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Internal target volumes (in cubic centimetres) measured with different four-dimensional cone beam CT (4DCBCT) gantry rotation speed
| CT | 3 cm | 2 cm | 1 cm |
|---|---|---|---|
| 4DCT | 44.3 | 18.4 | 4.1 |
| 4DCT-derived average CT | 40.7 | 17.4 | 4.0 |
| 4DCBCT: 36° min−1 | 39.5 | 15.0 | 3.4 |
| 4DCBCT: 50° min−1 | 39.0 | 14.7 | 3.4 |
| 4DCBCT: 75° min−1 | 38.6 | 14.5 | 3.2 |
| 4DCBCT: 100° min−1 | 38.2 | 14.3 | 3.1 |
| 4DCBCT: 150° min−1 | 37.8 | 14.2 | 2.9 |
| 4DCBCT: 200° min−1 | 36.4 | 14.1 | 3.0 |
4DCT, four-dimensional CT.
