Diagnostic service

CT Scan

A CT scan uses X-rays to capture images of a selected body area in cross-sections.

CT imaging equipment used to create cross-sectional medical images.

About this examination

What a CT scan shows

During a CT examination, X-ray readings are taken around the selected area and processed into image slices. The scan protocol depends on the clinical question in the referral.

Instructions depend on the scan

Some CT examinations use contrast material, and preparation can differ between scans. Follow the instructions from your clinician or imaging team for the specific examination.

Before you visit

Tell the clinician or imaging team if you are pregnant or may be pregnant. Contact the centre before your visit to confirm whether the requested CT examination is available and whether it has specific preparation or referral requirements.

Further information

See NHS patient information about CT scans. This page is a general summary, not personal medical advice. Follow your clinician’s advice.

Common questions

Questions about CT Scan.

General answers based on patient guidance. Your clinician or imaging team can confirm what applies to your examination.

CT Scan

What happens during a CT scan?

You lie on a table that moves through the scanner while images are taken. You may be asked to keep still or hold your breath briefly. The radiographer can communicate with you during the scan.

Will I need contrast for my CT scan?

Some CT scans use contrast material, given as a drink or injection, to make certain areas clearer. Whether it is needed and how to prepare depends on the scan. Tell the imaging team about allergies or a previous reaction to contrast.

What should I tell the imaging team before a CT scan?

Tell them if you are pregnant or may be pregnant, take medicines, or have a relevant health condition or allergy. They will confirm any preparation for your specific scan.

Patient information: NHS guide to CT scans

Please note: Preparation and examination details depend on the specific request. Follow the instructions given for your appointment; these answers are not personal medical advice.

Next step

Ask the centre about your visit.

Your appointment request is confirmed only when the centre replies.

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