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Intra-fraction variations for the four data points (cm)
| Data point | Pooled SD | Difference |
|---|---|---|
| CLD | 0.08 | 0.25 |
| CFD | 0.08 | 0.35 |
| SAM | 0.37 | 1.47 |
| IAM | 0.09 | 0.68 |
CLD, central lung distance; CFD, central flash distance; SAM, superior axial measurement; IAM, inferior axial measurement.
