Table 1. Differences in retinal layer thickness segmentation between two expert manual graders for 29 B-scans (Column I), as compared to the thickness differences between the automatic segmentation and one expert manual grader of the same 29 B-scans (Column II). Column III reports the automatic and manual segmentation (of one grader) differences for a larger subset of 100 B-scans. Each pixel is 3.23 μm.
| Retinal Layer Thickness Differences | ||||||
|---|---|---|---|---|---|---|
|
Comparison of Two Manual Expert Graders |
Comparison of Automatic and Manual Segmentation |
|||||
| Column I | Column II | Column III | ||||
| 29 B-scans | 100 B-scans | |||||
| Retinal Layer | Mean Difference (Pixels) | Standard Deviation (Pixels) | Mean Difference (Pixels) | Standard Deviation (Pixels) | Mean Difference (Pixels) | Standard Deviation (Pixels) |
| NFL | 1.73 | 0.90 | 0.99 | 0.76 | 0.88 | 0.68 |
| GCLIPL | 1.06 | 0.95 | 0.57 | 0.48 | 0.77 | 0.65 |
| INL | 2.22 | 1.30 | 1.07 | 0.87 | 0.98 | 0.74 |
| OPL | 1.90 | 1.53 | 1.64 | 1.08 | 1.48 | 1.05 |
| ONL-IS | 1.63 | 1.19 | 1.40 | 1.06 | 1.20 | 0.92 |
| OS | 1.11 | 0.88 | 0.92 | 0.80 | 0.88 | 0.73 |
| RPE | 2.21 | 1.20 | 0.96 | 0.69 | 0.99 | 0.87 |
| Total Retina | 2.22 | 1.00 | 0.92 | 0.83 | 0.94 | 0.82 |