Multiphase Arterial @entity7959 Labeling Assessment of Cerebral Perfusion Changes Associated with XXXX .

@entity1 @entity2500 @entity2791 @entity7959 @entity850 @entity1054
RATIONALE AND OBJECTIVES: To assess the sensitivity and utility of multiphase pulsed arterial @entity7959 labeling (PASL) in detecting dynamic changes of cerebral perfusion in the presence of a @entity2500 ( @entity2500 ) severe @entity850 . MATERIALS AND METHODS: Seventeen @entity1 with severe stenoses in unilateral M1 segment of @entity2500 were involved in this study. All @entity1 underwent multiphase PASL imaging. Bilateral basal ganglia were drawn by hand as regions of interest (ROIs) on eight-phase images of each @entity1 . The signal intensities of ROIs were measured and the @entity1054 ( @entity1054 ) were acquired through postprocessing on a magnetic resonance workstation. Whether there was a significant difference in the peak signal intensities of ROIs between the narrowed and normal sides was determined by the paired samples t test. RESULTS: Three types of @entity1054 were observed: eight cases with platform type, five cases with two-peak type, and four cases with single-peak type. There was a significant difference in the peak signal intensities of ROIs between the narrowed and normal sides. CONCLUSIONS: Different types of @entity1054 represent different cerebral hemodynamic changes. Multiphase PASL can sensitively detect the dynamic characteristics of cerebral perfusion and provide important dynamic perfusion information for clinical treatment of @entity2791 .
