Table 1.
Imaging protocols and specifics applied with regard to 64- and 320-slice MDCT
| MDCT (slice) | 320 | 64 | ||
|---|---|---|---|---|
| CT mode | Volume | Helical | ||
| Protocol | A | B | A | B |
| kVp | 120 | 135 | 120 | 135 |
| mA | 200 | 400 | 200 | 400 |
| Imaging time (s) | 0.5 | 1.0 | 0.5 | 1.0 |
| Radiation dose (mSV) | < 0.1 | < 0.1 | < 0.1 | < 0.1 |
| Kernel | FC 30 (bone) + edge enhancing | FC 81 (high-resolution) | ||
| MTF 50% | 9.41 | 7.46 | 11.33 | 9.00 |
| MTF 10% | 11.76 | 9.86 | 13.27 | 12.52 |
| In-plane pixel size (µm) | 234 | 234 | 234 | 234 |
| Slice thickness (µm) | 500 | 500 | 500 | 500 |
| Slice increment (µm) | 250 | 250 | 300 | 300 |
Concerning the radiation dose please note that the radiation dose for the standard HR-pQCT scans, which are performed at an isotropic resolution of 82 µm3, is below 0.3 µSV