Table 3.
Percentage of B-Scans with Artifacts in 3D Volume Scans (Smallest Annulus Size of 2.5–3.5 mm)
| Artifact Type | Glaucoma (%) (n = 106)a |
Normal (%) (n = 95)a |
P |
|---|---|---|---|
| Posterior RNFL misidentification | 21.9 | 15.5 | 0.002*** |
| RPE misidentification | 5.8 | 4.9 | 0.38 |
| Anterior RNFL misidentification | 3.8 | 2.4 | 0.23 |
| PVD/ERM | 1.9 | 1.2 | 0.33 |
| Out of register | 2.9 | 2.7 | 0.89 |
| Peripapillary atrophy | 2.0 | 0.4 | 0.10 |
| Degraded | 1.3 | 0.7 | 0.20 |
| Cut edge | 0.3 | 0.6 | 0.39 |
| Complete absence of segmentation | 0.1 | 0.1 | 0.65 |
| Mirroring | 0.1 | 0.2 | 0.77 |
| Motion artifact | 0 | 0 | N/A |
| Any artifact (total percentage)b | 35.4 | 21.8 | <0.001*** |
a
Percentage of artifacts per eye was calculated as the number of B-scans with artifact type divided by 97, which was the total number of B-scans per volume scan that contributed to calculations for the smallest sized annulus (2.5–3.5 mm).
b
Total percentage represents the total percentage of B-scans within a volume scan with at least one artifact type. Scans with multiple artifacts were only counted once.
***
Results are statistically significant.