Comparison between CS-TOF and PI-TOF for evaluating intracranial arterial stenosis
| Variables | CS-TOF | PI-TOF | P Value |
|---|---|---|---|
| Diagnostic qualitya | .046 | ||
| Grade 3 | 20 (90.9%) | 17 (77.3%) | |
| Grade 2 | 2 (9.1%) | 4 (18.2%) | |
| Grade 1 | 0 (0.0%) | 1 (4.5%) | |
| Grade 0 | 0 (0.0%) | 0 (0.0%) | |
| Stenosis visualizationb | .025 | ||
| Grade 2 | 48 (100.0%) | 43 (89.6%) | |
| Grade 1 | 0 (0.0%) | 5 (10.4%) | |
| Grade 0 | 0 (0.0%) | 0 (0.0%) | |
| Luminal stenosis ratio (mean ± SD) | 57.9% ± 30.5% | 58.9% ± 31.0% | .241 |
| Edge sharpness of artery (mean ± SD) | 0.358 ± 0.038 | 0.267 ± 0.042 | <.001 |
↵a The diagnostic quality of the CS-TOF and PI-TOF images was graded on an ordinal scale from 0 to 3, with 0 indicating completely blurred arteries and severe artifacts; 1 indicating partially obscured arteries and moderate artifacts; 2 indicating good and clear arteries and slight artifacts; and 3 indicating excellent arteries and no artifacts.
↵b The visualization of arterial stenosis was graded as follows: grade 2, definite stenosis and sufficiently recognized, high confidence; grade 1, probable stenosis, moderately confident; grade 0, low confidence.