BACKGROUND AND PURPOSE: The “ivy” sign that is identified on FLAIR images in
patients with Moyamoya disease is considered to be leptomeningeal collaterals. The aim of …

Background Leptomeningeal high signal intensity (ivy sign) on fluid-attenuated inversion-
recovery (FLAIR) MR imaging is one of the features of Moyamoya disease. However, the …

Background and Purpose—The ivy sign on fluid-attenuated inversion recovery MRI is a
specific finding in moyamoya disease (MMD). This sign indicates decreased cerebral …

BACKGROUND AND PURPOSE: An ivy sign is considered to represent diffuse
leptomeningeal collaterals found on fluid-attenuated inversion recovery (FLAIR) images of …

BACKGROUND AND PURPOSE: The ability of the ivy sign on contrast-enhanced T1-
weighted MR imaging (CEMR) to reflect cerebral perfusion and postoperative …

Objective MR perfusion and single photon emission computerized tomography (SPECT) are
well known imaging studies to evaluate hemodynamic change between prior to and …

BACKGROUND AND PURPOSE: Moyamoya disease is an idiopathic occlusive
cerebrovascular disorder with abnormal microvascular proliferation. We investigated the …

OBJECTIVE Transient neurological symptoms are frequently observed during the early
postoperative period after direct bypass surgery for moyamoya disease. Abnormal signal …

Objective Although uncommon, subcortical low-intensity (SCLI) changes on fluid-attenuated
inversion recovery images are observed in various diseases, including cerebral ischemia …

Background Moyamoya disease often is treated by revascularization surgery. In this report,
we are the first to describe a case of moyamoya disease that repeatedly showed a transient …