TABLE I.
Dose gradient factors for IMRT, spine SRS, and RPC H&N phantom plans and axial planar film measurements.
| Planned values | Measured values | |||||
|---|---|---|---|---|---|---|
| Application | Mean dose gradient factor | Standard deviation | Range | Mean dose gradient factor | Standard deviation | Range |
| IMRT (10 plans, 10 measurements) | 0.956 | 0.350 | [0.567, 1.690] | 0.827 | 0.354 | [0.504, 1.534] |
| SpineSRS (10 plans, 10 measurements) | 0.434 | 0.080 | [0.330, 0.565] | 0.337 | 0.083 | [0.249, 0.485] |
| RPC H&N phantom (3 plans, 9 measurements) | 0.618 | 0.096 | [0.542, 0.747] | 0.504 | 0.042 | [0.418, 0.528] |