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Abstract #4412

Magnetic Resonance Imaging of Collateral Networks in Moyamoya Angiopathy at 7 Tesla

Bixia Chen1,2, Toshinori Matsushige2,3, Markus Kraemer4, Philipp Dammann1,2, Sören Johst1, Stefan Maderwald1, Marc Schlamann5, Harald H Quick1,6, Mark Edward Ladd1,7, Ulrich Sure2, and Karsten H Wrede1,2

1Erwin L. Hahn Institute for MRI, University of Duisburg-Essen, Essen, Germany, 2Department of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany, 3Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan, 4Department of Neurology, Alfried Krupp Hospital, Essen, Germany, 5Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Giessen, Giessen University, Giessen, Germany, 6High Field and Hybrid MR Imaging, University Hospital Essen, University of Duisburg-Essen, Essen, Germany, 7Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany

Collateral networks in Moyamoya angiopathy (MMA) have a complex angioarchitecture. Delineation of deeply seated collateral networks (DSCNs) and image quality were prospectively evaluated in 10 patients using 7 Tesla TOF MRA and MPRAGE in comparison with conventional DSA. Seventy DSCNs were detected in DSA, 79 in TOF MRA, and 54 in MPRAGE. Detection of DSCNs was significantly better in TOF MRA than in DSA and MPRAGE. TOF MRA and DSA image quality were comparable, both were better than MPRAGE. Delineation of DSCN pathways in MMA using 7 Tesla TOF MRA was excellent and comparable to DSA.

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