title: Two-axis MEMS Scanning Catheter for Ultrahigh Resolution Three-dimensional and En Face Imaging.
abstract: Ultrahigh resolution two and three-dimensional optical coherence tomography (OCT) imaging was performed using a miniaturized, two-axis scanning catheter based upon microelectromechanical systems (MEMS) mirror technology. The catheter incorporated a custom-designed and fabricated, 1-mm diameter MEMS mirror driven by angular vertical comb (AVC) actuators on both an inner mirror axis and an outer, orthogonal gimbal axis. Using a differential drive scheme, a linearized position response over +/- 6 degrees mechanical angle was achieved. The flexible, fiber-optic catheter device measured < 5 mm in outer diameter with a rigid length of ~ 2.5 cm at the distal end. In vivo and ex vivo images are presented with < 4 microm axial and ~ 12 microm transverse resolution in tissue.
authors.forename: Aaron D
authors.initials: AD
authors.lastname: Aguirre
authors.forename: Paul R
authors.initials: PR
authors.lastname: Hertz
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.forename: James G
authors.initials: JG
authors.lastname: Fujimoto
authors.forename: Wibool
authors.initials: W
authors.lastname: Piyawattanametha
authors.forename: Li
authors.initials: L
authors.lastname: Fan
authors.forename: Ming C
authors.initials: MC
authors.lastname: Wu