White matter thresholds for ischemic penumbra and infarct core in patients with acute stroke: CT perfusion study.

Purpose: To prospectively determine the parameters derived at admission computed tomographic (CT) perfusion imaging admission that best differentiate ischemic white matter that recovers from that which infarcts, with the latter retrospectively defined at a CT examination performed without contrast material (unenhanced CT) 5-7 days after the event.

Materials And Methods: Ethics committee approval and informed consent were obtained. Thirty patients with stroke underwent unenhanced CT, CT angiography, and CT perfusion studies at admission.

Endovascular coil embolization of intracranial aneurysms: important factors related to rates and outcomes of incomplete occlusion.

Object: The authors report on important factors that influenced clinical and angiographically demonstrated outcomes in patients treated using coil embolization.

Methods: This study included 160 consecutive patients who underwent endovascular coil embolization for treatment of intracranial aneurysms. Univariate and multivariate logistic regression analyses were performed to assess factors that influenced the immediate posttreatment angiographic result.