IMIXDR自动、手动曝光控制胸片1000例对比研究

Comparative Study of Automatic and Manual Exposal Controlled Radiographs of 1 000 Cases Shot by IMIX DR

目的:探讨如何减少X线曝光量,提高胸片影像质量,减少机器损耗并延长使用寿命。方法:用自动曝光控制方式拍摄胸片(以下简称自控胸片)500例,找出相同体厚胸片的曝光量,用其约1/2的曝光量在手动曝光控制方式下拍摄胸片(以下简称手控胸片)500例,将其进行对比。结果:用≤自动曝光控制方式1/2的曝光量拍摄胸片是可行的。结论:2种控制方式拍摄的胸片影像质量没有明显的差异,手控胸片在提高反差、减少运动性模糊方面优于自控胸片,能部分提高胸片的影像质量;这样可使受检者X线照射量大幅度降低;同时也减少了机器损耗、提高了DR的使用效率。

Objective To discuss a method in order to reduce exposure,improve the X-ray image quality,reduce machine depletion,and extend the service life of the machine.Methods 500 pieces of radiographs were shot using automatic exposure control mode.The exposure of chest films with the same body thick was found out,using 50% of which,500 pieces of radiographs were shot using manual exposure control mode for the comparison.Results The exposure less than or equal to that of the automatic exposure control mode was feasible for the chest film shooting.Conclusion There is no obvious difference in the image quality of chest radiographs shot by the two control modes.Manual exposure control mode in contrast,is better than automatic exposure control mode in increasing the contrast and reducing exercise-induced fuzzy of the radiograph,which can improve the image quality of the chest film.In this way,X-ray irradiation of clients can be reduced greatly,machine depletion can be reduced,and also the use efficiency of DR can be improved.