Table 1.
Standard deviations of random and systematic errors, values of the mean of means, and PTV margin estimates for DIBH and DEBH
| Pretreatment DIBH |
Posttreatment DIBH |
||||||
|---|---|---|---|---|---|---|---|
| AP | SI | RL | AP | SI | RL | ||
| Random | 1.7 | 2.2 | 1.4 | 2.6 | 3.6 | 1.8 | mm |
| Systematic | 1.3 | 1.5 | 0.8 | 2.5 | 2.7 | 1.1 | mm |
| Mean of means | 0.3 | 0.0 | -0.2 | 0.2 | –0.1 | 0.3 | mm |
| PTV margin | 4.3 | 5.1 | 2.7 | 7.7 | 9.0 | 3.8 | mm |
| Pretreatment DEBH |
Posttreatment DEBH |
||||||
|---|---|---|---|---|---|---|---|
| AP | SI | RL | AP | SI | RL | ||
| Random | 1.1 | 1.4 | 1.3 | 1.5 | 2.0 | 1.2 | mm |
| Systematic | 0.8 | 0.8 | 1.0 | 1.2 | 1.2 | 0.7 | mm |
| Mean of means | 0.1 | –0.3 | 0.0 | 0.0 | –0.7 | –0.2 | mm |
| PTV margin | 2.6 | 2.9 | 3.3 | 3.8 | 4.3 | 2.6 | mm |
Abbreviations: AP = anterior–posterior; DEBH = deep expiration breath hold; DIBH = deep inspiration breath hold; PTV = planning target volume; RL = right–left; SI = superior–inferior.