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- 2009.03.22
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- 2009.03
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목차
Cerebral Infarctions
Cerebral Infarction – CT and MRI
Pre-contrast CT
Hyperacute Infarction (< 6 hrs)
본문내용
Cerebral Infarctions
Hyperacute infarction: < 6 hr
Acute infarction:
Subacute infarction
Chronic infarction
Embolic infarction
Thrombotic infarction
Hemorrhagic infarction (transformation)
폐색된 경우
Cerebral perfusion 감소
일정한 혈관분포 영역, 분수계성 영역(watershed zone)에 이상소견
수일, 내지 2-3주간의 시간경과에 따라 이상소견이 변화
Cerebral Infarction – CT and MRI
Loss of gray-white matter distinction
Parenchymal hypodensity
Intravascular enhancement-slow flow, collateral
Gyral swelling, T2 hyperintensity, hemorrhage
Pre-contrast CT
CT Attenuation
Proportional to tissue water content (1%: 2.5 HU)
Tissue water: 3% within 4 hrs (cytotoxic edema)
Schuir and Hossmann, Cat MCAO study, Stroke 1980;11:593-601
Initial CT detection: within 1 hour after sx onset
von Kummer, Neurology 1997 ;49:S52-S55
참고 자료
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