Format

Send to

Choose Destination
Biomed Opt Express. 2016 Sep 6;7(10):3905-3915. eCollection 2016 Oct 1.

Evaluation of artifact reduction in optical coherence tomography angiography with real-time tracking and motion correction technology.

Author information

1
Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA.
2
Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA; Optovue, Inc. 2800 Bayview Dr., Fremont, CA 94538, USA.
3
Optovue, Inc. 2800 Bayview Dr., Fremont, CA 94538, USA.

Abstract

Artifacts introduced by eye motion in optical coherence tomography angiography (OCTA) affect the interpretation of images and the quantification of parameters with clinical value. Eradication of such artifacts in OCTA remains a technical challenge. We developed an algorithm that recognizes five different types of motion artifacts and used it to evaluate the performance of three motion removal technologies. On en face maximum projection of flow images, the summed flow signal in each row and column and the correlation between neighboring rows and columns were calculated. Bright line artifacts were recognized by large summed flow signal. Drifts, distorted lines, and stretch artifacts exhibited abnormal correlation values. Residual lines were simultaneously a local maximum of summed flow and a local minimum of correlation. Tracking-assisted scanning integrated with motion correction technology (MCT) demonstrated higher performance than tracking or MCT alone in healthy and diabetic eyes.

KEYWORDS:

(100.2980) Image enhancement; (170.4470) Ophthalmology; (170.4500) Optical coherence tomography; (330.4150) Motion detection

Supplemental Content

Full text links

Icon for PubMed Central
Loading ...
Support Center