24 hours
30 minutes
BRAIN
Midline
Fast for 4 hours before the scan (no solid food). You may drink plain water.
A blood test for kidney function (creatinine/eGFR) may be required specially if you are diabetic,kidney disease. Bring the report.
Inform the team of any prior contrast reactions, kidney impairment, thyroid disease, or allergies. • An IV cannula will be placed in your arm. • Drink 2 litres of water over the next 24 hours to flush the contrast dye. • Remove all jewellery from the neck, chest, and upper back.
Remove underwire bras -you will be asked to change into a gown,chest patches. • Breath-hold instructions are critical. The technologist will say;Breathe in and breathe and hold your breath,Practice this before the scan starts.
⚠ Note: If you are on Metformin (or any metformin-containing combination tablet), you must STOP taking it on the day of the scan and for 48 hours after. Resume only after your doctor confirms kidney function is normal.
What is CT Angiography Brain
Targeted CT imaging focusing on the blood vessels (arteries) within the brain and skull. It is used to detect aneurysms, vascular malformations, or arterial narrowing.