数字化X线摄影图像后处理参数调整在建立尘肺病诊断参考片中的作用

目的 探讨图像后处理参数在数字化X线摄影(digital radiography,DR)胸片用于尘肺病诊断中的作用.方法 随机选择83例某煤矿接尘工人,同时拍摄高仟伏X线胸片和DR胸片.在Philips Essenta DR机上对密度和对比度等图像后处理参数进行设置,研究合适的图像后处理参数.比较高仟伏X线胸片和DR胸片的质量.结果 通过调节图像后处理参数,DR胸片在上中肺野最高密度、膈下和直接曝光区的光密度分别为1.58±0.10、0.23±0.02和2.80±0.21,胸片质量符合尘肺病诊断标准的要求.83例DR胸片的优良片率(79例,95.18％)明显高于高仟伏X线胸片(67例,80.72％),差异有统计学意义(P＜0.01).结论 合适的图像后处理参数可以使DR胸片达到尘肺病诊断的胸片质量要求.

Effects of image post-processing parameters on digital radiography chest radiograph for the diagnosis of pneumoconiosis

Objective To explore the effects of image post-processing parameters on DR chest radiograph for the diagnosis of pneumoconiosis.Methods Eighty three coal miners were examined with high-kV and DR chest radiographs at the same time.Image post-processing parameters(density,contrast and so on)were designed in a Philips Essenta DR machine were designed,then differences of image quality between high-kV and DR chest radiographs were compared.Results After regulating image and proceeding the parameters,the OD (optical density)values of high density areas in the upper-middle lung fields,subphrenic and direct exposure areas were 1.58±0.10,0.23±0.02 and 2.80±0.21,respectively.The quality of chest films met the requirements of diagnostic criteria of pneumoconiosis.The rate of excellent chest films for DR chest radiograph was 95.18％,which was significantly higher than that(80.72％)for high-kV chest radiograph(P＜0.01).Conclusion Appropriate parameters of image post-processing can make DR chest radiograph to meet the requirements of chest radiograph quality for the diagnosis of pneumoconiosis.