نتایج جستجو برای: physical penumbra
تعداد نتایج: 666538 فیلتر نتایج به سال:
Objective: To evaluate the capabilities of Olea Sphere automated software for quantitative assessment ischemic damage to brain parenchyma during computed tomography (CT) in patients with acute cerebrovascular accident and its role choosing optimal treatment strategy everyday clinical practice. Materials methods: We retrospectively analyzed data from 129 suspected stroke who underwent perfusion ...
The ischemic penumbra was defined by Astrup et al 1 as brain tissue perfused at a level within the thresholds of functional impairment and morphological integrity, which has the capacity to recover if perfusion is improved. Because tolerance of tissue to ischemic damage is dependent on residual flow and duration of flow disturbance,2 the ischemic penumbra characterizes a transient condition: it...
BACKGROUND AND PURPOSE The ischemic penumbra is a major focus of stroke research. 18F-fluoromisonidazole (18F-FMISO), a positron emission tomography (PET) marker of hypoxic cells, has shown promise as a technique to image the penumbra in humans. Our aim was to delineate the pattern of 18F-FMISO binding in a rat middle cerebral artery transient thread-occlusion model, and correlate this with tis...
BACKGROUND AND PURPOSE Previous data have shown the feasibility of identifying ischemic penumbra in patients with acute stroke by using a semiautomated analysis of ADC maps. Here, we investigated whether the fate of ADC-defined penumbra was altered by HG. We also examined the interaction between HG and arterial recanalization on infarct growth. MATERIALS AND METHODS We examined 94 patients by...
BACKGROUND AND PURPOSE In acute stroke, CTP is often used to visualize the endangered brain areas, including the ischemic core and the penumbra. Our goal was to assess the evolution of the infarct after mechanical thrombectomy and to analyze the interventional factors determining the fate of the penumbra. MATERIALS AND METHODS All patients receiving mechanical thrombectomy in the anterior cir...
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