Open AccessPostprocessing algorithms to minimize fixed-pattern artifact and reduce trigger jitter in swept source optical coherence tomography
Author(s) -
Gangjun Liu,
Ou Tan,
Simon S. Gao,
Alex D. Pechauer,
ByungKun Lee,
Lu Chen,
James G. Fujimoto,
David Huang
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.009824
Subject(s) - optical coherence tomography , jitter , optics , phase noise , fixed pattern noise , noise (video) , computer science , residual , coherence (philosophical gambling strategy) , amplitude , phase (matter) , algorithm , physics , computer vision , telecommunications , image sensor , quantum mechanics , image (mathematics)
We propose methods to align interferograms affected by trigger jitter to a reference interferogram based on the information (amplitude/phase) at a fixed-pattern noise location to reduce residual fixed-pattern noise and improve the phase stability of swept source optical coherence tomography (SS-OCT) systems. One proposed method achieved this by introducing a wavenumber shift (k-shift) in the interferograms of interest and searching for the k-shift that minimized the fixed-pattern noise amplitude. The other method calculated the relative k-shift using the phase information at the residual fixed-pattern noise location. Repeating this wavenumber alignment procedure for all A-lines of interest produced fixed-pattern noise free and phase stable OCT images. A system incorporating these correction routines was used for human retina OCT and Doppler OCT imaging. The results from the two methods were compared, and it was found that the intensity-based method provided better results.