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一种互联网环境下的医学图像自适应传输系统实现

2020-08-03罗哲明杨媛媛

现代电子技术 2020年8期

罗哲明 杨媛媛

摘  要: 为解决医学图像在互联网下传输过程中效率低、存储服务器容量增长过快、耦合性强的问题,文中设计和实现了一种医疗图像自适应传输系统。系统结合P2P传输的设计思路,依据医疗机构接入互联网的防火墙网络地址转化(NAT)类型,使客户端能自动选取传输策略对医学图像进行点对点分片传输。将该系统与传统的有中心传输模式的系统进行速度比较,实验结果表明,采用自适应的传输系统对医学图像进行传输,具有更低的耦合性,且能实现数据的分布式存储,传输效率大幅提高。

关键词: 医学影像传输; 自适应传输系统; P2P; 互联网防火墙; 分布式数据存储; 互联网传输

中图分类号: TN911.73?34; TP391.4             文献标识码: A                      文章编号: 1004?373X(2020)08?0005?03

Implementation of medical image adaptive transmission system in internet environment

LUO Zheming1,2, YANG Yuanyuan2

(1. Medical Imaging Laboratory, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China;

2. University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract: A medical image adaptive transmission system is designed and implemented to solve the problems of low efficiency, excessive growth of storage server capacity and strong coupling in the process of medical images transmission in the Internet environment. In combination with the design idea of P2P transmission, the client?side can automatically select the transmission strategy for point?to?point fragment transmission of medical images according to the network address translation (NAT) type of Internet firewall accessing the medical institutions. The comparison between this system and the traditional system with central transmission mode is  performed for transmission speed. The experiment results show that the medical image transmission system using adaptive mode has lower coupling, can realize the distributed?memory of data, and its transmission efficiency is greatly improved.

Keywords: medical image transmission; adaptive transmission system; P2P; Internet firewall; distributed data storage; internet transmission

0  引  言

随着网络技术的快速发展,互联网环境纷繁复杂,医疗机构考虑到病人隐私和信息安全问题,在内部网络接入因特网过程中,采取了防火墙、IP地址及开放端口限制等措施,导致互联网环境下医学影像的传输大多采用基于数据中心交换方式解决。文献[1]介绍了几种基于客户端/服务器模式的传统医学图像传输:基于DICOM标准的DICOM CSTORE传输,基于FTP协议的FTP传输,基于Web的MTOP/XOP传输。由于传输数据量大,以上基于数据中心的交换方式会导致服务器存储容量增长过快,影像传输的效率较低,系统的稳定性过度依赖于服务器。因此本文提出了一种基于网络源地址和目的地址的网络环境的自适应传输系统,其在特定网络环境下可不依赖于服务器进行中转,弥补了当前采用数据中心交换模式的不足[2?3]。……

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