A queueing model of picture archiving and communication system (PACS) with a hierarchy of storage

[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI:10.1109/CBMSYS.1990.109371

A. Nilsson, Hassan Khanmoradi

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引用次数: 1

Abstract

A queueing model is analyzed for systems with a hierarchy of storage where the access time to all the stored images is not the same. A typical PACS consists of a database of medical images, display stations, acquisition systems, and a communication medium. The proposed model is for the delay analysis of the image database, the communication channels, and the picture viewing stations (PVSs). Performance curves are presented for the delay in retrieving images from the database, in the transmission of images, and in processing them in the image processor. The mean delay (that is, the time it takes for a radiologist to view a medical exam from the moment that a request packet is sent to the image database till the time the images are received) is the sum of all the delays mentioned above. The distributions of these delays can be easily evaluated and plotted by using the inverse of the Laplace transforms. From the curves provided, the end-to-end delay for various amounts of load in the system can be accurately estimated.<>

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一种具有存储层次结构的图像存档与通信系统(PACS)的排队模型

本文分析了具有存储层次结构的系统的排队模型，其中对所有存储映像的访问时间不相同。典型的PACS由医学图像数据库、显示站、采集系统和通信介质组成。该模型用于图像数据库、通信信道和图像观测站(pvs)的延迟分析。给出了从数据库中检索图像、传输图像和在图像处理器中处理图像的延迟的性能曲线。平均延迟(即从向图像数据库发送请求包到接收图像为止，放射科医生查看医学检查所花费的时间)是上述所有延迟的总和。这些延迟的分布可以很容易地通过使用拉普拉斯变换的逆来计算和绘制。根据所提供的曲线，可以准确地估计系统中各种负载的端到端延迟

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems

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