Table 4 Estimated variance attributed to observers and images using variance components analysis
Image and Direction of Displacement | No of images | Mean within-image std dev (mm) | Range of within-image std dev (mm) |
|---|---|---|---|
AP LR | 200 | 0.7 | 0.1 to 3.5 |
AP SI | 200 | 1.0 | 0.2 to 2.5 |
Lat AP | 200 | 1.7 | 0.6 to 4.5 |
Lat SI | 200 | 1.4 | 0.3 to 4.0 |