Tikhonov K B, Bairak V G
Rofo. 1982 Jun;136(6):660-5. doi: 10.1055/s-2008-1056125.
In 120 pneumonia patients studied by means of chest radiography, an alteration of density of consolidated areas was detected, depending on the spatial position of the patient during investigation. The pneumonic consolidation shadow grew denser when the radiograph was taken in horizontal position with the damaged lung on the lower side. In contrast to this, the shadow density was markedly diminished when the patient was turned on the opposite (healthy) side. Such quick changing of the radiographic image is explained as a consequence of gravitational influence on the pulmonary circulation. In 20 patients with bronchial carcinoma, changing of the shadow density of the damaged area was very slight. It is believed that this difference may be useful in the identification and diagnosis of these diseases.
在通过胸部X光片研究的120例肺炎患者中，发现实变区域的密度改变取决于检查期间患者的空间位置。当在水平位拍摄X光片且患侧肺在下时，肺炎实变阴影会变浓密。与此相反，当患者转向另一侧（健侧）时，阴影密度明显降低。这种X光影像的快速变化被解释为重力对肺循环影响的结果。在20例支气管癌患者中，受损区域阴影密度的变化非常轻微。据信这种差异可能有助于这些疾病的鉴别和诊断。
