MR angiography


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MR an·gi·og·ra·phy (MRA),

imaging of blood vessels using special magnetic resonance (MR) sequences that enhance the signal of flowing blood and suppress that from other tissues.

MR angiography

Magnetic resonance angiography, MRI angiography Imaging
A noninvasive method for evaluating the blood vessels of Pts with severe peripheral vascular disease or acute renal failure Pros Less time and cost than conventional catheter angiography without puncture; it is painless, no known complications, much more rapid than cerebral contrast angiography–CCA and allows construction of images in any plane; MRA is useful for imaging of ASHD and dissecting aneurysms of neck and intracranial aneurysms. See Magnetic resonance imaging.
References in periodicals archive ?
Multicenter, intraindividual comparison of single-dose gadobenate dimeglumine and double-dose gadopentetate dimeglumine for MR angiography of the supra-aortic arteries (the Supra-Aortic VALUE study).
Signal-to-noise (SNR) and contrast-to-noise (CNR) measurements were performed in data sets of the time-resolved MR angiography (TWIST) and high-resolution 3D FLASH imaging.
Walsh, "Time-resolved contrast-enhanced MR angiography of spinal vascular malformations," American Journal of Neuroradiology, vol.
Likewise, Figure 2 showing large hepatic cyst in right lobe of liver turned out to be portal vein aneurysm done by MR angiography.
This guide introduces the basics of magnetic resonance imaging, covering its physics from basic principles to more advanced topics, such as MR angiography and fast scanning techniques, and techniques made possible with high-performance gradients, such as echo planar imaging.
MR angiography revealed marked narrowing of supraclinoid and intracavernous portion of left internal carotid artery and nonvisualization of right middle cerebral artery and anterior cerebral (A-1 segment) arteries (fig-2).
CT angiography or MR angiography is commonly performed to demonstrate aneurysmal and nonaneurysmal changes including larger aneurysms and stenosis of the medium-sized vessels.
MR angiography showed incomplete occlusion of both VAs while the basilar artery is without thrombotic formations (Figure 1).
described the use of 3D time of flight MR angiography and demonstrated an accuracy of 86%, sensitivity of 91%, and a specificity of 81% in detection of aortic arch and aortic arch branch vessel lesions, as well as accurately determining severity of the lesion in comparison with angiography.
Phase-contrast MR angiography, a noninvasive MR based flow-related technique, was employed to acquire hemodynamic data in selected intra-abdominal vessels at baseline and after 4 weeks of NSBB therapy.