尘肺数字化X线摄影胸片质量控制中星卡的应用

Application of star card in edge enhancement processing of pneumoconiosis DR image

目的利用1。星卡图像细节变化，探讨星卡应用在尘肺数字化X线摄影（digital radiography，DR）胸片在胸片质量控制中的可行性。方法用不同类型滤线栅的DR设备进行星卡摄影，确保正交于滤线栅栅条方向星卡图像质量稳定，对符合尘肺DR标准的图像进行边缘增强处理，分析肺组织图像变化与星卡模糊带的变化的关系。采用3名医师盲法阅片的方式，比较使用星卡图辅助判断和直接胸片判断在评估是否使用边缘增强功能的准确率。结果DR胸片在应用边缘增强处理时，星卡模糊带与肺组织图像细节变化保持一致，边缘增强越强化图像细节越锐化模糊带越靠近星卡中心，边缘增强越弱化图像细节越平滑模糊带越远离星卡中心。使用星卡图辅助判断有助于提高判断是否使用边缘增强功能的准确率，差异有统计学意义（P〈0．01）。结论星卡图对判断胸片是否使用了边缘增强功能具有可行性，可用于卫生监督对机构进行质量监督或者放射科自身质控。

Objective The feasibility of applying DR card in the quality control of chest film of pneumoconiosis was discussed by using the image detail change of 1 degree star card. Methods With different types of grid DR device for star card photography, to ensure that the grid bars are orthogonal to the direction of star card image quality is stable, conforms to the DR standard of pneumoconiosis image edge enhancement processing, analysis of the relationship between lung tissue image changes and changes with fuzzy star card. By 3 physicians blind reading way, compare the use of auxiliary judgment and direct x-ray star catu judgment in the accuracy evaluation of whether the use of edge enhancement function. Results Fuzzy images of star card were consistent with lung tissues details as DR images were treated with edge enhancement. The fuzzy zore was closer to the start card center with more image edge enhancement and more image details sharpening . on the opposite, it was farther from the center with less with edge enhancement and less image sharpening. It＇s valuable for star card analysis to evaluate the accuracy of the application of image edge enhancement （P〈 0.001 ）. Conclusion To determine whether the use of X-ray star catu edge feasible enhancements can be used for health supervision and quality supervision and quality control of the institution itself of radiology.