Purpose: To evaluate artifacts in optical coherence tomography angiography (OCT-A) images of multiple sclerosis (MS) patients and healthy controls. Materials and methods: This was a prospective cross-sectional study conducted at the Department of Neurology and the Wilmer Eye Institute at Johns Hopkins Hospital. Subjects included patients with an established diagnosis of MS and healthy volunteers. OCT-A was performed using Spectralis® OCT-A prototype, OCT2 (Heidelberg, Germany). The type and frequency of artifacts, the clinical factors associated with them, and their impact on vessel density measurements were assessed. Results: Overall, 385 images from 102 participants were analyzed. The majority of images (97.1%) had some degree of artifact. The most frequent was motion artifact (96.3%), followed by blinking (51.9%), and loss of focus (25.1%). MS patients were more likely to have any artifact vs. controls (OR [95% CI], 3.83 [1.12–12.92]), and were more likely to have motion artifacts with longer disease duration (OR [95% CI], 1.11 [1.03–1.20]) or history of optic neuritis (OR [95% CI], 4.24 [1.19–15.16]). The relative area occupied by the artifact was found to underestimate vessel density measurements in both MS patients and controls. Conclusions: Artifacts are common with OCT-A imaging using this particular Spectralis® OCT-A prototype and can impact quantitative vascular density metrics. Future studies should review images for artifacts before drawing definitive conclusions.
- Image Artifacts
- Image Quality
- Multiple Sclerosis
- Optical Coherence Tomography Angiography
ASJC Scopus subject areas
- Sensory Systems
- Cellular and Molecular Neuroscience