胶囊内窥镜像素数的匹配率和分辨有效性评价法研究  

The study of the methods for evaluating the matching rate of capsule endoscope pixels and its resolution effectiveness

作　　者：贾晓航 张沁园 颜青来 杨仕明[2] 陈德宝 Jia Xiaohang;Zhang Qinyuan;Yan Qinglai;Yang Shiming;Chen Debao(Zhejiang Institute of Medical Device Testing,Hangzhou,Zhejiang 310018,China;Third Military Medical University,Chongqing 400037,China)

机构地区：[1]浙江省医疗器械检验研究院,浙江杭州310018 [2]中国人民解放军第三军医大学,重庆400037

出　　处：《光电工程》2019年第1期21-27,共7页Opto-Electronic Engineering

基　　金：国家重点研发计划(2016YFC0107000)资助项目~~

摘　　要：针对胶囊式内窥镜,建立了全视场光学分辨率与像素数匹配水平的评价,以及像素数分辨有效性的评价方法。该方法通过选择过面阵传感器行或列扫描水平的光轴截面为分析用子午面,以光学分辨角和像素元投射角为分析单元导出线分辨元数、线像素数有效率、视场中心匹配率及全视场最大匹配率,并采用球面视场的分辨距与分辨角简易转换来简化测量方法。这些参数构成了胶囊式内窥镜像素数的匹配率和分辨有效性的评价依据,可为产品设计分析、评价及修改提供参考依据。The evaluation for the matching level between the optical resolution and the pixels number on the full field of view of the capsule endoscope,and the evaluation methods for the resolution effectiveness of pixels number were established.This method selects the horizontal optical axis section as the meridian plane to analyze.The section passing through the planar array sensor is row or column scanned.The line resolution elements number,the line pixel efficiency,the center field matching rate,and the full field maximum matching rate were derived by the analysis unit using the optical resolution angle and the pixel element projection angle.The simple conversion method of resolution length and resolution angle on the spherical field of view can simplify the measurement.These parameters not only constitute the evaluation basis for matching ratio and resolution validity of the pixel number of the capsule endoscope,but also offer a reference for product design,analysis and modification.

关 键 词：胶囊式内窥镜 匹配率 分辨有效性 像素数 

分 类 号：R57[医药卫生—消化系统] O439[医药卫生—内科学]