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Fig. 5 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 5

From: Prognostic factors of delayed cerebral ischemia after subarachnoid hemorrhage including CT perfusion: a prospective cohort study

Fig. 5

A 45-year-old female patient presented with severe headache and neck stiffness of 1-day duration with no motor deficit. On admission non-contrast CT (a) shows right temporal hematoma with surrounding edema and right Sylvian fissure SAH. Volume rendering image (b) of CTA done 1 day after SAH shows a right MCA saccular aneurysm (arrow) having multiple off branches. Moderate vasospasm of the right MCA M1 and M2 segments. Multiple collaterals are evident. Follow-up CT on discharge after 15 days (c) shows reduction of size and density of the hematoma, i.e., clot retraction, with no infarcts. CT perfusion maps (df) done 1 day after SAH revealed mild perfusion deficit on the right side; reduced CBF (d), maintained CBV (e), and prolonged MTT (e). The maintained CBV despite vasospasm is due to collaterals and autoregulation

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