RT Journal Article
SR Electronic
T1 Ventricular Microaneurysms in Moyamoya Angiopathy Visualized with 7T MR Angiography
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1669
OP 1672
DO 10.3174/ajnr.A4786
VO 37
IS 9
A1 T. Matsushige
A1 M. Kraemer
A1 M. Schlamann
A1 P. Berlit
A1 M. Forsting
A1 M.E. Ladd
A1 U. Sure
A1 K.H. Wrede
YR 2016
UL http://www.ajnr.org/content/37/9/1669.abstract
AB 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.MMAMoyamoya angiopathy