Ventilation Perfusion Scanning

**Semantic type:** Diagnostic Procedure

**Definition:** A nuclear imaging test that uses radiopharmaceuticals to produce an image of the blood flow to the lungs, that measures the ability of the lungs to inhale gas, and that assesses the gas distribution within the lungs.

**Synonyms:** - VENTILATION PERFUSION LUNG SCAN - VQ SCAN - Ventilation-Perfusion Scan