title: Miniaturized magnetic-driven scanning probe for endoscopic optical coherence tomography.
abstract: We designed and implemented a magnetic-driven scanning (MDS) probe for endoscopic optical coherence tomography (OCT). The probe uses an externally-driven tiny magnet in the distal end to achieve unobstructed 360-degree circumferential scanning at the side of the probe. The design simplifies the scanning part inside the probe and thus allows for easy miniaturization and cost reduction. We made a prototype probe with an outer diameter of 1.4 mm and demonstrated its capability by acquiring OCT images of ex vivo trachea and artery samples from a pigeon. We used a spectrometer-based Fourier-domain OCT system and the system sensitivity with our prototype probe was measured to be 91 dB with an illumination power of 850 μW and A-scan exposure time of 1 ms. The axial and lateral resolutions of the system are 6.5 μm and 8.1 μm, respectively.
authors.affiliation: Biophotonics Lab, University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Pang
authors.affiliation: Biophotonics Lab, University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, 200240, China ; State Key Laboratory of Low-Dimension Quantum Physics, Tsinghua University, Beijing, 100084, China.
authors.forename: Jigang
authors.initials: J
authors.lastname: Wu
keywords: (120.5800) Scanners; (170.2150) Endoscopic imaging; (170.3880) Medical and biological imaging; (170.4500) Optical coherence tomography