1 August 1990 Distributed database design and modeling for PACS
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Abstract
The delivery of an operable Picture Archiving and Communication System (PACS) that will meet a hospital's high performance requirements is hampered by severe bottlenecks encountered in the database (DB) and communication systems of a centralized architecture. As an alternative to a centralized design, a distributed DB design that physically allocates and potentially replicates data across a hospital has been modeled and evaluated for PACS at the University of Arizona. Because of geographic dispersion of image generation and "local interest" in image retrieval, a distributed DB design approach has a liatural appeal to PACS. This paper examines the issues of a distributed PACS DB design, describes our modeling approach, and presents the results of a preliminary performance evaluation of two distributed DB designs vs. a centralized design for PACS The results of our simulation experiments show that there is a significant improvement of response time in a distributed architecture due to the effects of "local reference" and "load balancing."
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Olivia R. Liu Sheng, Hong-Mei Chen Garcia, Chih-Ping Wei, Takeshi Ozeki, Patricia McNulty, "Distributed database design and modeling for PACS", Proc. SPIE 1234, Medical Imaging IV: PACS Systems Design and Evaluation, (1 August 1990); doi: 10.1117/12.19012; https://doi.org/10.1117/12.19012
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