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Implementing the DICOM Grayscale Standard Display Function for mixed hard- and soft-copy operations.

Stephen K Thompson1, Charles E Willis, Kerry T Krugh

  • 1Department of Diagnostic Radiology, The University of Texas M.D. Anderson Cancer Center, Houston, USA. sthompson@mdanderson.org

Journal of Digital Imaging
|July 10, 2002
PubMed
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Implementing the DICOM Grayscale Standard Display Function (GSDF) for digital radiography requires significant effort. Achieving consistent image presentation across computed radiography (CR) and direct digital radiography (DR) systems demands custom adjustments and calibration.

Area of Science:

  • Medical Imaging Physics
  • Radiologic Technology
  • Digital Image Processing

Background:

  • The DICOM Grayscale Standard Display Function (GSDF) aims to standardize image presentation in medical imaging.
  • Accurate display of medical images is crucial for diagnosis in computed radiography (CR) and direct digital radiography (DR) systems.
  • Existing implementations of GSDF by vendors may be inconsistent, impacting image quality and diagnostic accuracy.

Purpose of the Study:

  • To implement the DICOM Grayscale Standard Display Function (GSDF) across all image presentation stages for CR and DR.
  • To assess the conformance of hard-copy and soft-copy displays to the GSDF.
  • To identify challenges and necessary steps for successful GSDF integration in clinical settings.

Main Methods:

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  • Measurement and creation of custom look-up tables (LUTs) for printers.
  • Adjustment of Fuji CR gradation processing parameters.
  • Evaluation of display conformance using DICOM Part 14 procedures.

    • Main Results:

    • Successful implementation of GSDF required custom printer LUTs and adjustments to CR gradation processing.
    • CRT luminance response calibration was necessary for quality control.
    • Some picture archiving and communication system (PACS) workstations needed third-party software for calibration.
    • Vendor implementations of GSDF were found to be inconsistent or absent.

    Conclusions:

    • Proper incorporation of the DICOM GSDF into CR and DR systems is a complex process.
    • Significant in-house staff effort is required for calibration, LUT creation, and parameter adjustments.
    • Standardization efforts for GSDF implementation by vendors are needed to ensure consistent medical image presentation.