Table 1 Acquisition conditions for calculated and measured dose distribution
From: To propose adding index of achievement (IOA) to IMRT QA process
Active area (cm × cm) | 40 × 40 | 40 × 30 |
|---|---|---|
Calculated matrix / Pixel pitch (mm) | 1024 × 1024 / 0.393 | 512 × 384 / 0.786 |
Measured matrix / Pixel pitch (mm) | 1190 × 1190 / 0.336 | 1024 × 768 / 0.392 |
EPID model | a-Si 1200 | a-Si 1000 |
Head and Neck (cases) | 21 | 9 |
Prostate (cases) | 13 | 17 |