CT scan

A CT scan uses X-rays and computer processing to create detailed images of the inside of the body. It can help investigate injury or disease when a clinician considers it appropriate. CT involves ionising radiation, so the expected benefit, alternatives and individual circumstances are considered before ordering the scan.

Why might CT be chosen instead of another scan?

Different imaging methods answer different questions. CT can provide useful detail quickly for certain problems, while ultrasound, MRI or no imaging may be more appropriate in others. Ask what the scan is intended to clarify and how the result could change your care.

A request form does not mean every imaging centre offers the same service or funding arrangement. Confirm the appointment, preparation, costs and any eligibility requirements with the provider.

For the Australian guidance behind this explanation, see Healthdirect Australia: CT scan - computed tomography - Healthdirect Australia.

What should I tell the imaging team?

Mention pregnancy or possible pregnancy, previous reactions to contrast, kidney problems and relevant current treatment. Some scans use contrast material to improve detail, while others do not. The team will decide what preparation and precautions are needed.

Follow the specific instructions rather than fasting or stopping medicines on your own. If you have difficulty lying still, pain or anxiety about the procedure, tell the service in advance. Children may need arrangements suited to their age and the clinical question.

How do I get the result?

A radiologist usually interprets the images and sends a report to the referring clinician. Ask when it will be available and arrange a discussion of what it means. A report may need to be interpreted alongside examination and other tests.

See Doccio's imaging service information for suitable clinical discussions. A doctor decides whether imaging is appropriate; a request is not guaranteed. Emergency symptoms should be assessed urgently rather than managed by waiting for an outpatient scan or routine online appointment.

Where to go next

Read imaging to understand the relevant service. A doctor decides whether a consultation, examination, referral or another pathway is appropriate for your situation.