Technical factors for 3DRA acquisition protocols
| Projections per Rotation | Rotation | Rotations Required per Acquisition | kVp Target | Detector Dose (nGy/projection) | Filtration (mm Cu) | Half-Value Layer (mm Al) | |
|---|---|---|---|---|---|---|---|
| Protocol 1 (subtracted) | 133 | 200° | 2 (mask, contrast) | 70 | 360 | 0.0 | 2.9 |
| Protocol 2 (subtracted) | 133 | 200° | 2 (mask, contrast) | 90 | 200 | 0.3 | 7.1 |
| Protocol 3 (unsubtracted) | 248 | 200° | 1 (contrast) | 90 | 100 | 0.6 | 8.2 |