Fig 4.

Sagittal view of noncontrast CT scan of the brain with a diagram of the course of posterior cerebral artery superimposed on it. A, basilar artery; B, internal carotid artery; C, posterior cerebral artery; D, medial posterior choroidal artery; E, lateral posterior choroidal artery; F, splenial artery; G, posterior temporal artery; H, posterior temporal artery; I, occipital artery; P1, precommunicating segment of the posterior cerebral artery; P2, post-communicating segment of the posterior cerebral artery; P3, quadrigeminal segment of the posterior cerebral artery; P4, cortical segment of the posterior cerebral artery.