Table 1.
Summary of benchmark credentialing attempts, reasons for not passing, and planning techniques used in the 59 passing benchmarks.
| No. | Percentage | |
|---|---|---|
| Number of attempts at passing benchmark (n = 63) | ||
| 1 | 32 | 51% |
| 2 | 24 | 38% |
| 3 | 3 | 5% |
| No further attempts | 4 | 6% |
| Reasons for not passing benchmark at first attempt (n = 31) | ||
| Separate plans did not meet OAR criteria | 7 | 23% |
| PTV coverage unacceptably high or low | 7 | 23% |
| Stomach dose constraints exceeded | 3 | 10% |
| Spinal dose constraints exceeded | 7 | 23% |
| Conformity does not meet SBRT guideline | 5 | 16% |
| Other | 2 | 6% |
| Planning technique used to create passing benchmark (n = 59) | ||
| VMAT | 46 | 78% |
| IMRT | 8 | 14% |
| 3DCRT | 1 | 2% |
| Robotic Radiosurgery | 4 | 7% |
| Number of plans and isocenters utilized (n = 59) | ||
| 1 plan/1 isocenter | 39 | 66% |
| 1 plan/2 isocenters | 14 | 24% |
| 2 plans | 2 | 3% |
| Robotic Radiosurgery | 4 | 7% |
| Structures prioritized (n = 59) | ||
| PTV | 44 | 75% |
| Stomach | 15 | 25 % |