CT done at 4 hours, with a subsequent followup 24 hours CT
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CT done within 4 hours demonstrates the blurring of grey white matter differentiation at the left insular cortex, with loss of the insular ribbon, obscuration of the lentiform nucleus and abnormally hypodense left basal ganglia showing absence of normal contour ( disappearing basal ganglia sign).
CT repeated at 24 hours, (after thrombolytic therapy ) reveals more prominent hypoattenuating basal ganglia and insular cortex , as the infarct has matured.