遮幅观片灯的研制及其在影像识读中的应用

Designing of masked viewbox and its application in imaging reading

目的 :探讨遮幅、亮度可调式高亮度医用观片灯的研制方法 ,及其在影像诊断中的临床应用 .方法 :精心设计了遮幅装置 ,实现观片灯的遮幅功能 ;合理地设计发光系统 ,提高发光源的发光效率 ,以提高观片灯的亮度 ;设计调光装置 ,使其亮度可调 .结果 :遮幅观片灯的亮度提高到 80 0 0lx以上 ,是现有观片灯亮度的 1 0倍 ;对实验铝梯进行观察 ,可见 2 4级 ,提高了识读效果 ;亮度可调 ,可适用于对不同爆光密度的胶片进行阅片诊断 ,消除了识读盲区 ;遮幅功能 ,消除了负效光对影像诊断质量的影响 ,使胶片的局部对比度相对提高 ,便于对病灶部位进行重点观察 .结论 :该观片灯 ,可使胶片上的影像信息得到充分显示 ,为提高诊断质量提供了可靠的保证 ,在QA 。

AIM: To explore the designing of the masked viewbox and its application in imaging reading. METHODS: The masked apparatus was designed in a way that the reading window of the viewbox was adjustable and so was the illuminating system. RESULTS: The illuminance of the masked viewbox was over 8000 lx, 10 times that of the other viewbox. 24 grades on the image of X ray film of aluminum step wedge were visible. CONCLUSION: Our masked viewbox can better show the imaging and it is of great value in QA and QC.