FIG 2. Comparison of digital subtraction angiographic measurement of stenosis versus contrast-enhanced MR angiographic measurement of stenosis shows regression line with 95% mean confidence intervals, which reach a minimum of ±2.8%, showing excellent correlation between digital subtraction angiography and contrast-enhanced MR angiography in the mean. DSA, digital subtraction angiography; Gd-MRA, contrast-enhanced MR angiography.