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Improved Repeatability of Retinal Thickness Measurements Using Line-Scan Ophthalmoscope Image-Based Retinal Tracking

Authors :
Tamera Schoenholz
Srinivas R. Sadda
Jennifer Hu
Daniel J Barajas
Cullen Barnett
Cornelia Gottlieb
Source :
Ophthalmic Surgery, Lasers and Imaging Retina. 46:310-314
Publication Year :
2015
Publisher :
SLACK, Inc., 2015.

Abstract

BACKGROUND AND OBJECTIVE: To assess repeatability and speed of a line-scan ophthalmoscope (LSO) image-based tracking system and compare to the point-scanning approach. PATIENTS AND METHODS: Thirty-five eyes with retinal diseases underwent volume scans using two spectral-domain optical coherence tomography (OCT) devices: a line-scan tracking Cirrus HD-OCT (Carl Zeiss Meditec; Dublin, CA) and point-scan tracking Spectralis HRA+OCT (Heidelberg Engineering, Heidelberg, Germany). Eyes were also imaged on the Cirrus HD-OCT with tracking disabled. RESULTS: Mean difference in central subfield thickness (CST) between consecutive scans was 2.6 µm for the Cirrus without tracking, 1.7 µm with tracking, and 3.6 µm for the Spectralis. The repeatability standard deviation was 3.0 µm for the Cirrus without tracking, 1.5 µm with tracking, and 4.0 µm for the Spectralis. Coefficient of variation for the CST was 1.1% for the Cirrus without tracking, 0.5% with tracking, and 1.4% for the Spectralis. Mean scan acquisition time was 12.3 ± 6.2 seconds for the Spectralis, 7.8 ± 6.7 for the Cirrus with tracking, and 4.3 ± 0.6 for the Cirrus without tracking. CONCLUSION: Real-time LSO image-based retinal tracking appears to improve repeatability of OCT retinal thickness measurements. [ Ophthalmic Surg Lasers Imaging Retina . 2015;46:310–314.]

Details

ISSN :
23258179 and 23258160
Volume :
46
Database :
OpenAIRE
Journal :
Ophthalmic Surgery, Lasers and Imaging Retina
Accession number :
edsair.doi.dedup.....ca882d9425b1fc3dc6cc292b5a6c97f7
Full Text :
https://doi.org/10.3928/23258160-20150323-02