FDG PET scan

Fluorodeoxyglucose positron emission tomography

An FDG PET scan is undertaken to help specialists assess the metabolic activity of certain tumours


A FDG PET (fluorodeoxyglucose positron emission tomography) scan is used to assess the metabolic activity of certain tumours.

It's often used to detect the following:

  • lung cancer
  • brain cancer
  • breast cancer
  • ovarian cancer
  • colorectal cancer
  • lymphomas
  • melanomas and multiple melanomas.

Need to know

  • What happens during the scan? icon plus

    Your FDG PET scan will be carried out by one of our specialist technicians at one of our outpatient centres. After explaining the scan, they'll give you an intravenous injection of a fluorodeoxyglucose, a radioactive tracer.

    You'll then be asked to wait for up to two hours for the tracer to be absorbed fully. After the tracer has set in, you'll be asked to lie flat on your back. Your technician will then use a nuclear medical scanner to take photos of the inside of your body. The radioactive tracer will help to show up your internal organs in detail. The scan will take about an hour.
  • How to prepare icon plus

    You'll be asked to avoid eating anything for six hours before your scan. You may also be asked to limit your drink intake.
  • After the scan icon plus

    You'll be able to go home straight after your FDG PET scan. The results of your scan will be sent to your HCA UK GP or consultant. They'll discuss the results with you and let you know if you require any further tests or treatment.

Our imaging specialists

An FDG scan takes place in our imaging centres, with radiographers to take you through the scan on the day. A specialist radiologist will review the scan and feedback to your referring GP or consultant on the findings.

Our locations

From complex imaging investigations to everyday X-rays, ultrasounds and MRI scans, we provide exceptional diagnostic imaging across our network of hospitals, outpatient centres and specialist clinics.

Book diagnostic tests and scans

Our advisors can help with enquiries about booking a diagnostic scan and can help you book an appointment for a diagnostic test or scan once you have been referred by a GP or consultant.

Call us on

020 7079 4344
This content is intended for general information only and does not replace the need for personal advice from a qualified health professional.
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