What is it?

This test is used to map any potential abnormalities in lung function. We usually conduct this test to evidence a lung embolism (blood clot in a blood vessel in the lung). Sometimes, this test is requested as preparation for lung surgery, to obtain a good image of the healthy parts of the lungs. Ventilation scintigraphy allows for the visualisation of the distribution of the inhaled air in the lungs. Perfusion scintigraphy visualises the blood flow in the lungs. In most cases, a combination of both tests is done.

Test procedure

Pregnancy and breastfeeding



Preparation for the test

No specific preparation is required. Fasting is not required and any medication may be taken as on other days.

Ventilation scan

For a lung ventilation scan, a mixture of air and a slightly radioactive substance is inhaled. You will be asked to take deep breaths in and out through a face mask over a period of five minutes. It is important to breathe in and out through the mouth and not through the nose. Immediately after that, recordings are made for approximately 15-20 minutes.

Perfusion scan

For a lung perfusion scan, a small quantity of radioactive material is administered intravenously. It is good to continue breathing using deep breaths in and out. After that, recordings are made once more for approximately 15-20 minutes. If you are an outpatient, you can resume your normal activities afterward.

Safety and radiation



After a few hours, the product will have disappeared completely from the body. No specific measures need to be taken.



Centres and specialist areas

Nuclear Medicine

Latest publication date: 05/02/2021
Supervising author: Dr Van Den Bossche Bieke