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    • 66. 发明授权
    • Method for the instrumentation of sizes of retinal vessels in the fundus
and apparatus therefor
    • 眼底视网膜血管尺寸检测方法及其设备
    • US5031632A
    • 1991-07-16
    • US391940
    • 1989-08-10
    • Tsuyoshi Watanabe
    • Tsuyoshi Watanabe
    • A61B3/12A61B3/14
    • A61B3/14A61B3/1241
    • The instrumentation of sizes of a retinal vessel in the fundus is carried out by measuring continuously the sizes of the retinal vessel changing in accordance with heart beats at a site preset on the arteriole or the venule of the retinal vessel from images of the retinal vessel in the fundus continuously taken by a television camera or other photographic means; and comparing a periodical change of the sizes of the arteriole or venule of the retinal vessel. Static images are extracted at a given interval from fundus images photographed continuously by a television camera or recorded in a video tape recorder and converted into digital image which, in turn, is subjected to image processing. A length of the processed image data is measured at a given site of the image data fetched at a given timing from a storage, and a graph of rectangular coordinates is formed with a time coordinate versus a coordinate of measured values.
    • 眼底视网膜血管的尺寸仪器通过连续测量视网膜血管的尺寸,根据视网膜血管的预定位置的视网膜血管的小眼或视网膜血管的位置上的心脏搏动而变化的尺寸进行 电视摄像机或其他摄影手段连续拍摄的眼底; 并比较视网膜血管的小动脉或小静脉的大小的周期性变化。 静态图像以给定的时间间隔从由电视摄像机连续拍摄的眼底图像中提取,或者记录在磁带录像机中,并转换成数字图像,数字图像又进行图像处理。 处理后的图像数据的长度在从存储器给定的定时取出的图像数据的给定位置处测量,并且使用时间坐标相对于测量值的坐标形成直角坐标图。