Table 3. Qualitative analysis scores of FBP, ASIR-V, and DLIR images.
| mA | IR | Image contrast | Image noise | Nodule edge | Overall |
|---|---|---|---|---|---|
| 20 | FBP | 2.33 | 2.11 | 2.00 | 2.15 |
| 30%ASIR-V | 2.56 | 2.22 | 2.22 | 2.33 | |
| 50%ASIR-V | 2.56 | 2.44 | 2.33 | 2.44 | |
| 80%ASIR-V | 2.56 | 2.56 | 2.33 | 2.48 | |
| DLIR-L | 2.33 | 2.78 | 2.33 | 2.48 | |
| DLIR-M | 2.44 | 2.89 | 2.56 | 2.63 | |
| DLIR-H | 2.44 | 2.89 | 2.22 | 2.52 | |
| 30 | FBP | 2.56 | 2.33 | 2.44 | 2.44 |
| 30%ASIR-V | 2.56 | 2.56 | 2.44 | 2.52 | |
| 50%ASIR-V | 2.89 | 2.67 | 2.44 | 2.67 | |
| 80%ASIR-V | 3.11 | 3.11 | 2.67 | 2.96 | |
| DLIR-L | 2.44 | 2.67 | 2.44 | 2.52 | |
| DLIR-M | 3.00 | 3.00 | 2.56 | 2.85 | |
| DLIR-H | 2.78 | 3.33 | 2.89 | 3 | |
| 50 | FBP | 2.78 | 2.67 | 2.67 | 2.7 |
| 30%ASIR-V | 3.22 | 3.00 | 3.22 | 3.15 | |
| 50%ASIR-V | 3.33 | 3.56 | 3.33 | 3.41 | |
| 80%ASIR-V | 3.33 | 3.56 | 3.33 | 3.41 | |
| DLIR-L | 2.89 | 3.11 | 3.00 | 3.00 | |
| DLIR-M | 3.22 | 3.44 | 3.44 | 3.37 | |
| DLIR-H | 3.33 | 3.56 | 3.33 | 3.41 | |
| 70 | FBP | 2.78 | 2.67 | 2.67 | 2.7 |
| 30%ASIR-V | 3.00 | 2.89 | 3.00 | 2.96 | |
| 50%ASIR-V | 3.22 | 3.33 | 3.22 | 3.26 | |
| 80%ASIR-V | 3.22 | 3.33 | 3.22 | 3.26 | |
| DLIR-L | 3.00 | 3.00 | 3.00 | 3.00 | |
| DLIR-M | 3.44 | 3.44 | 3.44 | 3.44 | |
| DLIR-H | 3.33 | 3.67 | 3.44 | 3.48 | |
| 90 | FBP | 3.22 | 2.89 | 3.00 | 3.04 |
| 30%ASIR-V | 3.22 | 3.11 | 3.11 | 3.15 | |
| 50%ASIR-V | 3.44 | 3.56 | 3.56 | 3.52 | |
| 80%ASIR-V | 3.67 | 3.67 | 3.67 | 3.67 | |
| DLIR-L | 3.33 | 3.22 | 3.33 | 3.30 | |
| DLIR-M | 3.67 | 3.67 | 3.67 | 3.67 | |
| DLIR-H | 3.56 | 3.67 | 3.56 | 3.59 | |
| 100 | FBP | 3.11 | 3.11 | 3.11 | 3.11 |
| 30%ASIR-V | 3.22 | 3.22 | 3.11 | 3.19 | |
| 50%ASIR-V | 3.33 | 3.33 | 3.33 | 3.33 | |
| 80%ASIR-V | 3.56 | 3.67 | 3.67 | 3.63 | |
| DLIR-L | 3.22 | 3.22 | 3.11 | 3.19 | |
| DLIR-M | 3.44 | 3.56 | 3.54 | 3.48 | |
| DLIR-H | 3.56 | 3.89 | 3.56 | 3.67 | |
| 120 | FBP | 3.33 | 3.11 | 3.11 | 3.19 |
| 30%ASIR-V | 3.33 | 3.11 | 3.22 | 3.48 | |
| 50%ASIR-V | 3.44 | 3.44 | 3.44 | 3.67 | |
| 80%ASIR-V | 3.67 | 3.67 | 3.44 | 3.19 | |
| DLIR-L | 3.33 | 3.11 | 3.22 | 3.22 | |
| DLIR-M | 3.67 | 3.44 | 3.56 | 3.56 | |
| DLIR-H | 3.78 | 3.89 | 3.44 | 3.70 | |
| 150 | FBP | 3.89 | 3.56 | 3.56 | 3.67 |
| 30%ASIR-V | 3.89 | 3.56 | 3.56 | 3.67 | |
| 50%ASIR-V | 4.00 | 4.00 | 4.00 | 4.00 | |
| 80%ASIR-V | 4.00 | 4.00 | 4.00 | 4.00 | |
| DLIR-L | 3.89 | 3.56 | 3.56 | 3.67 | |
| DLIR-M | 4.00 | 4.00 | 4.00 | 4.00 | |
| DLIR-H | 4.00 | 4.00 | 4.00 | 4.00 |
FBP, filtered back projection; ASIR-V, adaptive statistical iterative reconstruction; DLIR-L/M/H, deep learning image reconstruction-low/medium/high.