This study investigated the feasibility of 3D PCASL to detect crossed cerebellar diaschisis (CCD) in patients with unilateral supratentorial subacute stroke using two PLD method and correlated the ischemic perfusion with CCD to identify the relevant imaging factors of CCD development. 3D PCASL can detect CCD in patients of supratentorial subacute stroke. Patients of supratentorial subacute stroke experience late-arriving flow while CCD+ patients suffer late arriving flow in the affected contralateral cerebellum. CCD+ patients may have a propensity towards more hemodynamic compromise and compensatory collateral flow in the cerebellum.
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