Table 1.
Comparison of tomotherapy machine and a conventional linac
| Tomotherapy Hi ART | Conventional linac |
|---|---|
| No flattening filter | Has flattening filter |
| Cone beam | Flat beam |
| Beam up to 5 × 40 cm2 | Beam up to 40 × 40 cm2 |
| 85 cm SAD | 100 cm SAD |
| No light field | Has light field |
| Fixed and movable lasers | Fixed lasers |
| Xe detector array | No such detectors |
| MVCT mode for imaging from | kVCT mode for imaging with the |
| same source | additional source |
| Pneumatically driven MLC leaves | Motorized MLC leaves |
| Helical treatment | Fixed gantry or arc therapy |
| Inverse planning only | Forward and inverse planning |