Objective: To explore the effect of different post-processing parameters of digital radiography (DR) on the quality of chest X-ray for pneumoconiosis diagnosis, and to provide suggestions on parameter setting suitable for this kind of DR machine. Methods: From January 1, 2022 to June 30, 2022, the chest films of 35 workers in the department of radiology of Hangzhou occupational disease prevention and treatment hospital were randomly selected and printed after setting different image post-processing parameters. The quality of chest film was evaluated by the measurement of optical densitometer and the combination of subjective and objective by professional physicians. Results: When the density is set to 2 and the contrast/detail contrast is 4.5, the optical density of each area of DR chest film meets the requirements of chest X-ray quality, and the qualified rate of physician quality evaluation is the highest. Conclusion: Reasonable setting of image post-processing parameters can improve the quality of chest radiograph.
目的： 探索数字化X线摄影（DR）技术不同后处理参数设置对于尘肺病诊断胸片的质量影响，提供适合此类DR机拍摄诊断胸片的参数设置建议。 方法： 于2022年1月1日至2022年6月30日随机选择杭州市职业病防治院放射科35名职业健康体检人员作为研究对象，DR胸片设置多组不同图像后处理参数后打印；利用光密度仪测量及专业医师主客观相结合的方式评价其胸片质量。 结果： 密度（Density）设置为2、对比度（Gamma）/细节对比度（Detail Contrast）为4.5时，DR胸片各区域光密度均符合胸片质量要求且医师质量评价结果的合格率最高。 结论： 合理设置图像后处理参数可提高胸片质量。.
Keywords: Diagnosis; Digital radiography; Image post-processing; Image quality; Pneumoconiosis.