TY - JOUR T1 - Ventricular Microaneurysms in Moyamoya Angiopathy Visualized with 7T MR Angiography JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. DO - 10.3174/ajnr.A4786 AU - T. Matsushige AU - M. Kraemer AU - M. Schlamann AU - P. Berlit AU - M. Forsting AU - M.E. Ladd AU - U. Sure AU - K.H. Wrede Y1 - 2016/05/05 UR - http://www.ajnr.org/content/early/2016/05/05/ajnr.A4786.abstract N2 - SUMMARY: 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 mm3 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.AbbreviationMMAMoyamoya angiopathy ER -