摘要
介绍了一种用于测量口腔曲面体层X射线机聚焦层位置的方法。通过对投照距离、旋转半径、被照物体放大率的计算对聚焦层位置进行了定性判断,通过重复试验可以实现对精确的聚焦层位置的逐步逼近。为测量聚焦层位置上的口腔曲面体层X射线机图像性能提供了数据支撑。
This article introduces a method used in focal trough measuring of dental panoramic X-ray equipment,qualitative judgment of focal trough position is made through calculation of projection distance,rotation radius and magnification factor.Precise position of focal trough can be approached step by step through repeated trials.It provides data support for measuring the image performance of the oral curved body layer X-ray machine at the position of the focus layer.
作者
张龙达
王云山
郝素丽
柳晶波
ZHANG Long-da;WANG Yun-shan;HAO Su-li;LIU Jing-bo(Liaoning Inspection,Examination&Certification Centre,Liaoning Shenyang 110171)
出处
《中国医疗器械信息》
2021年第5期11-12,92,共3页
China Medical Device Information
关键词
口腔曲面体层X射线机
放大率
聚焦层
测量
dental panoramic X-ray equipment
magnification factor
focal trough
measurement
