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https://pubs.rsna.org/doi/abs/10.1148/radiology.210.1.r99ja02155#:~:text=CONCLUSION%3A%20Diffusion-weighted%20MR%20imaging%20is%20highly%20accurate%20for,MR%20imaging.%20Article%20History%20Accepted%3A%20Aug%2003%201998
https://pubmed.ncbi.nlm.nih.gov/20463287/
Objectives: To compare the sensitivity and specificity of 1.5-T and 3.0-T diffusion-weighted MRI (DWI) to detect hyperacute ischemic stroke lesions. Methods: We blindly reviewed the DWI of 135 acute stroke patients and 34 controls performed at 1.5 T (n = 108) or 3.0 T (n = 61). The stroke patients all had subsequently proved carotid territory ischemic stroke and were imaged within the first 6 hours after …
https://n.neurology.org/content/74/24/1946
Abstract. Objectives: To compare the sensitivity and specificity of 1.5-T and 3.0-T diffusion-weighted MRI (DWI) to detect hyperacute ischemic stroke lesions. Methods: We blindly reviewed the DWI of 135 acute stroke patients and 34 controls performed at 1.5 T (n = 108) or 3.0 T (n = 61). The stroke patients all had subsequently proved carotid territory ischemic stroke and were imaged …
https://www.researchgate.net/publication/44592881_Diffusion-weighted_MRI_in_acute_stroke_within_the_first_6_hours_15_or_30_Tesla
Request PDF | Diffusion-weighted MRI in acute stroke within the first 6 hours: 1.5 or 3.0 Tesla? | To compare the sensitivity and specificity of 1.5-T and 3.0-T diffusion-weighted MRI (DWI) to ...
https://pubmed.ncbi.nlm.nih.gov/9885601/
Purpose: To evaluate the diagnostic accuracy of diffusion-weighted magnetic resonance (MR) imaging performed within 6 hours of the onset of stroke symptoms. Materials and methods: The authors reviewed the patient records and images from all patients hospitalized in a 10-month period in whom diffusion-weighted imaging was performed within 6 hours of the onset of strokelike symptoms (n = 22).
https://radiopaedia.org/articles/diffusion-weighted-mri-in-acute-stroke-1
Diffusion weighted imaging (DWI) is a commonly performed MRI sequence for evaluation of acute ischemic stroke, and is sensitive in the detection of small and early infarcts. Conventional MRI sequences (T1WI, T2WI) may not demonstrate an infarct for 6 hours, and small infarcts may be hard to appreciate on CT for days, especially without the benefit of prior imaging.
https://www.ahajournals.org/doi/full/10.1161/01.STR.29.9.1783
However, with CT 30% to 60% of the ischemic lesions are still invisible in the acute stage. 1 2 3 4 During the first 24 hours after an ischemic stroke, proton density–weighted (PD-w) and T2-w MRI have 20% to 30% false-negative results. 5 6 7 This percentage increases to 30% to 50% during the first 3 to 6 hours after stroke. 3 8 As a consequence, CT or conventional MRI is not generally used to predict …
https://pubs.rsna.org/doi/abs/10.1148/radiology.210.1.r99ja02155
Diffusion-weighted MR Imaging: Diagnostic Accuracy in Patients Imaged within 6 Hours of Stroke Symptom Onset. Division of Neuroradiology and Stroke Service, Massachusetts General Hospital and Harvard Medical School, GRB 285, Fruit St, Boston, MA 02114-2696.
http://www.ajnr.org/content/21/8/1434
Diffusion-weighted MRI in acute stroke within the first 6 hours: 1.5 or 3.0 Tesla? Safety of tPA in stroke mimics and neuroimaging-negative cerebral ischemia HINTS to Diagnose Stroke in the Acute Vestibular Syndrome: Three-Step Bedside Oculomotor Examination More Sensitive Than Early MRI Diffusion-Weighted Imaging
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5513816/
Only 2 studies reported the proportion of DWI-negative AIS patients who underwent DWI within 6 hours of ictus as compared to after 6 hours. 25, 26 In the first study, the proportions of DWI negativity within and after 6 hours were 5.9% (2 of 34) and 13.7% (16 of 117), respectively. 25 In the second study, the proportions of DWI negativity within and after 6 hours were 14.3% (2 of 14) and 2.2% …
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