US features | Abbreviations | Characteristics |
---|---|---|
Composition | Composition | Cystic |
Echo pattern (in comparison to thyroid parenchyma) | Echo-Pa | Isoechoic |
Dominating echo pattern (in comparison to thyroid parenchyma) | Echo-Pb | Hyperechoic |
Echo pattern (in comparison to muscles) | Echo-M | Hyperechoic |
Margins | Margins | Well-defined |
“Halo” pattern | “Halo” | Complete |
Extrathyroidal extension | Capsule | Models thyroid shape and capsule |
Macrocalcifications (>1 mm) | Macro | Present |
Microcalcifications (≤1 mm) | Micro | Present |
Vascularity | Vascularity | Peripheral |
Elasticity score (Asteria Scale) | Asteria Scale | 1 – Elasticity in the whole examined area |
Remaining thyroid parenchyma | Parenchyma | Homogeneous |
Autoimmune thyroiditis | AT | Present |
Parenchyma vascularity | Parenchyma vascularity | Normal |
Description | Intra-observer agreement | Inter-observer agreement | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Observer 1 | Observer 2 | Observer 3 | Observer 4 | Observer 5 | |||||||
Agreement (%) | K-value (SE) | Agreement (%) | K-value (SE) | Agreement (%) | K-value (SE) | Agreement (%) | K-value (SE) | Agreement (%) | K-value (SE) | K-value (SE) | |
Composition | 95.0 | 0.88 (0.12) | 100.0 | 1.00 (0.00) | 90.0 | 0.83 (0.11) | 95.0 | 0.91 (0.09) | 90.0 | 0.75 (0.17) | 0.55 (0.04) |
Echo-Pa | 75.0 | 0.57 (0.16) | 100.0 | 1.00 (0.00) | 90.0 | 0.83 (0.11) | 100.0 | 1.00 (0.00) | 75.0 | 0.53 (0.17) | 0.48 (0.04) |
Echo-Pb | 85.0 | 0.69 (0.16) | 95.0 | 0.91 (0.09) | 95.0 | 0.89 (0.11) | 100.0 | 1.00 (0.00) | 80.0 | 0.52 (0.21) | 0.50 (0.05) |
Echo-M | 90.0 | 0.80 (0.14) | 100.0 | 1.00 (0.00) | 100.0 | 1.00 (0.00) | 95.0 | 0.84 (0.16) | 90.0 | 0.67 (0.18) | 0.49 (0.04) |
Margins | 85.0 | 0.70 (0.16) | 95.0 | 0.90 (0.10) | 95.0 | 0.88 (0.12) | 95.0 | 0.88 (0.12) | 85.0 | 0.63 (0.20) | 0.39 (0.05) |
“Halo” | 80.0 | 0.68 (0.13) | 85.0 | 0.76 (0.12) | 85.0 | 0.77 (0.12) | 90.0 | 0.67 (0.19) | 75.0 | 0.62 (0.14) | 0.41 (0.04) |
Capsule | 80.0 | 0.64 (0.17) | 95.0 | 0.91 (0.09) | 85.0 | 0.72 (0.15) | 80.0 | 0.59 (0.18) | 75.0 | 0.50 (0.19) | 0.40 (0.04) |
Macro | 100.0 | 1.00 (0.00) | 95.0 | 0.83 (0.17) | 95.0 | 0.64 (0.33) | 100.0 | 1.00 (0.00) | 95.0 | 0.64 (0.33) | 0.61 (0.05) |
Micro | 95.0 | 0.89 (0.11) | 95.0 | 0.90 (0.10) | 90.0 | 0.77 (0.15) | 90.0 | 0.78 (0.14) | 90.0 | 0.74 (0.17) | 0.57 (0.05) |
Vascularity | 90.0 | 0.86 (0.10) | 90.0 | 0.74 (0.16) | 100.0 | 1.00 (0.00) | 95.0 | 0.85 (0.13) | 95.0 | 0.87 (0.13) | 0.34 (0.03) |
Asteria Scale | 78.9 | 0.71 (0.13) | 78.9 | 0.70 (0.13) | 94.7 | 0.92 (0.08) | 73.7 | 0.61 (0.15) | 73.7 | 0.65 (0.13) | 0.33 (0.03) |
Parenchyma | 75.0 | 0.50 (0.19) | 85.0 | 0.69 (0.16) | 100.0 | 1.00 (0.00) | 95.0 | 0.89 (0.10) | 90.0 | 0.69 (0.20) | 0.40 (0.05) |
AT | 95.0 | 0.88 (0.12) | 80.0 | 0.47 (0.23) | 95.0 |
|
95.0 | 0.64 (0.33) | 100.0 | 1.00 (0.00) | 0.25 (0.05) |
Parenchyma vascularity | 80.0 | 0.64 (0.16) | 85.0 | 0.66 (0.17) | 95.0 | 0.92 (0.08) | 85.0 | 0.71 (0.15) | 75.0 | 0.17 (0.26) | 0.18 (0.04) |
Average | 86.0 | 0.74 | 91.4 | 0.82 | 93.6 | 0.86 | 92.0 | 0.81 | 84.9 | 0.64 | 0.42 |
Description | Accuracy (%) | ||||
---|---|---|---|---|---|
Observer 1 | Observer 2 | Observer 3 | Observer 4 | Observer 5 | |
Composition | 92.5 | 95.0 | 77.5 | 72.5 | 90.0 |
Echo-Pa | 80.0 | 80.0 | 90.0 | 90.0 | 82.5 |
Echo-Pb | 92.5 | 82.5 | 87.5 | 95.0 | 87.5 |
Echo-M | 87.5 | 95.0 | 90.0 | 92.5 | 97.5 |
Margins | 82.5 | 87.5 | 72.5 | 82.5 | 92.5 |
“Halo” | 85.0 | 87.5 | 82.5 | 65.0 | 87.5 |
Capsule | 87.5 | 85.0 | 80.0 | 92.5 | 92.5 |
Macro | 100.0 | 92.5 | 97.5 | 90.0 | 97.5 |
Micro | 100.0 | 92.5 | 85.0 | 87.5 | 95.0 |
Vascularity | 65.0 | 95.0 | 85.0 | 97.5 | 75.0 |
Asteria Scale | 78.9 | 86.8 | 68.4 | 47.4 | 73.7 |
Parenchyma | 82.5 | 82.5 | 80.0 | 87.5 | 65.0 |
AT | 77.5 | 80.0 | 92.5 | 97.5 | 100.0 |
Parenchyma vascularity | 75.0 | 87.5 | 70.0 | 77.5 | 85.0 |
Average | 84.7 | 87.8 | 82.7 | 83.9 | 87.2 |