Role of contrast-enhanced ultrasound in follow-up assessment after ablation for hepatocellular carcinoma

Table 2 Comparison between contrast-enhanced computed tomography and contrast-enhanced ultrasound in detecting local tumor progression after percutaneous ablation therapy for hepatocellular carcinoma during follow-up

CEUS	CECT
	All			< 3 cm			≥3 cm			Single			Multiple
	LTP	LTP-free	Total	LTP	LTP-free	Total	LTP	LTP-free	Total	LTP	LTP-free	Total	LTP	LTP-free	Total
LTP	27	6	33	18	4	22	9	2	11	15	5	20	12	1	13
LTP-free	13	220	233	10	165	175	3	55	58	3	74	76	10	146	156
Total	40	226	266	28	169	197	12	57	69	18	79	97	22	147	169
χ2	125.6			86.7			32.66			48.51			70.79
P value	< 0.001			< 0.001			< 0.001			< 0.001			< 0.001

Data show the numbers of the ablated lesions. LTP: Local tumor progression; CEUS: Contrast-enhanced ultrasound; CECT: Contrast-enhanced computed tomography.