Clinique Générale - Beaulieu

tel. +41 22 839 55 00

Clinique des Grangettes

tel. +41 22 305 03 33

Investigations of the brain

PET/CT of the brain using F18- FDG (Fluoro-DeoxyGlucose)

You must have been fasting for at least 6 hours. Sweet foods are forbidden. We recommend that you drink about 1 litre of water during the 2 hours preceding your appointment.

If you are diabetic please notify the secretariat when making an appointment. You must have been fasting for at least 6 hours. The examination will preferably be organized for late morning.
Eat a normal breakfast early in the morning (7:00 am) and inject yourself with the usual dose of insulin.
Continue taking your oral anti-diabetic medication.

The process
The examination takes place in 2 parts in one session.

1st part
Intravenous injection of the radiopharmaceutical after verification of the blood glucose. The injection is painless, non-toxic and does not cause allergies.
2nd part
Acquisition of the imaging. You must remain motionless during the examination.

During the interval (1 hr) you will rest on a recliner in a cubicle. You must avoid talking or wandering around in the institute.

Main clinical indications

  • Looking for degenerative dementia

The imaging is based on the uptake of a radiopharmaceutical (Fluoro-deoxyglucose) by the neuronal cells of the grey matter. The direct study of the regional metabolism of the brain is a useful complement to the morphological imaging in the clarification of different degenerative dementias such as Alzheimer's disease whose functionally impaired characteristic regions are visualized in the form of a hypoactivity on the PET.

Normal examination