Network Memory Server (NMS) and Picture Archiving & Communication System (PACS)

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Middlesex University, School of Engineering and Information Sciences, Computer Communications , İngiltere

Tezin Onay Tarihi: 2012

Tezin Dili: İngilizce

Öğrenci: Enoch Ramoutar

Danışman: Enver Ever

Özet:

Hospitals around the world use Picture Archiving and Communication Systems (PACS) to store medical images. However, as the load on the network increases, which may be due to an increase in the number of patients or users on the network, the image packets start to experience delays in the queue as they are sent from various modalities to the server or take quite some time to arrive at the clinical workstations (clients) when requests are made to the server for images by the Radiologists. The redundant array of independent disks (RAID) technology is popularly used as the main online storage architecture. The disks used in this type of architecture are mechanical in nature, which means that they use rotating magnetic disks and moving heads that are attached to arms. This will contribute to slow access times and latency issues. Even though disks have improved over the past couple of years, with the increase in spindle speeds and reduction in the number of platters, they are still not fast enough to keep up with the speeds of the processor and memory (RAM). Network Memory Servers (NMS) are built on RAM-technology, therefore it will be much faster than disks and hence reduce access times. The purpose of this dissertation is to investigate the possibility of using network memory servers (NMS) as possible solutions for improving the storage and retrieval times of medical images on a picture archiving and communication system (PACS), on Gigabit Ethernet local area network (LAN). The OPNET modeler simulation tool, is effectively employed to derive the performance measures in an attempt to find a more effective configuration.