Your guide to CT
Cross sectional images of bones and internal organs. What to expect, how to prepare and what to ask before booking.
Last reviewed 7 Oct 2026 · Information onlyWhat is it?
CT combines X-ray images to build detailed cross sectional pictures. It uses ionising radiation.
What is it used for?
A clinician may consider CT to examine the chest, abdomen, bones or blood vessels. The benefit and radiation exposure should be weighed for each person.
How does it feel and how long does it take?
You lie on a bed that moves through a short ring shaped scanner. The appointment commonly takes 10 to 20 minutes, but preparation may take longer. Contrast can cause a brief warm feeling.
How should I prepare?
You may be asked not to eat for a few hours. Tell the provider about medicines, allergies, kidney problems and diabetes. Follow the instructions for your particular scan.
Who needs extra safety checks?
Tell the team if you are pregnant or could be pregnant. Radiation and contrast require clinical consideration. Previous contrast reactions or kidney disease may affect the scan plan.
A scan is not a substitute for clinical assessment. A normal result does not rule out every condition. Partner clinics include a clinician or GP call before the scan to confirm the right test.
CT availability and booking
Your chosen provider handles the clinical review and booking. Confirm suitability before the scan.
from £360
Clinician or GP call includedPrices from partner clinics, checked Oct 2026. Final price confirmed before you pay.
Explore other scan guides
Different scans answer different questions. Your clinician can help you choose.
Prices from partner clinics, checked Oct 2026. Final price confirmed before you pay.