What is CT?

Computed Tomography (CT) is a scanning technique that uses several beams of X-rays sent at different angles and collected by a bank of detectors. The x-ray source and detectors rotate around the patient as the table moves slowly through the centre. The information gained from the detectors is sent to a computer system where detailed images of the body are then displayed.

Is it Safe?

Because CT scans are a special type of x-ray, before ordering a scan, doctors are very careful to consider whether the benefits of the scan outweigh the risks. It is important to remember that we are all exposed to natural background radiation throughout our daily lives, and that the scanners we use are able to localise the scan area to only the part of the body that needs to be examined.

CT scans should not be performed on pregnant women, so it is important that you advise us if this is the case.

In very rare cases, if contrast is injected, a person may develop an allergic reaction. You will be monitored for this.

The scanner table has a patient weight limit. Please contact us if you weigh over 200 kg (approx 30 stone).

Will I need to have an injection?

Some patients will require an injection of contrast media that enhances the blood vessels in the area being scanned. This injection contains iodine. During the injection patients may experience a warm flush, a metallic taste in the back of the mouth and in some instances the feeling of passing water. To make sure you are suitable for this injection you will need to answer a few questions asked by the Radiographer.

For certain scans you will also be asked to drink some water or an roal contrast which has an aniseed taste, to help give good definition to your stomach and the rest of your gut.

Your Appointment

When you arrive you will be asked to fill in a few forms relating to your scan, after completing the forms you will be asked to change into a gown and your belongings will be locked away safely. The Radiographer (person who operates the equipment) will take you into the scan room, position you on the table and if necessary the needle for the injection will be put into your arm. During the scan the table moves through a wide hole in the CT scanner which is shaped rather like a polo mint. It will depend on the area of the body that you are going to have scanned, but generally you will only be in the scanning room for about 15 minutes.

When and Where do I get the result?

The Radiologist (specialist doctor) will write a report to your referring doctor detailing the findings from the scan.

The report will be sent to, and available at, your follow up appointment with the doctor who referred you for the CT. The films will either be sent to you at your home address or sent with the report to your consultant.

Please do not ask the Radiographer for a result, as they are unable to give one.

Any other questions?

If you have any other questions, worries or doubts, do not hesitate to ask one of the staff, we want you to feel as comfortable as possible.