For a CT with contrast, do not eat anything for 6 hours before the scan.
A CT Perfusion is a type of medical test that combines a CT scan with the injection of a special dye to produce pictures of blood vessels and tissues in a part of your body. The dye is injected through an intravenous (IV) line started in your arm or hand.
This scan will tell you the amount of brain tissues that can be saved from damage in stroke patients.
It can help in accesing grading of the tumours.
It can help diagnose recurrent/residual tumour after operation.