CT scan guide

http://www.umediagnostics.com/patient-information/ct-scan-guide/

Download the PDF version of this guide: CT Scan Guide

What is CT?

CT stands for computed tomography. It is an advanced imaging technology which uses many x-rays taken from different angles of a part of the body. These images are combined by a computer to produce cross-sectional pictures of internal organs and 3D images.

The centres’ specialist equipment also allows cardiac CT including calcium scoring, CT fluoroscopy, angiographic CT, virtual colonoscopy and all routine orthopaedic, respiratory, oncology, vascular and neurological examinations.

Is CT safe?

Because CT involves X-rays, radiation exposure is a risk. However, the scanner has been designed to the highest standards of radiation safety and the lowest amount of radiation is always used to obtain the images. The benefits of having the CT scan greatly outweigh the minimal health risks. These benefits include high accuracy and earlier detection of even the smallest abnormalities. Your doctor has chosen this examination for you having fully considered the relative risks and benefits.

CT scans should not be performed on pregnant women, so it is important that you advise us if you are or may be pregnant.

How do I prepare for my scan?

On the day of your appointment you will need to arrive about 15 minutes before your appointment time. Depending on the type of study you will be having, there are certain preparatory requirements. If your CT scan requires preparation, a booking coordinator and a radiographer will speak to you at the time of booking your appointment and give you complete instructions prior to your scan. If at any time you have questions about your preparation, please do not hesitate to call the centre where you will be having the CT.

What can I expect during my scan?

Before your procedure, you will be required to complete a CT safety questionnaire. We will supply you with a gown to wear during the examination and you will be asked to remove any loose metal objects, credit cards and watches and lockers will be available for use.

In the CT suite, the radiographer will position you on the table of the CT scanner and you will be asked to relax and lie as still as possible, the table will slide into a large doughnut-shaped ring (not a tunnel). The radiographer will be able to see, hear and speak to you at all times throughout the procedure via an intercom and viewing window and will give simple directions during the study.

How long will it take?

The scan will usually last between 20 to 30 minutes, depending on the study that is being performed. For more complex scans ie cardiac or colonoscopy it can take up to
45 minutes.

Will I need an injection?

Depending on which part of the body is being studied, a contrast medium containing iodine may be injected to help the blood vessels, organs, and any abnormalities stand out. 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. Whilst allergic reactions to contrast are rare it is essential that you complete your medical history form accurately and to let us know of any medical or non-medical allergies before receiving IV contrast.

Please observe your injection site for signs of infection over the next 24 hours eg redness, soreness, weeping and in the unlikely event of such signs occurring please contact the centre you were seen at immediately for advice or contact your GP.

What happens after my scan?

After the CT you may eat and drink as usual and resume your daily routine immediately after your scan. If you have had an injection it is advisable to drink plenty of fluids to help flush the contrast out of your system.

When will I get the results?

The results of your scan will be sent to your referring doctor/consultant within 24 hours of your exam. Your report and images will include a summary of the radiologist’s findings and recommendations for further follow-up.

Chaperone service

All patients are entitled to have a chaperone present for any consultation, examination or procedure where they feel one is required. This chaperone may be a family member or friend. On occasions it may be necessary for a formal chaperone to be present, ie a trained member of staff. Please let us know prior to your appointment if you require a chaperone.

Any other queries?

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