脑血管的影像学技术有多种，在临床中如何优化选择这些技术则取决于对各种技术方法的了解。文章介绍了各种影像学技术的原理、方法、优缺点和其在脑血管疾病诊断的作用，强调了发挥各种影像技 术的最佳效用的意义。-Cerebral blood vessels have a variety of imaging technology, how to optimize the clinical selection of these technologies depends on understanding t

This paper presents an automated blood vessel detection method the fundus image. The method first performs some basic image preprocessing tasks on the gray-scale of the retinal image. The blood vessels are highlighted using by using contrast enhancem