authors: Jeong
authors: Ki-Hun
authors: KH
authors: Jeong
mesh_terms: D000818:Animals; D004423:Ear; D004560:Electricity; D004724:Endoscopy / Q000295:instrumentation*; D021621:Imaging, Three-Dimensional; D007909:Lenses; D055595:Mechanical Phenomena; D051379:Mice; D055616:Microtechnology / Q000295:instrumentation*; D041623:Tomography, Optical Coherence / Q000295:instrumentation*