TABLE 5.
Calculated local gamma pass percentages with 10% dose thresholding by treatment site and image acquisition. SBRT and SRS plans used 1%/1 mm criteria, while IMRT plans used 1%/2 mm criteria.
| Plan | Thorax FDK | Thorax iCBCT | Pelvis FDK | Pelvis iCBCT | Pelvis Large FDK | Pelvis Large iCBCT |
|---|---|---|---|---|---|---|
| Spine SBRT | 73.0 | 94.0 | 69.7 | 94.2 | 75.8 | 93.4 |
| Rib SBRT | 83.9 | 94.7 | 84.4 | 97.3 | 88.2 | 98.1 |
| Lung SBRT | 77.3 | 99.6 | 70.6 | 99.4 | 79.0 | 98.4 |
| Plan | Head FDK | Head iCBCT | Head* FDK | Head* iCBCT |
|---|---|---|---|---|
| HAWBRT | 99.4 | 99.5 | 99.5 | 99.5 |
| H&N | 97.9 | 97.8 | 97.8 | 97.8 |
| SRS | 100 | 100 | 100 | 100 |
Abbreviations: CBCT, cone beam computed tomography; CT, computed tomography; FDK, Feldkamp–Davis–Kress, IMRT, intensity‐modulated radiotherapy; SBRT, stereotactic body radiotherapy, SRS, stereotactic radiosurgery.