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Related Experiment Videos

A continuous available (CA) server for medical imaging applications.

H K Huang1, Brent J Liu, Z Zhou

  • 1Division of Imaging Informatics, Department of Radiology, The Keck School of Medicine, University of Southern California, Information Sciences Institute, 4676 Admiralty Way, Suite 601, Marina del Ray, CA 90292 USA. hkhuang@aol.com

Academic Radiology
|June 26, 2004
PubMed
Summary

A new continuous available (CA) image server ensures 99.999% uptime for medical imaging databases. This fault-tolerant system offers reliable data access for Picture Archiving and Communication Systems and off-site backups.

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Area of Science:

  • Medical Imaging
  • Computer Science
  • Database Management

Background:

  • Medical imaging research increasingly relies on large-scale data management.
  • Robust image servers are crucial for reliable and timely data delivery.
  • Existing systems may lack the necessary uptime for critical applications.

Purpose of the Study:

  • To describe the design, implementation, and clinical applications of a continuous available (CA) image server.
  • To address the need for a fault-tolerant and highly available image server in medical research and practice.

Main Methods:

  • The CA image server employs triple modular redundancy with a majority voting mechanism.
  • Failover software is integrated to automatically handle hardware failures.
  • System reliability was evaluated under various failure conditions (network, motherboard, disk).

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Main Results:

  • The image server achieved 99.999% hardware uptime, meeting continuous availability standards.
  • Failover performance was automatically monitored and recorded.
  • Experimental results validated the system's fault tolerance in lab and clinical settings.

Conclusions:

  • The CA image server is suitable for Picture Archiving and Communication Systems (PACS).
  • It can be utilized for off-site backups via the Application Service Provider model.
  • The server is portable, scalable, affordable, and requires no manual intervention during failover.