Resistance index in differential diagnosis of liver lesions by color doppler ultrasonography

Table 1 Histopathological type and tumor size distribution of liver tumors

Histological type	Size (mm)
	n (lesions)	< 30	30-60	> 60
Primary malignant tumor	596(651)	232	255	164
Metastatic tumor	48(57)	15	25	17
Hemangioma	62(86)	25	33	28
Fucal nodual hyperplasia	36(36)	19	16	1
Inflammatory pseudotumor	11(11)	6	5
Angiomyolipoma	14(17)	3	10	4
Cirrhotic nodules	11(11)	9	2
Tuberculosis	5(6)	4	2
Adenoma	3(4)	1		3
Abscess	3(3)	1	2
Lipoma	2(2)	1		1
Others	9(9)	2	5	2
Total	800(893)	316	357	220

Table 2 RI in different histopathological lesions (mean ± SD)

Histopathological type	RI range	RI means
Primary malignant tumor	0.34 - 1.0	0.75 ± 0.12b
Metastatic tumor	0.57 - 1.0	0.73 ± 0.09b
Hemangioma	0.45 - 0.77	0.55 ± 0.08
Fucal nodual hyperplasia	0.41 - 0.79	0.58 ± 0.10
Angiomyolipoma	0.38 - 0.71	0.52 ± 0.14
Cirrhotic nodules	0.57 - 0.59	0.58 ± 0.01
Inflammatory pseudotumor	0.49 - 0.55	0.54 ± 0.05

^bP < 0.001 vs different groups.

Table 3 Detection rates of arterial flow and RI in primary liver malignant tumors, stratified by tumor size (mean ± SD)

Diameter	< 30 (mm)	30 - 60 (mm)	> 60 (mm)	P
Detection rates (%)	87.93b(204/232)	93.3b (238/255)	97b (159/164)	< 0.01
RI	0.77 ± 0.12a	0.76 ± 0.11a	0.71 ± 0.12a	< 0.05

^aP < 0.05, vs RI diffrent datum groups,

^bP < 0.01 vs different rate groups.