Ischemic stroke CT: Difference between revisions
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==Overview== | ==Overview== | ||
==CT== | ==CT== | ||
CT scan without contrast is the initial test performed to diagnose ischemic stroke and rule out hemorrhagic stroke. In the emergency setting, the sensitivity and specificity of CT scan without contrast is 16% and 96% 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> | CT scan without contrast is the initial test performed to diagnose ischemic stroke and rule out hemorrhagic stroke. In the emergency setting, the sensitivity and specificity of CT scan without contrast is 16% and 96% 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> The sensitivity and specificity for detection of early ischemia is enhanced with perfusion CT scan. | ||
The main advantages of CT scan compared to MRI includes it being rapid, low cost, availability in acute setting, safe in patients with metallic implants such as pacemakers, implantable defibrillators. Some of the disadvantages which may limit its use include its decreased [[sensitivity]] and [[specificity]] to detect [[lacunar]] and posterior fossa infarcts. CT scan with contrast cannot be used in patients with renal failure. | |||
The sensitivity and specificity for detection of early ischemia is enhanced with perfusion CT scan. The main advantages of CT scan compared to MRI includes it being rapid, low cost, availability in acute setting, safe in patients with metallic implants such as pacemakers, implantable defibrillators. Some of the disadvantages which may limit its use include its decreased [[sensitivity]] and [[specificity]] to detect [[lacunar]] and posterior fossa infarcts. CT scan with contrast cannot be used in patients with renal failure. | |||
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Revision as of 17:35, 15 November 2016
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Ischemic Stroke Microchapters |
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Ischemic stroke CT On the Web |
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American Roentgen Ray Society Images of Ischemic stroke CT |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Aysha Anwar, M.B.B.S[2]
Overview
CT
CT scan without contrast is the initial test performed to diagnose ischemic stroke and rule out hemorrhagic stroke. In the emergency setting, the sensitivity and specificity of CT scan without contrast is 16% and 96% respectively [1] The sensitivity and specificity for detection of early ischemia is enhanced with perfusion CT scan. The main advantages of CT scan compared to MRI includes it being rapid, low cost, availability in acute setting, safe in patients with metallic implants such as pacemakers, implantable defibrillators. Some of the disadvantages which may limit its use include its decreased sensitivity and specificity to detect lacunar and posterior fossa infarcts. CT scan with contrast cannot be used in patients with renal failure.
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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)