"See: CT head (technique)"
"See: CT cerebral perfusion (technique)"
"See: CT angiography of the cerebral arteries (technique)"
"See: CT head (technique)"
"See: CT cerebral perfusion (technique)"
"See: CT angiography of the cerebral arteries (technique)"
Expected headings
"Purpose"
"Contraindications"
"Non-contrast CT"
"CT perfusion"
"CT angiography"
"A CT stroke protocol is obtained in the emergency setting to rapidly diagnose and quantify patients presenting with probable ischaemic strokes and to enable appropriate urgent management (e.g. endovascular clot retrieval or intravenous thrombolysis)."
"There is an increasing trend to perform multi-pass CTA of the brain to perform multiphase CT angiography collateral score in acute stroke."
"A non-contrast CT of the brain, usually obtained volumetrically and reformatted in three planes (sagittal, axial and coronal), is obtained first. In addition to a rapid overview of the brain (see an approach to CT head) that may demonstrate unexpected non-stroke findings (e.g. tumours) it specifically allows for the following stroke-related features to be sought:"
"some centres will perform the CT angiogram before the perfusion study in order to give the interventional team additional minutes to inspect and plan for a potential clot retrieval as the perfusion study is being performed; this requires advanced trained radiographers, customised pressure injection protocols, and custom CT protocols"