Table 3. Comparison of CEUS parameters between effective group and ineffective group.

Parameters	Effective group (n=7)	Ineffective group (n=21)	P
AT	8.42±3.15	10±4.85	0.432
TTP	16.86±3.63	19.24±5.70	0.312
PI	21.57±3.69	24.29±4.31	0.149
k	3.17±1.65	3.22±1.68	0.948
AUC	1,818.391±453.35	2,007.992±446.60	0.341

CEUS, contrast-enhanced ultrasonography; AT, arrive time, s; TTP, time to peak, s; PI, peak intensity, dB; k, arrival-peak slope; AUC, area under curve.