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TABLE 3: 
Categorized degree of stenosis on DUS and DSA. All 98 carotid arteries in this table were recognized as flow voids on MRA
Categories of Stenosis at DUSCategories of Stenosis at DSA
0–49%50–69%70–99%100%Total
0–49%00000
50–69%01203
70–99%31079193
100%00112
Total31182298