Evaluation of Moyamoya Disease with MR Perfusion-Weighted Imaging

Objective to evaluation the blood supply of brain tissue of moyamoya disease with MR perfusion-weighted imaging(PWI).Methods The clinical and imaging data of 25 patients with moyamoya disease were analyzed retrospectively.All of the cases were performed with convention and perfusion-weighted MR imaging.The brain tissue flood perfusion were analyzed.Results Fourteen cases were normal in convention MR imaging,but bilateral middle cerebral artery(MCA) and/or distal artery of MCA were stegnosis or occlusion in all of the cases.Collateral vasoganglion were displayed in 22 cases,there were symmetry in 15 cases and were dissymmetry in other cases.Perfusion-weighted imaging revealed MTT(mean transit time) was extend 0.5s to 15s.23 cases showed decreased in rCBF(regional cerebral blood flow),the amplitude was 26% to 56.5%.There were 9 cases of normal and 16 with decreased in rCBV(regional cerebral blood volume).Conclusion MR perfusion-weighted imaging could appraise blood supply of brain tissue with moyamoya disease efficaciously.