Table 3.
Qualitative intraobserver reproducibility of shear wave elasticity (SWE) related to homogeneity, shape and malignancy for 614 benign and 144 malignant breast masses
| Similarity score | Homogeneity c | Shape c | Malignancy c | |||||
|---|---|---|---|---|---|---|---|---|
| Very homogeneous N (%)a | Reasonably homogeneous N (%)a | Not homogeneous N (%)a | Oval N (%) | Round N (%) | Irregular N (%) | Benign N (%)a | Malignant N (%)a | |
| All images very similar | 341 (87.2) | 66 (31.1) | 26 (16.8) | 279 (66.1) | 12 (60) | 142 (44.9) | 395 (64.3) | 38 (26.4) |
| All images reasonably similar | 44 (11.3) | 110 (51.9) | 79 (51.0) | 108 (25.6) | 5 (25) | 120 (38.0) | 164 (26.7) | 69 (47.9) |
| Some images similarb | 5 (1.3) | 34 (16.0) | 45 (29.0) | 32 (7.6) | 3 (15) | 49 (15.5) | 52 (8.5) | 32 (22.2) |
| Images very dissimilar | 1 (0.3) | 2 (0.9) | 5 (3.2) | 3 (0.7) | 0 (0) | 5 (1.6) | 3 (0.5) | 5 (3.5) |
| Total | 391 | 212 | 155 | 422 | 20 | 316 | 614 | 144 |
a Percentages are column percentages for the similarity of three SWE acquisitions per mass
b “Some images similar” was used when two of the three images were similar
c P < 0.001 from Kruskal–Wallis one-way ANOVA