医用诊断X射线数字图像评价模体与轮廓提取研究  

Research on phantom and contour extraction in medical diagnostic X-ray digital image evaluation

作　　者：张从华 杨勇[1,2] 刘操 黄秋[1,2] 万清 杨国涛[1] 冯雪峰 周迎春[4] 张健 刘景鑫 ZHANG Conghua;YANG Yong;LIU Cao;HUANG Qiu;WAN Qing;YANG Guotao;FENG Xuefeng;ZHOU Yingchun;ZHANG Jian;LIU Jingxin(Sichuan Radiation Technology Co.,Ltd.,Chengdu 610021,China;National Institute of Measurement and Testing Technology,Chengdu 610021,China;Xinjiang Measurement and Testing Research Institute,Urumqi 830011,China;Shenzhen Academy of Metrology and Quality Inspection,Shenzhen 518055,China;Changchun City Metrology and Testing Technology Research Institute,Changchun 130012,China;Jilin University China-Japan Friendship Hospital,Changchun 130031,China)

机构地区：[1]四川中测辐射科技有限公司,四川成都610021 [2]中国测试技术研究院,四川成都610021 [3]新疆维吾尔自治区计量测试研究院,新疆乌鲁木齐830011 [4]深圳市计量质量检测研究院,广东深圳518055 [5]长春市计量检定测试技术研究院,吉林长春130012 [6]吉林大学中日联谊医院,吉林长春130031

出　　处：《中国测试》2018年第8期97-101,共5页China Measurement & Test

基　　金：国家重点研发计划课题(2016YFC0103503;2016YFC0103504;2016YFC0103501;2016YFF0103804);国家重大科学仪器设备开发专项(2013YQ090811)

摘　　要：为保障X射线数字成像系统的图像质量,科学地分析评价数字图像的低对比度和细节,对比分析常见医用诊断X射线数字图像评价模体的材料和对比度目标参数。采用阈值和八向链码提取分析目标的轮廓,并将轮廓提取算法设计成计算机图像分析软件,用于分析模体成像实例。分析结果表明图像二值化阈值的选取和目标尺寸大小对轮廓分析具有较大影响,科学地选择阈值,采用统一的计算机程序分析图像低对比度,可以减少人工分析的主观性差异,为科学客观的分析评价数字成像效果提供参考。In order to guarantee the image quality of X-ray digital radiography system,and scientifically analyze and evaluate the low contrast and detail of digital image.The material and parameter of the general imaging phantom are compared and analyzed.Image threshold and eight-neighborhood chain code are applied to the analysis of the target contour extraction algorithm for software program design.A real phantom is analyzed by this program.The analysis results show that the selection of image binarization threshold and the size of target have great influence on contour analysis.Scientifically selecting the threshold and adopting unified computer program to analyze the low contrast of images can reduce the subjectivity of manual analysis and provides reference for scientific and objective analysis and evaluation of digital imaging effect.

关 键 词：DR图像 医用诊断X射线机 模体 低对比度图像 

分 类 号：O59[理学—应用物理] TP391[理学—物理]