Figure 5
From: Aneurysmal subarachnoid haemorrhage from a neuroimaging perspective
Multimodal computed tomography. (A) Computed tomography (CT) angiography (coronal plane) shows severe angiographic vasospasm in the left middle cerebral artery (MCA; red arrow). (B) CT perfusion displays increased mean transit time (increased shades of red in the left hemisphere) due to MCA vasospasm. (C) Same patient, CT perfusion repeated after 48 hours of haemodynamic augmentation, which shows resolution of perfusion changes. (D) Noncontrast computed tomography (NCCT) showing the measurement of bicaudate index (A/B) as proposed by van Gijn and colleagues [98]. (E) NCCT shows large volume of intraventricular haemorrhage. The tip of the bilateral external ventriculostomy drains can be seen in the anterior horn of the lateral ventricles (blue arrows). (F) NCCT quality severely compromised by artefacts generated by the metallic colis.