tci Part B Insider - 2015 Issue 6

Get to Know the VQ Scan Specifics

A lung ventilation/perfusion scan, or VQ scan, is a test that helps a pulmonologist measure the airflow (ventilation) and blood flow (perfusion) in the lungs by tracing a small amount of low-risk radioactive substance. The tracer is introduced through inhalation of a radioisotope gas in the ventilation scan, while it is injected into a vein in the patient’s arm in the perfusion scan. Images are obtained using a specialized camera that will detect the distribution of the radioactive energy in the body. A physician will most commonly order a VQ scan to help rule out or confirm pulmonary...

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