Table 2.
Vascularity of thyroid nodules using color Doppler flow imaging (CDFI) and superb microvascular imaging (SMI).
| CDFI | SMI | |||||||
|---|---|---|---|---|---|---|---|---|
| Malignant | Benign | z | P | Malignant | Benign | z | P | |
| Vessel number | 3.195 | 0.001* | 4.176 | <0.001* | ||||
| Grade 0 | 4 (13.8%) | 16 (34.0%) | 1 (3.4%) | 14 (29.8%) | ||||
| Grade 1 | 4 (13.8%) | 13 (27.7%) | 2 (6.9%) | 8 (17.0%) | ||||
| Grade 2 | 5 (17.2%) | 9 (19.1%) | 3 (10.3%) | 11 (23.4%) | ||||
| Grade 3 | 16 (55.2%) | 9 (19.1%) | 23 (79.3%) | 14 (29.8%) | ||||
| Vessel morphology | 3.378 | 0.001* | 4.898 | <0.001* | ||||
| Linear | 8 (27.6%) | 21 (44.7%) | 4 (13.8%) | 20 (42.6%) | ||||
| Dot-like | 7 (24.1%) | 25 (53.2%) | 6 (20.7%) | 24 (51.1%) | ||||
| Branching | 2 (6.9%) | 1 (2.1%) | 1 (3.4%) | 2 (4.3%) | ||||
| Penetrating | 12 (41.4%) | 0 (0.0%) | 18 (62.1%) | 1 (2.1%) | ||||
| Vessel distribution | 0.245 | 0.806 | 0.209 | 0.835 | ||||
| Peripheral | 4 (13.8%) | 16 (34.0%) | 1 (3.4%) | 14 (29.8%) | ||||
| Central | 18 (62.1%) | 13 (27.7%) | 23 (79.3%) | 13 (27.7%) | ||||
| Both | 7 (24.1%) | 18 (38.3%) | 5 (17.2%) | 20 (42.6%) | ||||