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Proceedings Paper

Cost-effective data storage/archival subsystem for functional PACS
Author(s): Y. P. Chen; Yongmin Kim
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Paper Abstract

Not the least of the requirements of a workable PACS is the ability to store and archive vast amounts of information. A medium-size hospital will generate between 1 and 2 TBytes of data annually on a fully functional PACS. A high-speed image transmission network coupled with a comparably high-speed central data storage unit can make local memory and magnetic disks in the PACS workstations less critical and, in an extreme case, unnecessary. Under these circumstances, the capacity and performance of the central data storage subsystem and database is critical in determining the response time at the workstations, thus significantly affecting clinical acceptability. The central data storage subsystem not only needs to provide sufficient capacity to store about ten days worth of images (five days worth of new studies, and on the average, about one comparison study for each new study), but also supplies images to the requesting workstation in a timely fashion. The database must provide fast retrieval responses upon users' requests for images. This paper analyzes both advantages and disadvantages of multiple parallel transfer disks versus RAID disks for short-term central data storage subsystem, as well as optical disk jukebox versus digital recorder tape subsystem for long-term archive. Furthermore, an example high-performance cost-effective storage subsystem which integrates both the RAID disks and high-speed digital tape subsystem as a cost-effective PACS data storage/archival unit are presented.

Paper Details

Date Published: 8 September 1993
PDF: 12 pages
Proc. SPIE 1899, Medical Imaging 1993: PACS Design and Evaluation, (8 September 1993); doi: 10.1117/12.152876
Show Author Affiliations
Y. P. Chen, Aptec Computer Systems, Inc. (United States)
Yongmin Kim, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 1899:
Medical Imaging 1993: PACS Design and Evaluation
R. Gilbert Jost, Editor(s)

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