Table 2.
Comparison of measurements obtained by TrueBeam and MRL plans
| Variable | Dmean, cGy | |||
| Lumbar spine | Thoracic spine | |||
| GTV | Spinal cord | GTV | Spinal cord | |
| RayStation | ||||
| Measurement | 2605.2 ± 17.4 | 514.3 ± 2.7 | 2595.5 ± 9.6 | 470.4 ± 3.4 |
| Original plan | 2641.0 | 505.0 | 2664.0 | 440.0 |
| % difference | −1.4 | 1.8 | −2.6 | 6.9 |
| Monaco | ||||
| Measurement | 2702.9 ± 113.9 | 601.8 ± 22.9 | 2684 ± 14.4 | 884.6 ± 37.4 |
| Adapted plan | 2671.3 ± 19.6 | 605.6 ± 15.6 | 2602.3 ± 5.8 | 851.3 ± 39.6 |
| Original plan | 2644.5 | 562.8 | 2595.5 | 788.5 |
| % difference† | 1.2 | -0.6 | 3.1 | 3.9 |
†
% difference = (Measurement – (Adapted plan)) × 100 /Adapted plan