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AJNR Am J Neuroradiol. 2016 Sep;37(9):1669-72. doi: 10.3174/ajnr.A4786. Epub 2016 May 5.

Ventricular Microaneurysms in Moyamoya Angiopathy Visualized with 7T MR Angiography.

Author information

1
From the Departments of Neurosurgery (T.M., U.S., K.H.W.) Department of Neurosurgery (T.M.), Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany Toshinori.Matsushige@uk-essen.de karsten.wrede@uk-essen.de.
2
Department of Neurology (M.K., P.B.), Alfried Krupp Hospital, Essen, Germany.
3
Diagnostic and Interventional Radiology and Neuroradiology (M.S., M.F.), University Hospital Essen, University Duisburg-Essen, Essen, Germany Department of Neuroradiology (M.S.), University Hospital Giessen, Giessen, Germany.
4
Diagnostic and Interventional Radiology and Neuroradiology (M.S., M.F.), University Hospital Essen, University Duisburg-Essen, Essen, Germany.
5
Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany Division of Medical Physics in Radiology (M.E.L.), German Cancer Research Center, Heidelberg, Germany.
6
From the Departments of Neurosurgery (T.M., U.S., K.H.W.).
7
From the Departments of Neurosurgery (T.M., U.S., K.H.W.) Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany.

Abstract

The pathophysiologic role of hemodynamic alteration to peripheral vessels in Moyamoya angiopathy and the formation of microaneurysms remains unclear. The purpose of this study was to investigate microaneurysms in collateral Moyamoya vessels by using 7T ultra-high-field MR imaging. Ten patients with Moyamoya disease were evaluated with TOF-MRA at 7T acquired with 0.22 × 0.22 × 0.41 mm(3) resolution. In 10 patients, 4 microaneuryms located in the ventricles were delineated. The mean diameters of collateral vessels and microaneurysms arising from those vessels were 0.87 mm (range, 0.79-1.07 mm) and 0.80 mm (range, 0.56-0.96 mm), respectively. In 1 case with follow-up scans 6 months after a direct extracranial-intracranial bypass operation, the microaneurysm disappeared. Ventricular microaneurysms in Moyamoya angiopathy collateral vessels, inaccessible by conventional imaging techniques, can be detected by 7T TOF-MRA.

PMID:
27151748
DOI:
10.3174/ajnr.A4786
[Indexed for MEDLINE]
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