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Proceedings Paper

Fault-tolerant PACS server
Author(s): Fei Cao; Brent J. Liu; H. K. Huang; Michael Z. Zhou; Jianguo Zhang; X. C. Zhang; Greg T. Mogel
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Paper Abstract

Failure of a PACS archive server could cripple an entire PACS operation. Last year we demonstrated that it was possible to design a fault-tolerant (FT) server with 99.999% uptime. The FT design was based on a triple modular redundancy with a simple majority vote to automatically detect and mask a faulty module. The purpose of this presentation is to report on its continuous developments in integrating with external mass storage devices, and to delineate laboratory failover experiments. An FT PACS Simulator with generic PACS software has been used in the experiment. To simulate a PACS clinical operation, image examinations are transmitted continuously from the modality simulator to the DICOM gateway and then to the FT PACS server and workstations. The hardware failures in network, FT server module, disk, RAID, and DLT are manually induced to observe the failover recovery of the FT PACS to resume its normal data flow. We then test and evaluate the FT PACS server in its reliability, functionality, and performance.

Paper Details

Date Published: 16 May 2002
PDF: 10 pages
Proc. SPIE 4685, Medical Imaging 2002: PACS and Integrated Medical Information Systems: Design and Evaluation, (16 May 2002); doi: 10.1117/12.467022
Show Author Affiliations
Fei Cao, Children's Hospital Los Angeles/Univ. of Southern California (United States)
Brent J. Liu, St. John's Health Ctr. (United States)
H. K. Huang, Children's Hospital Los Angeles/Univ. of Southern California (United States)
Michael Z. Zhou, Children's Hospital Los Angeles/Univ. of Southern California (United States)
Jianguo Zhang, Shanghai Institute of Technical Physics (China)
X. C. Zhang, Shanghai Institute of Technical Physics (China)
Greg T. Mogel, Children's Hospital Los Angeles/Univ. of Southern California (United States)


Published in SPIE Proceedings Vol. 4685:
Medical Imaging 2002: PACS and Integrated Medical Information Systems: Design and Evaluation
Eliot L. Siegel; H. K. Huang, Editor(s)

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