A ventilation-perfusion (V/Q)scan uses an inhaled radiopharmaceutical drug and scintigraphy to create an image of the:

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A ventilation-perfusion (V/Q) scan is a medical imaging test that uses radioactive material to examine how well air and blood are flowing through the lungs. It is used primarily to diagnose pulmonary embolism- a blood clot in the lungs.A V/Q scan images the lungs, not the heart, bones, or thyroid gland.

A Ventilation-Perfusion (V/Q)scan Uses an Inhaled Radiopharmaceutical Drug and Scintigraphy