A Simulation Model Of A Picture Archival And Communication System

Vijay D'Silva; Harry Perros; Chris Stockbridge

doi:10.1117/12.968733

27 June 1988 A Simulation Model Of A Picture Archival And Communication System

Vijay D'Silva, Harry Perros, Chris Stockbridge

Proceedings Volume 0914, Medical Imaging II; (1988) https://doi.org/10.1117/12.968733
Event: Medical Imaging II, 1988, Newport Beach, CA, United States

Abstract

A PACS architecture was simulated to quantify its performance. The model consisted of reading stations, acquisition nodes, communication links, a database management system, and a storage system consisting of magnetic and optical disks. Two levels of storage were simulated, a high-speed magnetic disk system for short term storage, and optical disk jukeboxes for long term storage. The communications link was a single bus via which image data were requested and delivered. Real input data to the simulation model were obtained from surveys of radiology procedures (Bowman Gray School of Medicine). From these the following inputs were calculated: - the size of short term storage necessary - the amount of long term storage required - the frequency of access of each store, and - the distribution of the number of films requested per diagnosis. The performance measures obtained were - the mean retrieval time for an image, - mean queue lengths, and - the utilization of each device. Parametric analysis was done for - the bus speed, - the packet size for the communications link, - the record size on the magnetic disk, - compression ratio, - influx of new images, - DBMS time, and - diagnosis think times. Plots give the optimum values for those values of input speed and device performance which are sufficient to achieve subsecond image retrieval times

Citation Download Citation

Vijay D'Silva, Harry Perros, and Chris Stockbridge "A Simulation Model Of A Picture Archival And Communication System", Proc. SPIE 0914, Medical Imaging II, (27 June 1988); https://doi.org/10.1117/12.968733

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