影像存档与通讯系统网络结构设计和优化因素

Design and optimizing factors of PACS network architecture

目的 探讨影像存档与通讯系统 (PACS)的网络结构设计及其优化因素。方法 基于上海市第一人民医院的系统对PACS的网络结构以及功能和过程在网络带宽和传输方面的需求进行测试。使用影像工作站内置的影像传输检测功能和WindowsNT的网络监控软件作为测试工具。结果 在静态测试环境下 ,除路由设备之外 ,各类网络构件对带宽和传输率的影响无明显差异 ;在动态环境测试 ,交换机提供的影像传输速率明显高于集线器 ,局部系统通讯速率亦较全局系统通讯高。结论 PACS网络结构设计的优化因素主要是简化网络布局和转换全局通讯任务为数个简单的局部系统通讯 ;优化的要点是确保医学影像诊断过程必需的带宽使用。

Objective Exploring the design and optimizing factors of picture archiving and communication system (PACS) network architecture. Methods Based on the PACS of shanghai first hospital to performed the measurements and tests on the requirements of network bandwidth and transmitting rate for different PACS functions and procedures respectively in static and dynamic network traffic situation, utilizing the network monitoring tools which built in workstations and provided by Windows NT. Results No obvious difference between switch equipment and HUB when measurements and tests implemented in static situation except router which slow down the rate markedly. In dynamic environment Switch is able to provide higher bandwidth utilizing than HUB and local system scope communication achieved faster transmitting rate than global system. Conclusion The primary optimizing factors of PACS network architecture design include concise network topology and disassemble tremendous global traffic to multiple distributed local scope network communication to reduce the traffic of network backbone. The most important issue is guarantee essential bandwidth for diagnosis procedure of medical imaging.