Customized Slab-Segmentation Method for Projection-Artifact Elimination in Best Vitelliform Macular Dystrophy: A Swept-Source Optical Coherence Tomography Angiography Study

To assess the efficacy of customized slab segmentation in eliminating projection artifacts in swept-source optical coherence tomography angiography (SS-OCTA) images of Best vitelliform macular dystrophy (BVMD). Prospective case series including different stages of BVMD. We analyzed SS-OCTA images fo...

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Bibliographic Details
Published in:Clinical ophthalmology (Auckland, N.Z.) N.Z.), 2021-01, Vol.15, p.825-834
Main Authors: Moussa, Magdy, Leila, Mahmoud, Moussa, Omar, Hashem, Ahmed Osama
Format: Article
Language:English
Subjects:
Angiography
Lasers
Medical imaging
Medical research
Medicine, Experimental
Methods
Original Research
Patients
projection artifact in ss-octa images - segmentation errors in bvmd images - ss-octa imaging of bvmd - customized slab segmentation in ss-octa images
Retina
Retinal detachment
Statistical analysis
Tomography
Variables
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Summary:To assess the efficacy of customized slab segmentation in eliminating projection artifacts in swept-source optical coherence tomography angiography (SS-OCTA) images of Best vitelliform macular dystrophy (BVMD). Prospective case series including different stages of BVMD. We analyzed SS-OCTA images for flow signals in the outer retina and coregistered B-scan images for distortion of the segmentation slabs defining the outer retina. We applied a customized method for slab realignment whenever BVMD lesions produced distortion of the slabs. Afterward, we checked the images to determine whether the previously noted flow signal had persisted or disappeared, described as "true flow" or "pseudoflow", respectively. Categorical variables were analyzed with X or Fisher's exact tests, while quantitative variables were analyzed with independent -test at 80% of the retinal thickness (
ISSN:1177-5467
1177-5483
1177-5483
DOI:10.2147/OPTH.S294204