Ischemic stroke MRI: Difference between revisions
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==Overview== | ==Overview== | ||
==MRI== | ==MRI== | ||
MR diffusion weighted imaging is the most sensitive and specific test for diagnosing ischemic stroke and may help detect presence of infarction in few minutes of onset of symptoms. It may also help differentiate viable tissue from infarct area if combined with MR perfusion. For diagnosing ischemic stroke in the emergency setting, MRI scan has the sensitivity and specificity of 83% and 98% respectively.<ref name="pmid17258669">{{cite journal | last=Chalela | first=J | coauthors=Kidwell C, Nentwich L et al. | title=Magnetic resonance imaging and computed tomography in emergency assessment of patients with suspected acute stroke: a prospective comparison | journal=Lancet | volume=369 | issue=9558 | pages=293-8 | year=2007 | url=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=17258669 | pmid=17258669 | accessdate=2008-01-22 }}</ref> | MR diffusion weighted imaging is the most sensitive and specific test for diagnosing ischemic stroke and may help detect presence of infarction in few minutes of onset of symptoms. It may also help differentiate viable tissue from infarct area if combined with [[MR perfusion]]. For diagnosing ischemic stroke in the emergency setting, MRI scan has the [[sensitivity]] and [[specificity]] of 83% and 98% respectively.<ref name="pmid17258669">{{cite journal | last=Chalela | first=J | coauthors=Kidwell C, Nentwich L et al. | title=Magnetic resonance imaging and computed tomography in emergency assessment of patients with suspected acute stroke: a prospective comparison | journal=Lancet | volume=369 | issue=9558 | pages=293-8 | year=2007 | url=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=17258669 | pmid=17258669 | accessdate=2008-01-22 }}</ref> MRI scan is superior to CT scan for being more sensitive and specific in detection of [[Lacunar infarcts|lacunar]] and posterior fossa infarcts, differentiation between acute and chronic stroke, detection of microbleeds and lack of [[Ionizing radiation|ionising radiation]]. Some of the disadvantages of [[MRI scan]] may include lack of availability in acute setting, higher cost, inability to use it in patients with metallic implants. MRI with contrast cannot be used in patients with [[renal failure]]. | ||
MRI scan is superior to CT scan for being more sensitive and specific in detection of lacunar and posterior fossa infarcts, differentiation between acute and chronic stroke, detection of microbleeds and lack of ionising radiation. Some of the disadvantages of MRI scan may include lack of availability in acute setting, higher cost, inability to use it in patients with metallic implants. MRI with contrast cannot be used in patients with renal failure. | |||
Patient No 1: Change in Mental Status | |||
([http://www.radswiki.net Images courtesy of RadsWiki]) | ([http://www.radswiki.net Images courtesy of RadsWiki]) | ||
Revision as of 17:34, 15 November 2016
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Ischemic Stroke Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Ischemic stroke MRI On the Web |
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American Roentgen Ray Society Images of Ischemic stroke MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Aysha Anwar, M.B.B.S[2]
Overview
MRI
MR diffusion weighted imaging is the most sensitive and specific test for diagnosing ischemic stroke and may help detect presence of infarction in few minutes of onset of symptoms. It may also help differentiate viable tissue from infarct area if combined with MR perfusion. For diagnosing ischemic stroke in the emergency setting, MRI scan has the sensitivity and specificity of 83% and 98% respectively.[1] MRI scan is superior to CT scan for being more sensitive and specific in detection of lacunar and posterior fossa infarcts, differentiation between acute and chronic stroke, detection of microbleeds and lack of ionising radiation. Some of the disadvantages of MRI scan may include lack of availability in acute setting, higher cost, inability to use it in patients with metallic implants. MRI with contrast cannot be used in patients with renal failure.
Patient No 1: Change in Mental Status
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MRI - DWI
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MRI - FLAIR
Patient No 2: Left ACA Infarction
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MRI - T2
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MRI - T1
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MRI - ADC
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MRI- DWI
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MRI- DWI
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MRI- DWI
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MRI- DWI
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MRI- FLAIR
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MRI- FLAIR
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MRI- ADC
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MRI- A
References
- ↑ Chalela, J (2007). "Magnetic resonance imaging and computed tomography in emergency assessment of patients with suspected acute stroke: a prospective comparison". Lancet. 369 (9558): 293–8. PMID 17258669. Retrieved 2008-01-22. Unknown parameter
|coauthors=ignored (help)