Distributed database design and modeling for PACS
Olivia R. Liu Sheng, Hong-Mei C. Garcia, Chih‐Ping Wei, Takeshi Ozeki, PATRICIA K. McNULTY · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1990
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.© (1990) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.