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Mean and one standard deviation of the size of mechanical and radiation (collimated by the Aktina Cone and by the diaphragms and the MLC) isocenters for four energies (6MV, 15MV, 6MV FFF, 10MV FFF).
| Mechanical (mm) | Radiation (Aktina cone) (mm) | Radiation (DIA/MLC) (mm) | |
|---|---|---|---|
| Isocenter size (Mean ± 1SD) | 0.70 ± 0.04 | 0.64 ± 0.08 | 0.57 ± 0.12 |
