Hyperdense artery sign on computed tomography in acute ischemic stroke

Figure 1 Non-enhanced cranial computed tomography of a 58-year-old female patient with a hematocrit of 58%. Note that all depicted intracranial arteries and veins appear hyperdense (curved arrows). No contrast agent was applied prior to the scan.

Figure 2 Pseudohyperdense right middle cerebral artery (arrows) due to underlying infection of the temporal lobe.

Figure 3 Hyperdense left middle cerebral artery sign (arrow) in a patient presenting with signs of left hemispheric stroke.

Figure 4 Hyperdense left anterior cerebral artery (arrow) in a patient who presented with right-sided hemiparesis.

Figure 5 Hyperdense right fetal posterior cerebral artery (arrow) in a patient who presented with left sided homonymous hemianopia and left sided hemiparesis.

Figure 6 Hyperdense basilar artery (arrow) in a patient who was found unconscious.