Lung Ventilation-Perfusion

Scan

What does it involve?


This scan may be in one part or two parts. One part assesses air flow (ventilation) and the other looks at the blood flow (perfusion) of the lungs. The first part will be the perfusion scan which involves injection of the radioactive tracer into a vein via a cannula. If you need to have the second part, another radioactive tracer will be given to you by asking you to breathe it in. You will then be told to lie on a bed and to stay still while a Gamma camera stays close to your body to record images of your lungs.  

What is it used for?


The main use of this scan is to look for a pulmonary embolism (blood clot in the lungs) although other conditions can be investigated.

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