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Advantages of Adding Diffusion-Weighted Magnetic Resonance Imaging to Conventional Magnetic Resonance Imaging for Evaluating Acute Stroke Arch Neurol 57:1311-1316, Lansberg,M.G. et al, 2000 See this aricle in Pubmed Article Abstract Conventional MRI correctly identified at least one acute lesion in 71% (34/48) to 80% (39/49) of patients who had an acute stroke; with the addition of DWI, this percentage increased to 94% (46/49) (P<.001). Conventional MRI showed only moderate sensitivity (50%-60%) and specificity (49%-69%) compared with a "criterion standard." Based on the diffusion-weighted sequence, interrater reliability for identifying acute lesions was moderate for conventional MRI (K = 0.5-0.6) and good for DWI (K= 0.8). The observers' confidence with which lesions were rated as acute and the lesion conspicuity was significantly (P<.01) higher for DWI than for conventional MRI. During the first 48 hours after symptom onset, the addition of DWI to conventional MRI improves the accuracy of identifying acute ischemic brain lesions in patients who experienced a stroke.

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(click to filter results - removes previous filter) cerebrovascular accident cerebrovascular accident,work up for interobserver agreement MRI MRI,abnormal MRI,diffusion weighted MRI,early changes in CVA MRI,false negative

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