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正常人视网膜的黄斑中心凹无血管区(FAZ)呈不规则的区域形态,最大直径与最小直径相差极大,因此面积测量法较直径测量法更能真实反映其大小。本文采用极坐标读数和图象分析系统的彩色密度分割法等计算机处理技术,在荧光血管造影图上,对45眼的 FAZ进行定量测定。得到 FAZ 的面积分别为0.44mm~2和0.43mm~2,经配对资料和均数比较,证明两者的测量结果在统计学上无显著性差异。极坐标读数计算机处理技术还能测量 FAZ 的周长,其结果为2.63mm,它较之图象分析法,具有简便、易行的优点。对 FAZ 的定量测定有利于在活体了解中心凹区变化的特征,将为探讨血管阻塞病与糖尿病等的病因和发病机理提供动态的、定量的分析方法,并为激光光凝治疗黄斑部疾病提供了局部解剖和组织学上的依据。
Normal human retinal foveal foveal avascular area (FAZ) showed irregular regional morphology, maximum diameter and minimum diameter difference between very large, so the area measurement method is more realistic than the diameter measurement method to reflect the size. In this paper, the polarographic readings and image analysis system of color density segmentation and other computer processing techniques, fluorescence angiography in 45 eyes of the FAZ quantitative determination. The area of FAZ obtained was 0.44mm ~ 2 and 0.43mm ~ 2, respectively. Comparing the data with the average, the results showed that there was no significant difference between the two measurements. Pozac computer processing technology can also measure the perimeter of the FAZ, the result is 2.63mm, which is easier than the image analysis, the advantages of easy. Quantitative determination of FAZ is conducive to understanding the characteristics of the foveal changes in vivo and will provide a dynamic and quantitative analysis method for exploring the etiology and pathogenesis of vascular occlusive disease and diabetes mellitus and provide a method for laser photocoagulation in the treatment of macular diseases The basis of local anatomy and histology.