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Merits of usability testing for PACS selection.

Wiard Jorritsma1, Fokie Cnossen, Peter M A van Ooijen

  • 1Department of Radiology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands.

International Journal of Medical Informatics
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Summary

A usability test revealed significant differences in Picture Archiving and Communication System (PACS) workstation performance, highlighting that functional requirements alone are insufficient for selecting high-quality PACS. Task-based evaluations are crucial for assessing PACS usability.

Keywords:
Picture Archiving and Communication SystemRadiologySoftware validationUsabilityUser–computer interface

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Area of Science:

  • Medical Imaging Informatics
  • Human-Computer Interaction
  • Radiology Workflow Optimization

Background:

  • Traditional Picture Archiving and Communication System (PACS) selection relies heavily on functional requirements.
  • This approach may not fully capture the practical usability and efficiency of PACS workstations for radiologists.

Purpose of the Study:

  • To compare the usability of different PACS workstations.
  • To assess the added value of usability testing versus traditional functional requirement comparisons.
  • To evaluate the suitability of a task-based methodology for PACS usability evaluation.

Main Methods:

  • A task-based usability test was conducted on four PACS workstations.
  • Radiologists' subjective preferences and task performance were measured.
  • Usability results were compared against the PACS's ability to meet predefined functional requirements.

Main Results:

  • One PACS demonstrated superior usability, outperforming others in both subjective preference and task performance.
  • Significant usability differences existed between PACS with identical functionalities.
  • Subjective preferences did not always align with objective task performance, emphasizing the need for performance metrics.

Conclusions:

  • Functional requirements alone are inadequate for determining overall PACS quality.
  • Usability testing, particularly task-based evaluations, is essential for selecting high-quality PACS.
  • A task-based methodology provides both subjective and objective data, crucial for accurate PACS assessment.