肺扫描就是在输入(静脉注入或吸入)能产生γ射线的放射性同位素后,用扫描装置测定肺部的放射活性。这是近年来新发展的诊断方法。肺同位素扫描有观察血流情况的灌注扫描,亲肿瘤扫描及气溶扫描等。以前使用放射性同位素气体如氧~(15)、以同位素氧~(15)标记的二氧化碳、氪~(15)以及较实用的氙~(133)。1962年起又 Lung scanning is the use of a scanning device to measure the radioactivity of the lungs after the input (intravenous injection or inhalation) of radioisotopes that produce gamma rays. This is a newly developed diagnostic method in recent years. Lung isotope scans include perfusion scans to observe blood flow, pro-tumor scans, and air-dissolved scans. In the past, radioisotope gases such as oxygen-15, carbon dioxide labeled with isotope oxygen-15, helium-15, and practical cesium-133 were used. From 1962 onwards