Table 2.
Mean CT number ± SD (top) and mean noise ± SD (bottom) of the regions-of-interest measured in the background and the five body tissues
| Liver | Muscle | Spleen | Air | Fat | Aorta | |
|---|---|---|---|---|---|---|
| CT number (HU) | ||||||
| FBP | 49.5 ± 14.7 | 52.9 ± 10.7 | 36.7 ± 10.1 | −992.1 ± 10.8 | −126.8 ± 12.6 | 45.3 ± 9.4 |
| PS | 49.4 ± 14.8 | 52.2 ± 10.6 | 36.4 ± 10.2 | −992.5 ± 10.6 | −126.6 ± 12.3 | 44.2 ± 9.1 |
| IR | 49.6 ± 14.8 | 52.9 ± 10.5 | 36.8 ± 10.1 | −992.8 ± 11.2 | −126.7 ± 12.6 | 45.4 ± 9.1 |
| Noise (HU) | ||||||
| FBP | 45.9 ± 9.6 | 42.7 ± 7.6 | 43.9 ± 9.3 | 22.2 ± 12.4 | 35.3 ± 5.6 | 36.6 ± 6.7 |
| PS | 26.8 ± 7.5 | 24.0 ± 6.2 | 25.1 ± 6.6 | 10.0 ± 13.4 | 18.0 ± 4.9 | 24.8 ± 5.1 |
| IR | 31.7 ± 6.7 | 29.6 ± 5.4 | 30.5 ± 6.3 | 16.9 ± 13.0 | 24.9 ± 4.2 | 26.6 ± 5.0 |
FBP: Reconstruction with filtered back-projection, HU: Hounsfield unit, IR: Iterative reconstructed images; PS: PixelShine employed on FBP-images;SD, standard deviation.