Table 1.
MV‐CBCT acquisition protocols used in this study: scan length, sampling rate, and total exposure.
| Protocol Number | Start | Arc Stop | Length | Number of Projections | Sampling Rate Degree/Projection | Exposure (MU) | MU/ Projection |
|---|---|---|---|---|---|---|---|
| 1 | 180° | 180° | 360° | 180 | 2.0 | 13.5 | 0.0750 |
| 2 | 180° | 180° | 360° | 360 | 1.0 | 13.5 | 0.0375 |
| 3 | 180° | 180° | 360° | 400 | 0.9 | 13.5 | 0.0338 |
| 4 | 180° | 180° | 360° | 450 | 0.8 | 13.5 | 0.0300 |
| 5 | 180° | 180° | 360° | 600 | 0.6 | 13.5 | 0.0225 |
| 6 | 270° | 110° | 200° | 100 | 2.0 | 13.5 | 0.1350 |
| 7 | 270° | 110° | 200° | 200 | 1.0 | 13.5 | 0.0675 |
| 8 | 270° | 110° | 200° | 400 | 0.5 | 13.5 | 0.0338 |
| 9 | 180° | 180° | 360° | 360 | 1.0 | 7.2 | 0.0200 |