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Published on: February 10, 2012
Non-Contrast Magnetic Resonance Angiography: Techniques, Principles, and Applications
Ananya Panda1, Christopher J Francois2, Candice A Bookwalter2
1Department of Radiology, All India Institute of Medical Sciences, Jodhpur, India.
Abstract:
Several non-contrast magnetic resonance angiography (MRA) techniques have been developed, providing an attractive alternative to contrast-enhanced MRA and a radiation-free alternative to computed tomography (CT) CT angiography. This review describes the physical principles, limitations, and clinical applications of bright-blood (BB) non-contrast MRA techniques. The principles of BB MRA techniques can be broadly divided into (a) flow-independent MRA, (b) blood-inflow-based MRA, (c) cardiac phase dependent, flow-based MRA, (d) velocity sensitive MRA, and (e) arterial spin-labeling MRA. The review also includes emerging multi-contrast MRA techniques that provide simultaneous BB and black-blood images for combined luminal and vessel wall evaluation.
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