Fig. 4From: Essential Noninvasive Multimodality Neuromonitoring for the Critically Ill PatientLeft panel: Midbrain as the main landmark to explore the circle of Willis; once that is found, the power Doppler can be started to scan for intracranial arteries. Right panel: Lateral ventricles in a severe TBI patient with pronounced midline shift and trans-tentorial herniationBack to article page