def: Lack of blood perfusion in a specific area of the lung. Pulmonary ventilation (V) and Perfusion (Q) scan, also known as lung V/Q scan, is a nuclear test that uses the perfusion scan to delineate the blood flow distribution and the ventilation scan to measure airflow distribution in the lungs.
New term request Lung imaging: pulmonary perfusion defects (elthat_100722020936): Arteriography, CT angiography, or ventilation perfusion scan; hypoperfusion UMLS: 4028621