Table 1.
Effect of imaging parameters on image quality and radiation dose
| Imaging parameter | Spatial resolution | Contrast | Noise | Artefacts | Radiation dose |
|---|---|---|---|---|---|
| FOV size ↑a | – | ↓ | ↑ | ↑ | ↑ |
| kV ↑ | – | ↓ | ↓ | –b | ↑ |
| mAs ↑ | – | – | ↓ | – | ↑ |
| Voxel size ↑ | ↓ | – | ↓ | – | – |
↓, decrease; ↑, increase; FOV, field of view; kV, tube voltage; mAs, tube current-exposure time product.
a
Minor image quality effects due to factors like beam divergence and truncation of the FOV not being taken into account.
b
Beam hardening is somewhat reduced at higher tube potential values (Figure 16).