PET-CT Full Body



PET-CT examination

PET-CT examination

PET-CT scan

PET-CT scan

PET-CT combines two examination methods – positron emission tomography (PET) and computed tomography (CT) – in a single examination apparatus. With the aid of low-level radiocative test substances (radiotracers) that accumulate in specific organs as a consequence of their specific composition and a subsequently carried out CT, it is possible to obtain simultaneous information about metabolic processes and morphology. The radiation caused due to the decomposition of the radionuclides is registered by the detectors and depicted with a spatial resolution of <10 mm.

Currently, the main application of this method is in the field of tumour diagnostics (oncology). Depending on the issue, various radio-pharmaceuticals are to apply. The radioactively marked sugar molecule F-18-FDG is the substance of choice in the most cases. Depending on the kind of the tumor in question, other substances may be used in specialized diagnostics, such as F-18-choline, Ga-68-PSMA and Ga-DOTATOC.




Preparation at home

It is essential that you have fasted for at least six hours for the examination. This means that after your evening meal on the day before you are not permitted to eat anything else or drink anything containing sugar, which includes sweetmeats such as candies or chewing gum. You must also avoid fructose – only sugar-free drinks such as mineral water are allowed without restriction.

Please bring with you:

  • Existing examination results, where relevant (medical imaging, clinical examinations, operating theatre or discharge reports, lab results)
  • A towel
  • Warm clothing

Contrast agent

Usually, it is necessary to administer a contrast agent in order to obtain important additional information for diagnosis. For this, we require the blood test values creatinine and TSH. Please brings these results with you to your examination.


If you are diabetic, please contact our practice so that we can discuss with you how to plan your preparation and carry out the examination.




Prior to the examination you will be questioned about the medical history of your illness to date and your present symptoms. The doctor will also check whether there is a justifiable indication for the examination, i.e. whether the PET-CT is medically useful and necessary.

For the examination you will lie comfortably – usually on your back – on the examination table. The low-level radiolabelled medication (radiotracer) will be injected into an arm vein. Recording of the examination data can only take place when the medication has been absorbed into the organ or area of the body being examined. During this waiting period you will lie in a darkened room. Here, it is important that you do not move or speak. Please follow instructions precisely, as they are very important for the quality of the images.

The full recording time will be approx. 30 minutes. Usually you will be able to leave our practice immediately after the examination.

A detailed report with the results of the examination will be sent to the doctor who referred you to us. This will usually reach your doctor within a week; in case of medical necessity, it may also come at short notice on the same or the following day.