Houtekamer G E, Franken L J, Reijns G L, Stut W J
Delft University of Technology, Department of Electrical Engineering, The Netherlands.
J Digit Imaging. 1991 May;4(2):102-11. doi: 10.1007/BF03170418.
A Picture Archive and Communication System (PACS) as it is to be used in a Hospital will consist of a number of workstations, data acquisition stations and output stations, connected to a central storage facility. In this paper the architecture of the central storage facility is studied, and an implementation is proposed. Simulation studies have been performed on the proposed implementations, showing their feasibility. The simulation studies show that the central storage facility can store over 500 sets on a daily basis, while simultaneously handling the review and output activity associated with such a production. On the average, each set is assumed to consist of 3 images of 4 Mbyte each. Simulation results are presented for a number of alternative systems. Special attention is given to the implications of prefetching on the protocols to be used in the PACS system. It is shown that prefetching, in particular in combination with a pipelined system, can yield significant performance benefits. We believe that prefetching of images is a prerequisite for good system performance. The implementation assumes that a high-speed communication protocol is used to interconnect the PACS components. The paper will not go into details on the network considerations. The central storage facility is designed using a general purpose System/370 machine, with the peripherals commonly used for such machines. This implies that it can be realized with currently available equipment. Several alternative implementations using interconnected workstation based systems are suggested.
医院中使用的图像存档与通信系统（PACS）将由多个工作站、数据采集站和输出站组成，这些站点连接到一个中央存储设施。本文研究了中央存储设施的架构，并提出了一种实现方案。对所提出的实现方案进行了仿真研究，结果表明了其可行性。仿真研究表明，中央存储设施每天能够存储超过500套数据，同时处理与此类数据量相关的审查和输出活动。平均而言，每套数据假定由3幅每幅4兆字节的图像组成。给出了多个替代系统的仿真结果。特别关注了预取对PACS系统中所使用协议的影响。结果表明，预取，尤其是与流水线系统相结合时，能够带来显著的性能提升。我们认为图像预取是实现良好系统性能的一个先决条件。该实现方案假定使用高速通信协议来互连PACS组件。本文不会详细讨论网络方面的考虑因素。中央存储设施采用通用的System/370机器进行设计，并配备此类机器常用的外围设备。这意味着它可以用现有的设备来实现。还提出了几种使用基于互连工作站的系统的替代实现方案。
