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Proceedings Paper

Validating a simulation: comparison of a PACS network model of ultrasound image acquisition with actual performance
Author(s): Steven C. Horii; Betty A. Levine; Karen T. Randall; Mary Lou Mallon-Ingeholm; Brian S. Garra; Seong Ki Mun
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Paper Abstract

In expanding our image management and communications system (IMACS) to include a new machine in the Ultrasound Section, we first modeled the impact of attaching the unit to either of our two acquisition modules (AM). Using the software package available to us, we could predict image queue lengths and average image waiting times (before transmission to the central archive). The AMs have attached a variety of devices with differing image production loads. The modeling allowed us to select the AM which would be least impacted (in terms of resoponse time to the devices sending data to the AM) by the added ultrasound machine. We found that though the input response times would not change much with the ultrasound machine connected to either AM, there was a significant impact on the predicted output queue length, with the more heavily loaded AM suffering larger increases in output queue dwell time if the new machine were connected to it. Based on these results, we elected to redistribute the AM loads, and connect the ultmsound machine so as to maintain a relatively balanced load. We tested certain parameters of the model by measuring input and output response times ofan AM under different, artificially induced, acquisition loading. The changes predicted by the model agreed with those measured in order-of magnitude terms.

Paper Details

Date Published: 1 August 1990
PDF: 7 pages
Proc. SPIE 1234, Medical Imaging IV: PACS Systems Design and Evaluation, (1 August 1990); doi: 10.1117/12.19024
Show Author Affiliations
Steven C. Horii, Georgetown Univ. Hospital (United States)
Betty A. Levine, Georgetown Univ. Hospital (United States)
Karen T. Randall, AT&T Medical Diagnostic Systems (United States)
Mary Lou Mallon-Ingeholm, AT&T Medical Diagnostic Systems (United States)
Brian S. Garra, Georgetown Univ. Hospital (United States)
Seong Ki Mun, Georgetown Univ. Hospital (United States)

Published in SPIE Proceedings Vol. 1234:
Medical Imaging IV: PACS Systems Design and Evaluation
Samuel J. Dwyer; R. Gilbert Jost, Editor(s)

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