Time-resolved 3D contrast-enhanced MRA with GRAPPA on a 1.5-T system for imaging of craniocervical vascular disease: initial experience

Neuroradiology
Stephan MeckelStephan G Wetzel

Abstract

For three-dimensional (3D) imaging with magnetic resonance angiography (MRA) of the cerebral and cervical circulation, both a high temporal and a high spatial resolution with isovolumetric datasets are of interest. In an initial evaluation, we analyzed the potential of contrast-enhanced (CE) time-resolved 3D-MRA as an adjunct for neurovascular MR imaging. In ten patients with various cerebrovascular disorders and vascularized tumors in the cervical circulation, high-speed MR acquisition using parallel imaging with the GeneRalized Autocalibrating Partially Parallel Acquisitions (GRAPPA) algorithm on a 1.5-T system with a temporal resolution of 1.5 s per dataset and a nearly isovolumetric spatial resolution was applied. The results were assessed and compared with those from conventional MRA and digital subtraction angiography (DSA). CE time-resolved 3D-MRA enabled the visualization and characterization of high-flow arteriovenous shunts in cases of vascular malformations or hypervascularized tumors. In steno-occlusive disease, the method provided valuable additional information about altered vessel perfusion compared to standard MRA techniques such as time-of-flight (TOF) MRA. The use of a nearly isovolumetric voxel size allowed a...Continue Reading

References

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Citations

Jul 24, 2008·Investigative Radiology·Johannes T HeverhagenPetra Schmalbrock
Jan 25, 2008·Cerebrovascular Diseases·Stephan MeckelStephan G Wetzel
Nov 1, 2008·The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques·Manraj K S HeranSam D Shemie
May 14, 2008·Magnetic Resonance Imaging Clinics of North America·Derek G LohanJ Paul Finn
Aug 13, 2009·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Lan GeDebiao Li
Aug 30, 2008·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Clifton R HaiderStephen J Riederer
Sep 9, 2008·Journal of Magnetic Resonance Imaging : JMRI·Francesco SantiniStephan G Wetzel
Apr 24, 2009·Journal of Magnetic Resonance Imaging : JMRI·Jan Beranek-ChiuBoris P Eckhardt
Aug 18, 2010·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Clifton R HaiderStephen J Riederer
Jun 22, 2010·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Lan GeDebiao Li
Jun 1, 2010·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Hyun J JeongTimothy J Carroll
Jul 31, 2013·Journal of Magnetic Resonance Imaging : JMRI·Eric G StinsonStephen J Riederer
Mar 2, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Paul T WeaversStephen J Riederer
Jun 3, 2015·Journal of Magnetic Resonance Imaging : JMRI·Stephen J RiedererPhillip M Young
Nov 2, 2011·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Jin Woo ChoiHyun-Seung Kang

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