Table 1.
Quantitative image analysis of pediatric CT with different reconstruction techniques in comparison with 50% ASIR-V
| Parameters | ASIR-V 50 | ASIR-V 100 | DLR-M | DLR-H | ||||
|---|---|---|---|---|---|---|---|---|
| Chest CT without contrast enhancement (n = 16) | ||||||||
| Attenuation (HU) | lung | − 795.9 ± 91.1 | − 796.2 ± 94.2 | 0.872 | − 797.6 ± 94.3 | 0.872 | − 796.7 ± 93.9 | 0.872 |
| paraspinal muscle | 56.1 ± 11.1 | 54.6 ± 12.1 | 0.552 | 56.3 ± 10.7 | 0.552 | 54.9 ± 9.8 | 0.552 | |
| Noise | 21.8 ± 3.7 | 15.6 ± 10.9 | 0.159 | 20.2 ± 3.8 | 0.455 | 14.6 ± 2.5 | < 0.001 | |
| CNR | Lung | 11.4 ± 3.7 | 22.9 ± 6.9 | < 0.001 | 25.8 ± 13.3 | < 0.001 | 28.4 ± 11.4 | < 0.001 |
| SNR | Lung | 10.7 ± 3.5 | 21.4 ± 6.4 | < 0.001 | 24.1 ± 12.5 | < 0.001 | 26.6 ± 10.8 | < 0.001 |
| Chest CT with contrast enhancement (n = 12) | ||||||||
| Attenuation (HU) | Lung | − 718.9 ± 139.4 | − 718.7 ± 144.0 | 0.989 | − 720.5 ± 145.4 | 0.989 | − 719.1 ± 142.8 | 0.989 |
| Paraspinal muscle | 65.0 ± 8.5 | 64.6 ± 5.8 | 0.425 | 64.3 ± 5.2 | 0.425 | 62.6 ± 6.8 | 0.425 | |
| Noise | 24.5 ± 6.1 | 12.6 ± 3.8 | < 0.001 | 21.3 ± 4.9 | 0.172 | 14.8 ± 4.7 | < 0.001 | |
| CNR | Lung | 10.4 ± 4.0 | 17.8 ± 8.1 | 0.010 | 20.0 ± 6.9 | 0.001 | 21.4 ± 8.6 | < 0.001 |
| SNR | Lung | 9.6 ± 3.7 | 16.4 ± 7.6 | 0.011 | 18.4 ± 6.6 | 0.001 | 19.8 ± 8.1 | < 0.001 |
| Abdomen CT with contrast enhancement (n = 23) | ||||||||
| Attenuation (HU) | Liver | 131.4 ± 28.4 | 131.7 ± 28.7 | 0.369 | 125.9 ± 39.1 | 0.369 | 132.6 ± 28.6 | 0.369 |
| Aorta | 185.7 ± 45.2 | 184.9 ± 45.9 | 1.000 | 185.3 ± 45.1 | 0.227 | 187.6 ± 45.4 | 0.085 | |
| Paraspinal muscle | 71.2 ± 8.4 | 71.3 ± 6.6 | 1.000 | 72.7 ± 6.0 | 0.535 | 71.1 ± 6.2 | 1.000 | |
| Noise | 19.9 ± 3.7 | 11.1 ± 3.6 | < 0.001 | 16.3 ± 3.1 | 0.002 | 12.2 ± 2.4 | < 0.001 | |
| CNR | Liver | 3.2 ± 1.7 | 5.3 ± 3.0 | < 0.001 | 3.2 ± 2.4 | 1.000 | 4.9 ± 2.5 | < 0.001 |
| Aorta | 5.3 ± 2.2 | 9.5 ± 4.3 | < 0.001 | 5.8 ± 1.9 | 0.012 | 8.0 ± 2.9 | < 0.001 | |
| SNR | Liver | 6.8 ± 2.1 | 11.5 ± 3.9 | < 0.001 | 7.6 ± 2.7 | 0.583 | 10.7 ± 2.9 | < 0.001 |
| Aorta | 8.5 ± 2.4 | 15.6 ± 5.1 | < 0.001 | 9.7 ± 2.0 | 0.002 | 13.0 ± 3.2 | < 0.001 | |
The p-values < 0.05 were marked as bold
Values are presented as the mean ± standard deviation
ASIR-V 50, 50% adaptive statistical iterative reconstruction-V
ASIR-V 100 100% ASIR-V, DLR-M medium strength deep learning reconstruction, DLR-H, high strength DLR, CNR contrast to noise ratio, SNR signal to noise ratio. Image noise is based on standard deviation of paraspinal muscle attenuation