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Proceedings Paper

Design considerations for wide-area distribution of digital x-ray images
Author(s): L. Rodney Long; Lewis E. Berman; George R. Thoma
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Paper Abstract

The increasing backbone speeds of Wide Area Networks, along with the growing numbers of users of these networks, have created an opportunity for the development of remotely accessible and highly data-intensive digital libraries. The National Library of Medicine is building a prototype system for the storage of several thousand digital x-ray images, while providing remote access to these images across the Internet. This paper discusses the design factors analyzed for this system, and presents performance statistics collected. The design factors considered include: network protocol selection, endpoint tuning of protocol, image compression, and application data handling. Research toward application data handling includes plans to stage groups of images from an optical archive to memory for the efficient transmission of large numbers of images. To maximize image data transmission speed, experimental protocols are being studied as alternatives to TCP/IP. TCP overhead processing is being researched, and approaches to tuning TCP performance for transmission of large image files are being analyzed. To minimize the storage capacity required and to decrease transmission time, lossy compression techniques are being considered. Research is proceeding toward the selection of a compression technique and optimum compression ratio consistent with the image quality required to produce standardized readings.

Paper Details

Date Published: 8 September 1993
PDF: 12 pages
Proc. SPIE 1899, Medical Imaging 1993: PACS Design and Evaluation, (8 September 1993); doi: 10.1117/12.152906
Show Author Affiliations
L. Rodney Long, National Library of Medicine (United States)
Lewis E. Berman, National Library of Medicine (United States)
George R. Thoma, National Library of Medicine (United States)

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

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