- During anterior circulation runs this view projects the anterior and middle cerebral arteries above the petrous temporal bone, making them easier to see.
- During posterior circulation runs this view allows visualization of the entire course of the posterior cerebral arteries.
To achieve this view the roof of the orbits should rest at the level of the superior edge, or ridge, of the petrous temporal bones.
To reach this position, the fluoroscope is rotated from the AP position in a cranial direction.