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Fig. 1B. —76-year-old man with severe hypertension. Radiologic investigation revealed discrepancy between MR angiography and catheter angiography. Maximum-intensity-projection reconstruction obtained from gadolinium-enhanced MR angiography shows bilateral renal artery stenoses. However, degree of stenosis was overestimated as compared with catheter angiography. Right renal artery stenosis (long arrow) was considered meaningful using 70% threshold by second investigator (investigator 1, 63%; investigator 2: 71%) and left renal artery stenosis (short arrow) was considered meaningful using 70% threshold by first investigator (investigator 1: 75%; investigator 2: 61%), thus resulting in false-positive results for gadolinium-enhanced MR angiography.