CAJ | 학술논문

目的建立数字化X线摄影(DR)最佳图像后处理参数,为将DR技术引入我国尘肺病诊断进行前期研究.方法以204例尘肺患者和31例粉尘作业工人为研究对象,同期拍摄传统屏-片(FSR)胸片和DR胸片.在美国GE公司DR设备工作站改变图像后处理参数打印胶片,由尘肺病专家进行图像层次感、肺纹理、胸椎显影等的评定,选择最佳参数.测定DR片和FSR片光密度(OD)值.结果在本次研究的DR机上,对比度调节和亮度调节是控制DR图像亮度和灰度的重要参数,分别在115％～120％和160％～165％范围,组织对比度调至最大0.15,边缘最低1,降噪和组织均衡均为0的参数设置,可使DR胸片质量最优.DR胸片废片率(0.4％)明显低于FSR胸片(17％),差异有统计学意义(P＜0.05).结论在GE公司DR机上经过适当的图像后处理,DR胸片可达到我国尘肺病诊断标准中对胸片质量的要求.
목적 건립수자화X선섭영(DR)최가도상후처리삼수,위장DR기술인입아국진폐병진단진행전기연구.방법 이204례진폐환자화31례분진작업공인위연구대상,동기박섭전통병-편(FSR)흉편화DR흉편.재미국GE공사DR설비공작참개변도상후처리삼수타인효편,유진폐병전가진행도상층차감、폐문리、흉추현영등적평정,선택최가삼수.측정DR편화FSR편광밀도(OD)치.결과 재본차연구적DR궤상,대비도조절화량도조절시공제DR도상량도화회도적중요삼수,분별재115％～120％화160％～165％범위,조직대비도조지최대0.15,변연최저1,강조화조직균형균위0적삼수설치,가사DR흉편질량최우.DR흉편폐편솔(0.4％)명현저우FSR흉편(17％),차이유통계학의의(P＜0.05).결론 재GE공사DR궤상경과괄당적도상후처리,DR흉편가체도아국진폐병진단표준중대흉편질량적요구.
Objective To establish the optimal image post-processing parameters for digital chest radiography as preliminary research for introducing digital radiography (DR) to pneumoconiosis diagnosis in China.Methods A total of 204 pneumoconiosis patients and 31 dust-exposed workers were enrolled as the subjects in this research.Film-screen radiography (FSR) and DR images were taken for all subjects.DR films were printed after raw images were processed and parameters were altered using DR workstation (GE Healthcare,U.S.A.).Image gradations,lung textures,and the imaging of thoracic vertebra were evaluated by pneumoconiosis experts,and the optimal post-processing parameters were selected.Optical density was measured for both DR films and FSR films.Results For the DR machine used in this research,the contrast adjustment (CA) and brightness adjustment (BA) were the main parameters that determine the brightness and gray levels of images.The optimal ranges for CA and BA were 115％～120％ and 160％～165％,respectively.The quality of DR chest films would be optimized when tissue contrast was adjusted to a maximum of 0.15,edge to a minimum of 1,and both noise reduction and tissue equalization to 0.The failure rate of chest DR (0.4％) was significantly lower than that of chest FSR (17％) (P＜0.05).Conclusion After appropriate image post-processing on DR machine purchased from GE Healthcare,the DR chest films can meet all requirements for the quality of chest X-ray films in the Chinese diagnostic criteria for pneumoconiosis.