FIG 5. Contrast-enhanced MR angiograms show left brachiocephalic vein stenosis (arrow).
A, Before subtraction of the arterial signals (in the third patient).
B, After subtraction of the arterial signals (in the first patient).
FIG 5. Contrast-enhanced MR angiograms show left brachiocephalic vein stenosis (arrow).
A, Before subtraction of the arterial signals (in the third patient).
B, After subtraction of the arterial signals (in the first patient).