Why Have a CT scan?

There may be many reasons why your doctor refers you for a CT scan including;

• To diagnose kidney or gall stones
• To diagnose a slipped or bulging vertebral disc
• To assess lesions and cysts
• To diagnose cancer
• ...and many more

Who performs the examination?

CT images are taken by specialist staff called radiographers. These images are then interpreted and reported upon by specialist doctors called Radiologists.

What happens during the examination?

For the examination, your radiographer may ask you to remove any clothing that might obstruct the accuracy of your images and wear a provided gown where necessary. You will then be asked to lie on the CT table which slides through the circular CT machine. Whilst this happens you will be asked to keep very still and hold your breath for a few seconds. Whilst you are doing this, the CT machine will be taking images.

Once the radiographer is satisfied that the images are accurate the procedure is finished. Capturing the images takes only a few seconds whilst the processing of the films may take several minutes. There is no pain or discomfort caused by the CT scan and you will have your films within an hour from walking into the building in most cases.

Remember to take your film to your next doctor's appointment.

What are the Risks of having too many CT scans?

As CT's are a type of x-ray, you should be careful not to have too many as excessive exposure caused by too many CT scans in a short time can be harmful to the body.

To avoid over exposure to CT scan radiation, radiographers who work in x-rays and CT scans are required to stand behind a protective glass shield when your pictures are being taken.

Do I need to do any preparation before I have a CT scan?

Most CT scans require preparation in order to ensure that the images are accurate. These will typically involve fasting and sometimes you will be asked to drink a contrast drink prior to your appointment.

See Preparations for more information.

What is contrast and why is it required?

Contrast usually comes in the form of a drink or an intravenous injection depending on the part of the body that is being observed. It is a benign liquid that shows up in the scan. Oral contrast will be used to line the bowel and digestive tract showing any irregularities in the surfaces. Intravenous contrast can be used to show if a lesion is vascular. Scans are performed both before and after the contrast is given. Comparisons between the two scans show if there is any contrast within the lesion compared to before. If there is- the lesion is considered to be vascular and may require further investigation. If the lesion is not vascular then it will normally be considered benign.

Are there risks associated with with contrast?

Contrast is usually an iodine or barium based liquid. As such there is always a small chance that it may cause an allergic reaction. Before you are given the contrast you will be asked if you are allergic to iodine, shellfish or seafood. This is because shellfish and seafood has traces of iodine in them naturally and an allergy to them may indicate an allergy to iodine. In such cases, alternative contrasts can be considered.

Where can I get a CT examination and how much does it cost?

CT examinations are available at four of our X-RAY & IMAGING practices; Caloundra, Kawana, Noosa and Cooroy. These exams are bulk billed ($0) to all patients with a valid referral and a current Medicare, DVA or Workcover card.

Do I have to make an appointment for a CT scan?

Yes. Although there is usually little or no waiting times for a CT scan, appointments are essential as there is often some preperation required.