Evaluation of Multimode Color Doppler Flow Imaging in the Diagnosis of Solid Renal Tumor

Table 2

Ring-like blood flow in 66 benign and malignant renal tumors by color Doppler flow imaging (CDFI), power Doppler flow imaging (PDFI), superb microvascular imaging (SMI), and contrast-enhanced ultrasound (CEUS).

Examination method	Ring-like blood flow		X^2
	+	−
CDFI			1.521	0.217
Benign	0	9
Malignant	9	48
PDFI			2.122	0.145
Benign	0	9
Malignant	12	45
SMI			9.823	0.003
Benign	1	8
Malignant	37	20
CEUS			9.157	0.001
Benign	1	8
Malignant	40	17

was calculated by Pearson’s χ² test.  < 0.05 was considered as statistical significance.