Clinical Significance of Hyperdense Lesions on Non-enhanced Brain CT Obtained Immediately after Arterial Revascularization in Acute Ischemic Stroke Patients

Figure 4

CT scan of a 66-year-old woman who experienced a sudden left limb inactivity accompanied by loss of speech function for 4 hours. There was no intracranial hemorrhage on CT scan before thrombolytic therapy. (a). The non-enhanced brain CT scan obtained immediately after intra-arterial thrombolysis showing a type III hyperdense lesion in the right basal ganglia with a CT value of 55-73 Hu. The right ventricle was significantly compressed. The patient had a marked symptom of neurological deterioration. (b). Follow-up CT scan obtained 24 hours after the end of AR revealed that the contour of the hyperdense lesion located in the right basal ganglia region was slightly expanded, the attenuation was increased, and the surrounding low-density edema occurred, with obvious space-occupying effect. (c). T2WI and D FLAIR obtained 24 hours after procedure showed large patchy low signals in the right basal ganglia region surrounded by high signal. Low signal denotes hematoma and high signal denotes edema.

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