Operating instructions

Perfusion CT

• The standard examination slice is best positioned

such that it cuts through the basal ganglia at the level

of the inner capsule. This selection includes those

vascular territories of the brain that are frequently

affected by perfusion impairment associated with

acute stroke in the carotid territory.

• The slice should be selected “flatter“ than in normal

head CT scan, the angulation should be adjusted per-

pendicular to the occipital segment of the superior

sagittal sinus well above the confluence of sinuses.

• The eye lens should never be positioned in the scan

plane.

Example of a

standard slice

through the basal

ganglia in a

lateral topogram.