Computer assisted image analysis of ICG angiography

采用计算机辅助图像减影的方法，对不同的两幅图像进行减影，可以观察ICG血管造影的脉络膜循环细节，如染料渗漏、病变血管、准确的循环时间等。这一结果被接受，并将发表在欧洲眼科杂志上。然后，我们利用三维软件，用计算机模拟的方法研究了ICG血管造影术的弱荧光。本研究观察ICG血管造影术中封堵物的位置和封堵率。这一结果已于1995年在第二届国际ICG血管造影术研讨会上公布。我们正在研究在实际的人体ICG血管造影术中使用计算机图形软件制作的弱荧光病变。弱荧光病变可以通过减影方法显示，但仅靠人眼的简单观察只能发现少数病变，因此，单纯的人眼观察并不足以诊断ICG血管造影。研究结果将在1996年3月举行的日本眼科学会会议上公布。

We could observe detail choroidal circulation of ICG angiography such as dye leakage, pathological vessels, exact circulation time using computer assisted image subtraction method of different two images. The result is accepted and will be published in European J.Ophthalmology.Then, we studied hypofluorescence of ICG angiography using computer simulation method by three dimensional software. In this study, location of blocking substance and blocking rate in ICG angiography were observed. The result was presented at the 2nd International Symposium of ICG angiography in 1995.We are studying about hypofluorescent lesion which is made using computer graphic software in the actual human ICG angiograph. The hypofluorescent lesions could be demonstrated by subtration method, but by the simple observation of human eye only a few lesions could be detected.As a result, simple observation of human eye is not enough ability to diagnose ICG angiography. The result will be presented at the symposium of the meeting of Japanese Ophthalmology Society in March 1996.