Endoscopic forward-viewing optical coherence tomography and angiography with MHz swept source
Journal
Optics Letters
Journal Volume
42
Journal Issue
16
Pages
3193-3196
Date Issued
2017
Author(s)
Liang K.
Ahsen O.O.
Wang Z.
Liang W.
Potsaid B.M.
Tsai T.-H.
GiacomelLi M.G.
Jayaraman V.
Mashimo H.
Li X.
Fujimoto J.G.
Abstract
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.
Type
journal article