Vossberg Michal, Tolxdorff Thomas, Krefting Dagmar
Institute of Medical Informatics, Charité Universitätsmedizin Berlin, Berlin 10117, Germany.
IEEE Trans Inf Technol Biomed. 2008 Mar;12(2):145-53. doi: 10.1109/TITB.2007.905862.
Grid computing, the collaboration of distributed resources across institutional borders, is an emerging technology to meet the rising demand on computing power and storage capacity in fields such as high-energy physics, climate modeling, or more recently, life sciences. A secure, reliable, and highly efficient data transport plays an integral role in such grid environments and even more so in medical grids. Unfortunately, many grid middleware distributions, such as the well-known Globus Toolkit, lack the integration of the world-wide medical image communication standard Digital Imaging and Communication in Medicine (DICOM). Currently, the DICOM protocol first needs to be converted to the file transfer protocol (FTP) that is offered by the grid middleware. This effectively reduces most of the advantages and security an integrated network of DICOM devices offers. In this paper, a solution is proposed that adapts the DICOM protocol to the Globus grid security infrastructure and utilizes routers to transparently route traffic to and from DICOM systems. Thus, all legacy DICOM devices can be seamlessly integrated into the grid without modifications. A prototype of the grid routers with the most important DICOM functionality has been developed and successfully tested in the MediGRID test bed, the German grid project for life sciences.
网格计算，即跨机构边界的分布式资源协作，是一种新兴技术，旨在满足高能物理、气候建模或最近的生命科学等领域对计算能力和存储容量不断增长的需求。安全、可靠且高效的数据传输在这样的网格环境中起着不可或缺的作用，在医疗网格中更是如此。不幸的是，许多网格中间件发行版，如著名的Globus Toolkit，缺乏全球医学图像通信标准——医学数字成像和通信（DICOM）的集成。目前，DICOM协议首先需要转换为由网格中间件提供的文件传输协议（FTP）。这有效地降低了DICOM设备集成网络所提供的大部分优势和安全性。本文提出了一种解决方案，使DICOM协议适应Globus网格安全基础设施，并利用路由器透明地路由进出DICOM系统的流量。因此，所有传统DICOM设备无需修改即可无缝集成到网格中。具有最重要DICOM功能的网格路由器原型已经开发出来，并在德国生命科学网格项目MediGRID测试平台上成功进行了测试。
