Table 1.
Thoracic ion chamber measurements in vertebral body
| Treatment Plan | Ion Chamber Measurement (Gy) | Treatment Platform | ||||
|---|---|---|---|---|---|---|
| TomoTherapy | Vero | TrueBeam (Flattened) | TrueBeam (FFF) | CyberKnife | ||
| Plan A | Calculated Dose | 16.5 | 20.6 | 16.5 | 16.3 | 17.9 |
| Measured Dose | 16.4 | 21.1 | 17.0 | 16.5 | 18.5 | |
| % Difference | ‐0.3 | 2.6 | 3.1 | 1.4 | 3.0 | |
| Plan B | Calculated Dose | 16.6 | 20.8 | 16.4 | 16.5 | 21.8 |
| Measured Dose | 16.6 | 21.5 | 16.3 | 16.6 | 22.4 | |
| % Difference | 0.0 | 3.2 | ‐0.3 | 0.6 | 2.4 | |
| Plan D | Calculated Dose | 16.2 | 21.2 | 16.0 | 16.2 | 20.4 |
| Measured Dose | 16.5 | 21.5 | 16.1 | 16.3 | 20.6 | |
| % Difference | 2.2 | 1.4 | 0.6 | 0.8 | 0.7 | |