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Analysis of Cerebral Vascular System and Blood Flow Prediction System by 4D-CG Visual Simulation

4D-CG视觉模拟分析脑血管系统及血流预测系统

基本信息

批准号：
01490014
负责人：
TAKAMORI Toshi
金额：
$ 2.5万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

项目摘要

The number of cerebral vascular diseases which require surgical operation has recently been increasing. Although the most of these operations need the hemostasis at hemorrhagic regions, it is generally difficult to stop bleeding at a required part, so far. In many cases, a blood supply source to the cerebral vascular system or a part of the vascular (Willis ring, etc.) used to be temporally shut off. But these methods of shutting off sometimes cause ischemia at other parts of brain and fatal risks to patients.It is thought that to minimize the risk on neurosurgical operations it is effective to give medical doctors foresight knowledges with the blood flow estimation system : the system with which doctors could simulate the operations through three dimensional graphics. In this study, the system has been developed.In this study, first, a cerebral vascular system which is organized by 'Willis ring' has been regarded as a kind of fluid circuit. And 'Willis ring' is considered as a system which consists of nine forked pipes.Second, the three dimensional computer graphics (3D-CG) of the cerebral vascular system and the skull bone were made to display the above results in real-time. These 3D-CG are based on the data which are detected from the X-ray films of the cerebral vascular system and from CT films of the skull bone. These graphics are possible on the display to rotate, to transfer, to be divided into some parts, and to observe the inner structure and outer figure of the system from every direction. Each cerebral blood flow rate or blood pressure as the results of above calculation was displayed in a different color for each magnitude, as they could be understood at a glance.

最近，需要外科手术的脑血管疾病的数量一直在增加。虽然这些手术大多需要在出血区止血，但到目前为止，通常很难在所需的部位止血。在许多情况下，供血来源是脑血管系统或部分血管(威利斯环等)。以前是暂时关闭的。但这些阻断方法有时会导致脑其他部位的缺血，并给患者带来致命的风险。人们认为，为了将神经外科手术的风险降至最低，向医生提供血流估计系统的前瞻性知识是有效的。血流估计系统是医生可以通过三维图形模拟手术的系统。在本研究中，首先将由Willis环组成的脑血管系统视为一种流体回路。其次，建立了脑血管系统和颅骨的三维计算机图形(3D-CG)，实时显示上述结果。这些3D-CG是基于从脑血管系统的X射线片和头盖骨的CT片中检测到的数据。这些图形可以在显示器上旋转、转换、分成几个部分，并从各个方向观察系统的内部结构和外部图形。作为上述计算结果的每个脑血流速度或血压对于每个等级以不同的颜色显示，因为它们可以一目了然。