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

  • Diagnostic Neuroradiology
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Abstract

Introduction: 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. Methods: 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). Results: 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 free-form interrogation of 3D datasets. Its comparatively low spatial resolution was found to be the major limitation. Conclusion: In this preliminary analysis, CE time-resolved 3D-MRA was revealed to be a promising complementary MRA sequence that enabled the visualization of contrast flow dynamics in various types of neurovascular disorders and vascularized cervical tumors.

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Authors and Affiliations

  1. Division of Neuroradiology/Department of Radiology, University Hospital Basel, Petersgraben 4, Basel, 4031, Switzerland

    Stephan Meckel, Christian Taschner, Sven Haller, Ernst-Wilhelm Radue & Stephan G. Wetzel

  2. MR Physics, Department of Medical Radiology, University Hospital Basel, Petersgraben 4, Basel, 4031, Switzerland

    Ralf Mekle & Klaus Scheffler

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  1. Stephan Meckel
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  2. Ralf Mekle
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  3. Christian Taschner
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  4. Sven Haller
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  5. Klaus Scheffler
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  6. Ernst-Wilhelm Radue
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  7. Stephan G. Wetzel
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Correspondence to Stephan Meckel.

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Meckel, S., Mekle, R., Taschner, C. et al. Time-resolved 3D contrast-enhanced MRA with GRAPPA on a 1.5-T system for imaging of craniocervical vascular disease: initial experience. Neuroradiology 48, 291–299 (2006). https://doi.org/10.1007/s00234-006-0052-9

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  • DOI: https://doi.org/10.1007/s00234-006-0052-9

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