Stroke Imaging Case: CT Perfusion Reveals Small Core, Large Penumbra in ICA Occlusion

Noncontrast CT, CTA, and CT perfusion in a 66-year-old with dysarthria showed a right frontal infarct with a small core but large penumbra from an ICA occlusion; thrombectomy salvaged the at-risk tissue.

• Educational case from LearnNeuroradiology demonstrating acute stroke imaging workup: noncontrast CT, CTA, and CT perfusion.
• CT perfusion differentiated a small established core from a larger ischemic penumbra, guiding successful endovascular thrombectomy.
• Post-thrombectomy imaging confirmed salvage of the penumbra, illustrating the value of perfusion imaging to identify salvageable brain.

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