Table 1.
Acquisition parameters of CT image for phantom generation
| Cervical vertebrae | Knee | |
|---|---|---|
| Scanner model | Siemens SOMATOM Definition Edge | Philips iQon Spectral CT |
| Tube voltage | 120 kVp | 120 kVp |
| Tube current | 105 mA | 196 mA |
| Rotation time | 1000 ms | 1026 ms |
| Spiral pitch factor | 0.8 | Axial |
| Exposure | 131 mAs | 201 mAs |
| CTDIvol | 8.85 mGy | 17.1 mGy |
| Collimation width | 0.6 / 38.4 mm | 0.625 / 40.0 mm |
| Slice thickness | 0.6 mm | 0.67 mm |
| Reconstruction filter | I26s\3 | B |
| Field of view | 99.75 × 99.75 mm2 | 304 × 304 mm2 |
| Matrix size | 228 × 228 pixel2 | 512 × 512 pixel2 |
| Pixel spacing | 0.4375 mm | 0.5938 mm |
Collimation width values are noted as single / total collimation width