Paired t test comparison of the initial and final sessions in the same patient on both frontal and lateral planes
| Initial session | Final session | P value | ||
| DAP rate (Gy×cm2/min) | Frontal plane | 0.668 (95% CI 0.537 to 0.798) | 0.848 (95% CI 0.723 to 0.974) | 0.02 |
| Lateral plane | 0.365 (95% CI 0.318 to 0.411) | 0.519 (95% CI 0.384 to 0.654) | 0.03 | |
| CAK rate (mGy/min) | Frontal plane | 12.7 (95% CI 10.6 to 14. 8) | 23.1 (95% CI 15.6 to 30.7) | 0.007 |
| Lateral plane | 6.2 (95% CI 5.4 to 7.0) | 12.9 (95% CI 7.7 to 18.1) | 0.01 | |
CAK, cumulative air kerma; DAP, dose–area product.