Computed Tomography (CT)

What is a CT Scan?

A CT scanner uses a series of x-ray beams and a specialised computer to produce cross sections or slices (images) of organs and structures in the body.  The images when put together can be viewed as a 2D or 3D image.  CT can image different tissues including bones, soft tissues and blood vessels.

Patient Preparation

  • If you have diabetes and take METFORMIN (Glucophage) tablets, please contact our department on 0131 447 2340 as soon as possible before your appointment.
  • Continue to take any other prescribed medication unless you are told otherwise.
  • If you are pregnant or there is any possibility you may be pregnant, please tell the radiographer before your scan.

 Patient Preparation for Abdominal CT Scans

  • In addition to the above, please do not eat anything for 3 hours prior to your appointment.  You may drink clear fluids.

What happens on arrival?

  • Please report to the main reception area where you will be greeted by the administration staff. From there you will be escorted by a member of the imaging team to the imaging department.
  • You will then be taken to the client changing area and changed for your scan if that is appropriate. We provide gowns, tunics and trouser sets, dressing gowns and slippers for your comfort. There is also secure storage available.

What happens during the CT Scan?

  • The radiographer will take you into the CT scanning room and position you on a comfortable table.
  • The examination will be explained to you.  An injection of a contrast agent (special dye) may be required.  This helps to show the organs and the blood vessels better.  A needle will be inserted into a vein in your arm by the radiographer and the injection will take place during the scan.  The injection may give you a general warm feeling, and makes you feel as though you need to pass water.  Do not worry as this is only a sensation and passes over very quickly.
  • NOTE: The contrast agent contains some iodine. In a very small number of cases, this could cause an allergic reaction.  It is therefore essential to inform the radiographer before the scan begins of any allergies, or if you suffer from asthma or hay fever.
  • During the scan the table moves very slowly in and out of the scanner, which is a large ring shape rather like a doughnut.  Nothing touches you but you will hear the scanner working (it makes a whirring noise) and feel the table move.
  • You may be asked to hold your breath for a few seconds at a time
  • The procedure time usually lasts between 5 and 15 minutes

What happens after your CT Scan?

  • You will be taken to the imaging lounge for approximately 20 minutes after your scan just to ensure you have no reaction to the contrast agent.  There are tea and coffee facilities available which you can enjoy in the comfort of the imaging lounge after your scan.
  • After this time when you feel ready you can get dressed and go home
  • The scan is reported by a radiologist.  Your result will be sent to your referrer and they will contact you directly.