16 May 2002 Fault-tolerant PACS server
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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.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fei Cao, Fei Cao, Brent J. Liu, Brent J. Liu, H. K. Huang, H. K. Huang, Michael Z. Zhou, Michael Z. Zhou, Jianguo Zhang, Jianguo Zhang, X. C. Zhang, X. C. Zhang, Greg T. Mogel, Greg T. Mogel, "Fault-tolerant PACS server", Proc. SPIE 4685, Medical Imaging 2002: PACS and Integrated Medical Information Systems: Design and Evaluation, (16 May 2002); doi: 10.1117/12.467022; https://doi.org/10.1117/12.467022
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