A VQ scan is a two-part test that providers most commonly use to diagnose a blood clot in your lungs (pulmonary embolism). It measures the airflow (ventilation) and blood flow (perfusion) in your lungs.

Feb 26, 2018 · A pulmonary ventilation/perfusion (or VQ) scan is a series of two lung scans. The scans are either performed together or one after the other, but are often referred to as one procedure.

The ventilation part of the test looks at the ability of air to reach all parts of the lungs, while the perfusion part evaluates how well blood circulates within the lungs. In physiology, perfusion is …

Aug 19, 2024 · A pulmonary ventilation/perfusion scan involves two nuclear scan tests to measure breathing (ventilation) and circulation (perfusion) in all areas of the lungs.

Jun 15, 2025 · How Does a VQ Scan Work? The VQ scan is a nuclear scan. It measures airflow, called ventilation, and blood flow, called perfusion, in your lungs. The V and Q make up a math equation …

Apr 25, 2025 · This information explains what a ventilation-perfusion scan is. A ventilation-perfusion scan is also called a VQ scan. This resource also explains how to get ready for your VQ scan and …

A ventilation-perfusion (VQ) scan is a diagnostic test using radioisotopes to evaluate lung perfusion and ventilation. Ventilation-perfusion scan consists of two portions, a ventilation (V) scintigraphy …