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Short communication: A method for verified access when using soft copy display.

D S Brettle1, S E Bacon

  • 1Department of Medical Physics & Engineering, Leeds Teaching Hospitals NHS Trust, Leeds General Infirmary, Leeds LS1 3EX, UK.

The British Journal of Radiology
|July 28, 2005
PubMed
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A new verified login system uses a psychophysical check to ensure soft copy display monitors meet optimal settings before image viewing software is launched. This quality control method helps ensure accurate medical image review.

Area of Science:

  • Medical Imaging
  • Display Technology
  • Quality Assurance

Background:

  • Soft copy display systems are evolving, with functionality increasingly defined by software rather than hardware.
  • Routine quality assurance for soft copy monitors is crucial but logistically challenging in hospital settings.
  • Ensuring optimal display performance is essential for accurate medical image review and reporting.

Purpose of the Study:

  • To propose and evaluate a simple psychophysical check for verifying optimal soft copy display performance.
  • To develop a verified login system acting as a portal for launching image viewing software.
  • To implement a minimum level of audit and quality control for soft copy displays.

Main Methods:

  • A challenge/response code system was developed, using letters near the threshold of detection.

Related Experiment Videos

  • The system was tested on three monitor types with five human observers.
  • The psychophysical check was used to control access to image viewing software based on display performance.

    • Main Results:

    • The verified login successfully controlled access for displays performing below optimal settings.
    • The system showed less sensitivity for displays adjusted above optimal settings.
    • The method helps mitigate issues from lower display settings that compress gamma curves and reduce contrast.

    Conclusions:

    • The verified login system provides a valuable tool for ensuring minimum display quality standards in medical imaging.
    • This approach offers a practical method for audit and quality control, addressing potential display deficiencies.
    • The system contributes to reliable soft copy display performance, supporting accurate diagnostic review.