PET-CT
Our PET-CT services
With over 20 years of experience in PET‑CT, InHealth offers patients accessible, modern, and efficient scanning options
What is PET-CT?
A PET-CT (Positron Emission Tomography Computed Tomography) combines a CT scan and a PET scan into one single scan.
The scan uses X-ray technology (the CT scan) to show the anatomy of the body together with PET scan which uses a tracer, to show how organs and tissue are functioning.
A small amount of radioisotope tracer is injected into a vein. The tracer is often a form of sugar which is taken up by cells where there is a high level of metabolic activity. This enables doctors to identify disease at an early stage.
Tracers and scans
Different tracers are used depending upon the type of disease. The most commonly used tracer is FDG (flourodeoxyglucose) a form of sugar. Other tracers include PMSA (prostate-specific membrane antigen) which is used when scanning the prostate.
Prior to your scan, you will receive a tracer injection into a vein and then be asked to relax on a comfortable chair for around one hour. During the scan, you will lie on your back on the scanner bed, with arms above your head, for about 20 minutes.
The scan is completely safe and painless, and there are no side effects. Once the scan is complete, you are free to go. A specialised doctor (radiologist) will review the scan and send a report back to your referring doctor.
Frequently asked questions
Here are some other questions we’re often asked about having a PET-CT scan.
Where will I have my scan?
InHealth provide NHS and private PET-CT services at several locations in the UK. You will be invited to attend a PET-CT scanning centre in your area.
Can I self refer for a PET-CT scan?
You can only be referred for a PET-CT scan by a hospital consultant who is managing your care.
What is an FDG PET-CT Scan?
An FDG PET/CT scan is a medical imaging test that combines:
- PET (Positron Emission Tomography): shows how your body is functioning
- CT (Computed Tomography): provides detailed anatomical images
FDG (tracer) is a small amount of radioactive sugar injected into your bloodstream. Areas that use more energy (like some cancers or inflammation) will take up more of the FDG and appear more clearly on the scan.
Why do I need a scan?
Your doctor has referred you for this scan to help diagnose or monitor a medical condition. It can be used for:
- Cancer diagnosis or follow-up
- Checking response to treatment
- Investigating inflammation or infection
Is it safe?
Yes. The scan uses a small, carefully controlled dose of radiation. The amount is similar to other diagnostic scans. If you are pregnant or breastfeeding, please contact us before your appointment.
How do I prepare for a scan?
To ensure the best results:
- Do not eat for 6 hours before your appointment – only plain water is allowed.
- Drink plenty of water beforehand.
- Avoid exercise or physical exertion for 24 hours before the scan.
- Take your usual medications, unless told otherwise.
- Let us know if you have diabetes – please see the section below.
What happens during the scan?
When you arrive, we’ll check your blood sugar and ask you a few questions. You’ll receive an injection of tracer FDG and rest quietly for about 60 minutes to allow the injection to circulate. After this, you’ll then lie on the scanner bed for a 20–30 minute scan. The scanner is open and not claustrophobic. You will need to stay still during the scan.
How long will the appointment take?
Please allow 2 to 3 hours in total. Most of this is spent resting after the injection.
Can I bring someone with me?
You can bring someone to the appointment, but they may not be able to stay with you in the scanning area. Due to the use of a radioactive tracer, please avoid bringing children or pregnant companions.
When will I get the results?
Your scan will be reviewed by a specialist and reported to your referring doctor, usually within a few working days. Your doctor will discuss the results with you directly.
Are there any side effects?
Most people feel completely fine after the scan. The FDG injection does not make you feel drowsy or sick. You can resume normal activities straight after your scan.
Who can I contact if I have any questions?
If you need to reschedule or have questions:
Phone: 0333 015 9971 (Patient Engagement Centre Patient Line)
Email: pec.petct@inhealthgroup.com
Additional information for diabetic patients
If you have diabetes, your preparation will be slightly different to ensure we get clear scan images. Please follow these guidelines:
- Contact the department as soon as you receive your appointment. We may need to adjust your scan time based on your diabetes treatment.
- Do not take any sugary drinks or food before your scan.
- You may need to delay your diabetes medication or insulin on the day of your scan – specific instructions will be given to you by our team.
- Bring your usual medications and glucose monitoring kit with you.
- Let us know immediately if you feel unwell or your blood sugars are very low or very high on the day.
For insulin-dependent patients:
- You may be scheduled for an earlier scan to align with your insulin regime. Please follow any personalised instructions carefully.
- If you are unsure about what to do, contact us prior to your appointment.
