目前对坐肺的诊断,除粉尘接触史及临床表现外,X线胸部摄片检查仍为主要诊断依据。因此,胶片的质量好坏对诊断亦至关重要。以往用普通片(即60～70千伏)摄影,近年来高千伏胸片(120～150千伏)摄影在国内已逐步展开,但多使用进口胶片,用国产乐 The current diagnosis of pneumoconiosis, in addition to dust exposure history and clinical manifestations, X-ray chest radiography is still the main basis for diagnosis. Therefore, the quality of the film is also crucial for the diagnosis. In the past with ordinary film (ie, 60 to 70 kV) photography, in recent years high kV chest radiography (120 ~ 150 kV) photography in China has gradually started, but the use of imported film, with domestic music