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Fig. 4. —62-year-old man with arterial hypertension (190 over 95 mm Hg) and suspected renal artery stenosis. Three-dimensional anteroposterior fast low-angle shot MR angiogram (3.8/1.49 [TR/TE], 25° flip angle, 10-sec acquisition time, 1.5-mm partition thickness) of first measurement after power injection of contrast material followed by saline solution reveals significant stenosis of upper left accessory renal artery (open arrow) correctly detected and graded by all four observers. Note significant stenosis (solid arrow) of left renal artery (mean value of all four observers was 62.3%). Degree of stenosis was confirmed on additional views (not shown). Note no stenosis in right renal artery (mean value of all four observers was 6.7%).