Table 4.
Ionization chamber measurements for verification of a pair of orthogonal fields
| Field | Depth (cm) | Calc. Dose (cGy) | Difference (%) |
|---|---|---|---|
| gantry angle 0° | 5 | 169 | –0.8 |
| gantry angle 0° | 15 | 100 | 0.9 |
| gantry angle 90° | 5 | 167 | –1.6 |
| gantry angle 90° | 15 | 100 | 2.4 |
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