Contrast-enhanced ultrasound in evaluating the curative effect of interventional therapy in patients with liver cancer

Table 4 Perfusion recovery of tumor area in patients

Time period	Complete response (%)	Partial response (%)	Stable lesions (%)	Progressive lesions (%)	χ2	P value
Before treatment	0	0	100	0
1 month after treatment	8.33	43.33	40	8.33	12.227	0.016
3 months after treatment	12.5	46.67	30	10.83	11.559	0.02
6 months after treatment	18.33	41.67	28.33	11.67	8.908	0.031

P < 0.05 indicates a significant difference.