Overview
CT perfusion assesses cerebral blood flow and volume to identify salvageable brain tissue. It complements non contrast CT and CT angiography in acute stroke evaluation. Perfusion maps guide reperfusion therapy decisions.
Acquisition and Processing
Rapid acquisition and automated processing produce perfusion maps for clinical use. Standardized thresholds help identify ischemic core and penumbra. Timely imaging is critical for treatment eligibility.
Clinical Impact
Perfusion imaging expands treatment windows for selected patients by identifying viable tissue. It supports decision making for thrombectomy and thrombolysis. Integration with clinical assessment optimizes outcomes.
Limitations
Perfusion results can vary with acquisition parameters and post processing algorithms. Artifacts and patient motion may affect interpretation. Multidisciplinary protocols ensure appropriate use and interpretation.