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CT IMAGING OF ACUTE STROKE ARUN JAGANNATHAN VASCULAR AND INTERVENTIONAL RADIOLOGY

C T Imaging Of Acute Stroke

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Page 1: C T Imaging Of Acute Stroke

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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