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Fig. 1A. —76-year-old man with severe hypertension. Radiologic investigation revealed discrepancy between MR angiography and catheter angiography. Catheter angiogram reveals bilateral renal artery stenosis. Right renal artery stenosis (arrow) was considered meaningful using 50% threshold and insignificant using 70% threshold (measurement of investigator 1: 54%; investigator 2: 64%). Similarly, left renal artery stenosis (arrowhead) was meaningful for 50% threshold and insignificant for 70% threshold (investigator 1: 58%; investigator 2: 54%).