4 doctors weighed in:
What is a ventilation-perfusion scan?
4 doctors weighed in

Dr. Ankush Bansal
Internal Medicine
3 doctors agree
In brief: Radiological test
A ventilation-perfusion (v/q) scan is a specialized radiological lung test comparing mismatches between any part of your lung that still exchanges oxygen (affected in COPD e.
g.) and any part that is not receiving blood flow. This is done through radio-tracers. A mismatch means there is a clot in that part of the lung hindering blood flow. Diseases & surgery of the lung complicate interpretation.

In brief: Radiological test
A ventilation-perfusion (v/q) scan is a specialized radiological lung test comparing mismatches between any part of your lung that still exchanges oxygen (affected in COPD e.
g.) and any part that is not receiving blood flow. This is done through radio-tracers. A mismatch means there is a clot in that part of the lung hindering blood flow. Diseases & surgery of the lung complicate interpretation.
Dr. Ankush Bansal
Dr. Ankush Bansal
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Dr. Thomas Heston
Family Medicine
In brief: Pulmonary embolism
The v/q scan is a nuclear medicine study that is used to evaluate for possible pulmonary embolism or to evaluate resolution of previously known pulmonary embolism. It involves imaging perfusion of the lungs by the blood and imaging ventilation of the lungs by air. A tiny amount of radiation is put into the blood to allow this, and a tiny amount into the air.

In brief: Pulmonary embolism
The v/q scan is a nuclear medicine study that is used to evaluate for possible pulmonary embolism or to evaluate resolution of previously known pulmonary embolism. It involves imaging perfusion of the lungs by the blood and imaging ventilation of the lungs by air. A tiny amount of radiation is put into the blood to allow this, and a tiny amount into the air.
Dr. Thomas Heston
Dr. Thomas Heston
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