False-negative diffusion-weighted imaging in large vessel territory infarct
نویسندگان
چکیده
منابع مشابه
False-negative diffusion-weighted imaging with lateral medullary infarction.
A 55-year-old1 man awoke with left ear pain, vertigo, vomiting, left facial numbness, and ataxic gait. MRI including diffusionweighted imaging (DWI) performed 2 hours later showed no evidence of acute infarction (figure, A). Repeat MRI 2 days later showed DWI and FLAIR changes consistent with a left lateral medullary infarction (figure, B). False-negative DWI has been reported in 5% of ischemic...
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BACKGROUND AND PURPOSE Lesions associated with acute stroke are often missed by diffusion-weighted imaging (DWI), suggesting that the sensitivity of this technique for detecting acute ischemic stroke may not be as high as initially thought. Our aim was to estimate the rate of false-negative DWI studies in patients with persistent neurologic deficit due to an ischemic stroke and to identify whic...
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A81-year-old man with multiple cardiovascular risk factors presented to the emergency department with true vertigo, binocular horizontal diplopia and ataxic gate 5 hours after onset of symptoms. He was alert and his general and neurological exam was unremarkable except for his ocular motility and gait. On left lateral gaze, he had limited adduction in right eye, but left eye was fully abducting...
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BACKGROUND AND PURPOSE Some infarcts have persistently hyperintense areas on diffusion-weighted MRI (DWI) even at 1 month after stroke, whereas others have become isointense to normal brain. We hypothesized that late DWI hyperintensity reflected different infarct evolution compared with areas that were isointense by 1 month. METHODS We recruited patients prospectively with ischemic stroke, pe...
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BACKGROUND AND PURPOSE The absence of acute ischemic lesions in diffusion-weighted imaging (DWI) in transient ischemic attack (TIA) patients makes it difficult to diagnose the true vascular etiologies. Among patients with DWI-negative TIA, we investigated whether the presence of a perfusion-weighted imaging (PWI) abnormality implied a true vascular event by identifying new acute ischemic lesion...
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ژورنال
عنوان ژورنال: Journal of Medical Sciences
سال: 2019
ISSN: 1011-4564
DOI: 10.4103/jmedsci.jmedsci_49_18