Table 1. Average visual grading analysis results from four radiologists.
| Tube input* | ASiR-V | DLIR | P | |||||
|---|---|---|---|---|---|---|---|---|
| 30 | 50 | 70 | Low | Medium | High | |||
| 70 kVp, 20 mAs | 3.33 [2, 4] | 3.50 [2, 4] | 3.67 [3, 5] | 3.75 [2, 5] | 4.08 [3, 5] | 4.92 [4, 5]† | <0.001 | |
| 70 kVp, 50 mAs | 3.42 [3, 4] | 3.75 [3, 4] | 4.08 [4, 5] | 3.75 [3, 5] | 4.67 [4, 5] | 5.00 [5, 5]† | <0.001 | |
| 80 kVp, 20 mAs | 3.42 [3, 4] | 3.83 [3, 5] | 4.33 [4, 5] | 3.17 [3, 4] | 4.17 [3, 5] | 4.75 [4, 5]† | <0.001 | |
| 80 kVp, 50 mAs | 3.42 [3, 4] | 3.83 [3, 5] | 4.25 [4, 5] | 3.92 [3, 5] | 4.58 [3, 5] | 4.83 [4, 5]† | <0.001 | |
| 100 kVp, 20 mAs | 3.67 [3, 4] | 3.50 [3, 4] | 4.42 [4, 5] | 3.92 [3, 5] | 4.58 [4, 5] | 4.83 [4, 5]† | <0.001 | |
| 100 kVp, 50 mAs | 3.67 [3, 4] | 4.08 [4, 5] | 4.17 [4, 5] | 4.08 [3, 5] | 4.58 [4, 5] | 4.83 [4, 5]† | <0.001 | |
| 120 kVp, 20 mAs | 3.50 [3, 5] | 3.83 [3, 4] | 4.17 [3, 5] | 3.92 [3, 5] | 4.58 [4, 5] | 4.83 [4, 5]† | <0.001 | |
| 120 kVp, 50 mAs | 3.75 [3, 4] | 4.00 [3, 5] | 4.33 [4, 5] | 4.33 [4, 5] | 4.75 [4, 5] | 4.75 [4, 5]† | <0.001 | |
| Total | 3.63 [2, 4] | 3.93 [2, 5] | 4.24 [3, 5] | 3.93 [2, 5] | 4.54 [3, 5] | 4.90 [4, 5]† | <0.001 | |
Evaluation results are expressed as mean [min, max]. *, CTDIvol values were 0.24, 0.63, 0.38, 0.96, 0.61, 1.53, 0.99 and 2.47 mGy for (70 kVp, 20 mAs), (70 kVp, 50 mAs), (80 kVp, 20 mAs), (80 kVp, 50 mAs), (100 kVp, 20 mAs), (100 kVp, 50 mAs), (120 kVp, 2 mAs), and (120 kVp, 50 mAs), respectively; †, highest value. ASiR-V, adaptive statistical iterative reconstruction; CTDIvol, volume computerized tomography dose index; DLIR, deep learning-based image reconstruction.