The Value of Contrast-Enhanced Ultrasound versus Doppler Ultrasound in Grading Renal Artery Stenosis

Table 2

Number of renal artery stenosis classified as different grades.

	DSA	DUS	CEUS
Grade I	25	19	21
Grade II	36	31	34
Grade III	16	16	19
Grade IV	4	3	3

Data are reported as count. DSA: digital subtraction angiography; CEUS: contrast-enhanced ultrasound; DUS: Doppler ultrasound; grade I (stenosis rate: 30%-49%), grade II (stenosis rate: 50%-69%), grade III (stenosis rate: 70%-99%), and grade IV (stenosis rate: 100%).