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  • How is a vq scan performed

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    • V/Q Scan

    What is a V/Q scan?

    A V/Q scan consists of two imaging tests that look for certain lung problems.

    The tests are:

    • A ventilation scan measures how air moves in and out of your lungs
    • A perfusion scan measures circulation (how blood flows in the lungs)

    The two scans may be done separately or together.

    A V/Q scan uses a small amount of a radioactive substance called a tracer.

    The tracer can help your health care provider see how well air and blood flow through your lungs. The scans help diagnose different lung conditions, but they are most often used to check for a pulmonary embolism (PE). A PE is a blood clot in your lungs.

    A PE causes a sudden blockage in a lung artery (a blood vessel that carries oxygen-rich blood from your heart and lungs to your body).

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    This results in your lungs not getting enough air or blood flow.

    A PE usually happens due to deep vein thrombosis (DVT). DVT is a blood clot that forms in a vein deep in your body. Most DVT clots occur in your lower leg or thigh.

    When a DVT blood clot breaks loose and travels through the bloodstream to the l

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