Table 7. Correlation analysis between CEUS parameters and pathological grading.
| Parameters | Pathological Grading after NAC (n=22) | Contingency coefficient |
P | ||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |||
| AT | 20.00 | 10.00±6.78 | 9.38±4.14 | 9.00±1.00 | 8.00±4.32 | −0.09 | 0.704 |
| TTP | 30.00 | 20.50±7.48 | 18.63±4.87 | 16.67±2.31 | 17.00±4.76 | −0.32 | 0.148 |
| PI | 23.00 | 24.00±2.83 | 24.75±5.99 | 23.67±0.58 | 20.00±4.40 | −0.21 | 0.341 |
| k | 2.30 | 3.53±2.57 | 3.04±1.42 | 3.33±1.14 | 3.05±2.13 | 0.062 | 0.785 |
| AUC | 1,808 | 1,877.48±406.49 | 2,075.84±481.17 | 2,025.15±47.71 | 1,663.32±578.56 | −0.08 | 0.710 |
CEUS, contrast-enhanced ultrasonography; NAC, neoadjuvant chemotherapy; AT, arrive time, s; TTP, time to peak, s; PI, peak intensity, dB; k, arrival-peak slope; AUC, area under curve.