Table 1.
Device measurement averages taken across all six patient plans. The measurement used for the reproducibility analysis is given in parentheses (percent of pixels passing gamma for the planar devices, the nC charge reading for the cc04 ion chamber, and the dose (cGy) measured for the multiple ion chamber (MIC) phantom. The averages reported are for both the “redelivery” and “total delivery” measurements (three measurements each), which over the six patients translates to averages taken over 18 measurements each for “redelivery” and “total delivery”
| QA System (Format of Measurement) | Redelivery | Total Delivery |
|---|---|---|
| AP field‐by‐field MapCHECK (% pixels passing gamma) | 99.0 | 99.0 |
| Planned‐angle MapCHECK (% pixels passing gamma) | 96.4 | 95.7 |
| cc04 ion chamber (charge in nC) | 2.49 | 2.49 |
| Radiographic film (% pixels passing gamma) | 93.4 | 92.3 |
| ArcCHECK (% pixels passing gamma) | 93.1 | 93.3 |
| AP composite MapCHECK (% pixels passing gamma) | 98.6 | 98.3 |
| MIC (dose in cGy) | 167 | 167 |