False-negative and False-positive Diffusion-weighted MR Findings in Acute Ischemic Stroke and Stroke-like Episodes
نویسندگان
چکیده
منابع مشابه
False-negative diffusion-weighted MR findings in acute ischemic stroke.
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...
متن کاملDiffusion-Weighted MR Imaging and Ischemic Stroke
Magnetic resonance imaging (MR) of ischemic cerebrovascular events with standard T1and T2-weighted spin-echo techniques is widely employed. Standard MR demonstrates vascular changes such as the absence of a flow void and the presence of arterial enhancement within 2-4 hours of ischemic stroke onset in some cases ( 1 ). The earliest morphologic change in the brain parenchyma, swelling, is visibl...
متن کاملCase Report of False-Negative Diffusion-Weighted Image of Brain Magnetic Resonance Imaging (MRI) in Acute Ischemic Stroke
BACKGROUND Acute ischemic stroke is a major cause of mortality and morbidity in Taiwan. Diffusion-weighted image (DWI) is a sensitive and common strategy used for imaging acute ischemic stroke. CASE REPORT We present a case of a negative DWI MRI for detecting acute ischemic stroke in a clinical setting. A 75-year-old male had a DWI performed after onset of symptoms suggesting acute ischemic str...
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Introduction: Swallowing dysfunction complicates acute strokes in 25-32% of cases and directly affects patientschr('39') prognosis and recovery. Dysphagia complicates the course of acute strokes through its potential of the development of chest infection, nutritional problems, and dehydration. Dysphagia is also an independent predictor of respiratory morbidity and mortality in acute stroke. In...
متن کاملTurbo spin-echo diffusion-weighted MR of ischemic stroke.
PURPOSE Our objective was to determine whether a multisection technique, diffusion-weighted half-Fourier single-shot turbo spin-echo (HASTE) imaging, can compensate for the drawbacks common to other diffusion-weighted techniques; specifically, the need for echo-planar technology and the presence of susceptibility artifacts in areas close to the skull base. METHODS Forty subjects who were refe...
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ژورنال
عنوان ژورنال: Journal of Rural Medicine
سال: 2005
ISSN: 1880-487X,1880-4888
DOI: 10.2185/jrm.1.27