A1 Refereed original research article in a scientific journal
Real-time eye motion compensation for OCT imaging with tracking SLO
Authors: Vienola KV, Braaf B, Sheehy CK, Yang Q, Tiruveedhula P, Arathorn DW, de Boer JF, Roorda A
Publisher: Optical Society of America
Publication year: 2012
Journal: Biomedical Optics Express
Journal name in source: BIOMEDICAL OPTICS EXPRESS
Journal acronym: Biomed. Opt. Express
Volume: 3
Issue: 11
First page : 2950
Last page: 2963
Number of pages: 14
ISSN: 2156-7085
DOI: https://doi.org/10.1364/BOE.3.002950
Web address : https://opg.optica.org/boe/fulltext.cfm?uri=boe-3-11-2950
Abstract
Fixational eye movements remain a major cause of artifacts in optical coherence tomography (OCT) images despite the increases in acquisition speeds. One approach to eliminate the eye motion is to stabilize the ophthalmic imaging system in real-time. This paper describes and quantifies the performance of a tracking OCT system, which combines a phase-stabilized optical frequency domain imaging (OFDI) system and an eye tracking scanning laser ophthalmoscope (TSLO). We show that active eye tracking minimizes artifacts caused by eye drift and micro saccades. The remaining tracking lock failures caused by blinks and large saccades generate a trigger signal which signals the OCT system to rescan corrupted B-scans. Residual motion artifacts in the OCT B-scans are reduced to 0.32 minutes of arc (similar to 1.6 mu m) in an in vivo human eye enabling acquisition of high quality images from the optic nerve head and lamina cribrosa pore structure. (C) 2012 Optical Society of America
Fixational eye movements remain a major cause of artifacts in optical coherence tomography (OCT) images despite the increases in acquisition speeds. One approach to eliminate the eye motion is to stabilize the ophthalmic imaging system in real-time. This paper describes and quantifies the performance of a tracking OCT system, which combines a phase-stabilized optical frequency domain imaging (OFDI) system and an eye tracking scanning laser ophthalmoscope (TSLO). We show that active eye tracking minimizes artifacts caused by eye drift and micro saccades. The remaining tracking lock failures caused by blinks and large saccades generate a trigger signal which signals the OCT system to rescan corrupted B-scans. Residual motion artifacts in the OCT B-scans are reduced to 0.32 minutes of arc (similar to 1.6 mu m) in an in vivo human eye enabling acquisition of high quality images from the optic nerve head and lamina cribrosa pore structure. (C) 2012 Optical Society of America
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