Journal of Digital Imaging

, Volume 19, Issue 4, pp 336–345 | Cite as

Development and Evaluation of Different Methods to Assess Download and Display Time of Image Web Systems

  • M. Pietsch
  • A. Schlaefke
  • T. J. Vogl
  • B. BerghEmail author


The aim of this study was to develop and verify different methods of measuring time-to-display (TTD) for radiological images with image web systems (IWS). The process should be automatable in order to repeatedly perform a large number of measurements without human interaction.

Materials and Methods

Three methods were defined and compared with respect to usability, stability, and quality of results. Method 1 was based on Windows 2000 Performance Monitor, whereas method 2 employed phototransistors taped to the screen and connected to a separate PC. A software tool developed for method 3, which used Windows application programming interface (API) function, calls to read the color code assigned to specific pixels on the screen.


Method 3 proved to be the most reliable and easy to automate. The accuracy is practically equivalent to method 2, but it proved to be far more automatable. Method 1 produced the largest mean error, was easily disturbed, but was also easy to set up and provided additional insights into the system’s architecture especially if combined with method 3.


To measure the performance of image distribution systems, any of these methods can be used, but method 3 proved to be superior.

Key Words

Image distribution web-based internet technology WWW (world wide web) PACS (picture archiving and communication systems) image compression performance measurement 


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Copyright information

© SCAR (Society for Computer Applications in Radiology) 2006

Authors and Affiliations

  • M. Pietsch
    • 1
  • A. Schlaefke
    • 2
  • T. J. Vogl
    • 3
  • B. Bergh
    • 1
    Email author
  1. 1.Department of Information Technology and Biomedical EngineeringUniversitätsklinikum HeidelbergHeidelbergGermany
  2. 2.Department of Information and Communication TechnologyKlinikum der Johann Wolfgang Goethe UniversitätFrankfurt am MainGermany
  3. 3.Institute for Diagnostic and Interventional RadiologyKlinikum der Johann Wolfgang Goethe UniversitätFrankfurt am MainGermany

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