CT scans are also known as CAT scans. They use several X-ray images to create a detailed scan of the body. When you arrive at the department you will have a short safety questionnaire to complete; due to radiation CT scans are not usually recommended in women who are pregnant. Sometimes contrast dye is injected into the vein during the scan to help get more detailed images. The CT scanner itself is a large circular machine, which you lie flat in. You will be asked to stay still and breathe normally. The x-ray parts move inside the big circular ring creating the images. During the scan, you will be able to communicate with the radiographer in the next room through an intercom system. The scan takes around 10 to 20 minutes to do. After the scan, the images are analysed and the results will be given to you at your next clinic appointment.