Open AccessEndoscopic forward-viewing optical coherence tomography and angiography with MHz swept source
Author(s) -
Kaicheng Liang,
Osman O. Ahsen,
Zhao Wang,
Hsiang Chieh Lee,
Wenxuan Liang,
Benjamin Potsaid,
Tsung Han Tsai,
Michael G. Giacomelli,
Vijaysekhar Jayaraman,
Hiroshi Mashimo,
Xingde Li,
James G. Fujimoto
Publication year - 2017
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.42.003193
Subject(s) - optical coherence tomography , scanner , field of view , optics , tomography , transverse plane , physics , radiology , medicine
Endoscopic optical coherence tomography (OCT) instruments are mostly side viewing and rely on at least one proximal scan, thus limiting accuracy of volumetric imaging and en face visualization. Previous forward-viewing OCT devices had limited axial scan speeds. We report a forward-viewing fiber scanning 3D-OCT probe with 900 μm field of view and 5 μm transverse resolution, imaging at 1 MHz axial scan rate in the human gastrointestinal tract. The probe is 3.3 mm diameter and 20 mm rigid length, thus enabling passage through the endoscopic channel. The scanner has 1.8 kHz resonant frequency, and each volumetric acquisition takes 0.17 s with 2 volumes/s display. 3D-OCT and angiography imaging of the colon was performed during surveillance colonoscopy.