期刊
RADIOLOGY
卷 227, 期 3, 页码 890-896出版社
RADIOLOGICAL SOC NORTH AMERICA
DOI: 10.1148/radiol.2273020227
关键词
arteries, MR; arteries, peripheral; magnetic resonance (MR), vascular studies; veins, MR
The authors evaluated a nonenhanced magnetic resonance (MR) angiographic technique that allows separation of arteries from veins. In 15 healthy subjects, peripheral MR angiography was performed with read-out flow-spoiled gradient pulses in electrocardiography-triggered three-dimensional half-Fourier fast spin-echo MR imaging. Appropriate flow-spoiled gradient pulses were measured and applied in the three-dimensional acquisition to differentiate arteries and veins in the peripheral vasculature. Subtraction of the diastolic bright-blood arteries from the systolic black-blood arteries allowed visualization of the arteries by cancelling the veins, which are constantly depicted as bright blood throughout the cardiac cycle. Stronger flow-spoiled gradient pulses improved the depiction of slow-flow arteries even in the distal foot and hand vessels. (C) RSNA, 2003.
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