放射性核素肺扫描是肺栓塞的重要诊断方法之一,但其缺点是位于肺组织深部需要多种体位检查,而且即使多种体位,扫描仍常不能正确反映部分阻塞肺段的意义或程度,这是因为肺是大的三维器官,不能用普通二维体位充分观察。放射性核素断层扫描与昔通γ照相机显象比较,前者能对脑、肝、心内病变 Radionuclide lung scan is one of the important diagnostic methods of pulmonary embolism, but its disadvantage is that deep lung tissue requires a variety of postural examination, and even a variety of postures, the scan still can not correctly reflect the meaning or extent of partial obstruction of the lung segment, This is because the lungs are large three-dimensional organs and can not be adequately observed with normal two-dimensional posture. Radionuclide tomography compared with the conventional gamma camera, the former can brain, liver and heart lesions