Assessing Errors Inherent in OCT-Derived Macular Thickness Maps
Figure 2
Reduction in B-scan sampling results in less retinal area being scanned. (a) Eight simulated B-scans spaced 750 μm apart over a 6 mm × 6 mm volume. At this sampling, assuming a 15 μm spot size and 512 A scans/B-scan, only 1.8% of the volume is scanned. (b) Sixty-four simulated B-scans spaced 94 μm apart over a 6 mm × 6 mm volume. At this sampling, only 15% of the volume is scanned. (c) Percentage of OCT volume scanned as a function of B-scan density. Complete sampling of the retinal volume at 512 A scans/B-scan would require nearly 600 B-scans.
