c t imaging of acute stroke
TRANSCRIPT
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CT IMAGING OF ACUTE STROKE
ARUN JAGANNATHANVASCULAR AND INTERVENTIONAL RADIOLOGY
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Hemorrhagic Stroke
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Thromboembolic Stroke
CT PerfusionRapid qualitative/quantitative evaluation of
cerebral perfusionCBF = Cerebral Blood FlowCBV = Cerebral Blood VolumeMTT = Mean Transit Time
CBF = CBV/MTT
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Thromboembolic Stroke
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CT Perfusion (CTP)
Obtained by monitoring first pass of contrast agent bolus through cerebral vasculature
Linear relationship between contrast agent concentration and attenuation (density)
ROI = Region of Interest
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CTP
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CTP
Ischemic ThresholdsCBF 0-10 ml/100 g/minCBV 0-1.5 ml/100 gMTT > 6 seconds
Penumbra Threshold2.5 ml/ 100 g
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Large Infarcted Core
CBF CBV
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Penumbra of Salvageable Tissue
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CTA
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