Your CT Scan A Simple Explanation CT (Computed Tomography) is a technique using X-Rays and a powerful computer to produce cross-sectional images of any part of the body. A CT scans the body in ‘slices’ and the computer process the information from each slice to form a picture of the inner structures. Preparing for your scan Preparation It is very important that in preparation for your CT scan, you do not eat of drink anything for fours hours before your examination. Unless you are told otherwise you may continue take any prescribed medicines. The Scan Prior to your scan, you may be asked to drink or have an injection of ‘contrast agent’. This helps to improve the quality of the CT pictures. For your scan you will be positioned on a comfortable couch, which is moved into the scanner. It is important that during your scan you lie still. You may hear some noise from the scanner while it takes the images – you will feel nothing from the scanner itself. The technician operating the scanner can both see and hear you throughout the procedure so if you have any concerns, you only have to say. Depending on the part to be examined, the scan will take between twenty and forty minutes. Your Results A radiologist will view your results and provide a report to the Doctor who referred you for your examination. You should make an appointment with your Doctor so you can discuss the findings and any action that needs to be taken. Questions The Imaging Centre London is Europe’s premier free-standing imaging facility and places attention to patient care as a high priority. If you are worried, please contact our team before your examination. Alternatively, please visit our Frequently Asked Questions for more information. print this page