Table 2. The sensitivity, specificity and accuracy of greyscale sonography (GSS), colour Doppler sonography (CDS) and spectral Doppler (SPD) alone and in combination.
| Technique | Variable | Sensitivity | Specificity | Accuracy |
| GSS | Border | 87.5% | 82.1% | 84% |
| Homogeneity | 50% | 57.2% | 55% | |
| Shape | 62.5% | 57.2% | 59% | |
| Lymph nodes | 87.5% | 82.1% | 84% | |
| Combination | 87.5% | 34% | 59% | |
| CDS | Vascularity grade | 75% | 83% | 80% |
| Vascularity distribution | 100% | 68% | 80% | |
| Combination | 100% | 67% | 81% | |
| SPD | PSV | 87.5% | 85.7% | 86% |
| RI | 100% | 85.7% | 91% | |
| PI | 100% | 85.7% | 91% | |
| Combination | 100% | 67% | 81% | |
| GSS, CDS, SPD | 100% | 16.7% | 54.5% | |
PSV peak systolic velocity; RI, resistive index; PI, pulsatility index