Correction of rotational distortion for catheter-based en face OCT and OCT angiography
Journal
Optics Letters
Journal Volume
39
Journal Issue
20
Pages
5973-5976
Date Issued
2014
Author(s)
Ahsen O.O.
Giacomel Li M.G.
Wang Z.
Liang K.
Tsai T.-H.
Potsaid B.
Mashimo H.
Fujimoto J.G.
Abstract
We demonstrate a computationally efficient method for correcting the nonuniform rotational distortion (NURD) in catheter-based imaging systems to improve endoscopic en face optical coherence tomography (OCT) and OCT angiography. The method performs nonrigid registration using fiducial markers on the catheter to correct rotational speed variations. Algorithm performance is investigated with an ultrahigh-speed endoscopic OCT system and micromotor catheter. Scan nonuniformity is quantitatively characterized, and artifacts from rotational speed variations are significantly reduced. Furthermore, we present endoscopic en face OCT and OCT angiography images of human gastrointestinal tract in vivo to demonstrate the image quality improvement using the correction algorithm.
Type
journal article