Table 2.
Uniformity, noise values, spatial resolution, and CNR of the ACR 464 CT phantom for all protocols. The small patient thickness protocols of the mCBCT were selected given the 20 cm diameter of the imaged phantom
| 3D imaging protocol | Uniformity (%) | Noise (%) | Maximum resolvable detail (lp/cm) | CNR in 25 mm diameter rod |
|---|---|---|---|---|
| hCBCT 27 cm | 1.4 | 3.1 | 9 | 5.1 |
| hCBCT 37 cm | 1.4 | 2.6 | 10 | 1.3 |
| hCBCT 48 cm | 1.0 | 2.4 | 9 | 0.8 |
| mCBCT LD | 4.1 | 3.8 | 10 | 0.1 |
| mCBCT SD | 2.1 | 3.4 | 10 | 0.4 |
| mCBCT HD | 1.5 | 3.4 | 10 | 1.5 |
LD, low dose; SD, standard dose; HD, high dose; lp, line pairs.