Summary of motion artifact grading scores for MRI and dual-energy CTa
| 1 | 2 | 3 | 4 | 5 | Mean Score (SE) | P Value | |
|---|---|---|---|---|---|---|---|
| All patients (n = 55) | <.001b | ||||||
| MRI | 0 | 3 | 48 | 4 | 0 | 3.02 (0.05) | |
| Dual-energy CT | 0 | 0 | 0 | 46 | 9 | 4.16 (0.05) | |
| T1 or T2 stage (n = 6) | .050 | ||||||
| MRI | 0 | 0 | 3 | 3 | 0 | 3.50 (0.22) | |
| Dual-energy CT | 0 | 0 | 0 | 4 | 2 | 4.33 (0.21) | |
| T3 stage (n = 13) | <.001b | ||||||
| MRI | 0 | 1 | 11 | 1 | 0 | 3.00 (0.11) | |
| Dual-energy CT | 0 | 0 | 0 | 12 | 1 | 4.08 (0.08) | |
| T4a stage (n = 36) | <.0001b | ||||||
| MRI | 0 | 2 | 34 | 0 | 0 | 2.94 (0.04) | |
| Dual-energy CT | 0 | 0 | 0 | 30 | 6 | 4.17 (0.06) |
Note:—SE indicates standard error.
↵a Data are number of patients. The rating grade is as follows: grade 1, nondiagnostic with major artifacts; grade 2, major artifacts with most organs depicted with diagnostic image quality; grade 3, moderate artifacts with image quality low but diagnostic; grade 4, minor artifacts with good image quality; grade 5, no artifacts with excellent image quality.
↵b Indicates a significant difference using the Wilcoxon signed rank test (P < .05).