WE-D-204-04: Color Standard Display Function (CSDF): A Proposed Extension of DICOM GSDF

Authors


Abstract

Purpose:

Use of color images in medical imaging has increased significantly. As of today there is no agreed upon standard on how color information needs to be visualized on medical color displays, resulting into large variability of color appearance and it making consistency and quality assurance a challenge. This paper presents a proposed extension of DICOM GSDF towards color.

Methods:

An extension of the GSDF (Greyscale Standard Display Function) to color is proposed: “CSDF” (color standard display function). CSDF is based on deltaE2000 and offers a perceptually linear color behavior. CSDF uses GSDF as its neutral grey behavior and as such allows for simultaneous presentation of color and greyscale medical images.

Results:

Compared to the presentation given at the 2015 AAPM annual meeting, the algorithm has been improved, QA metrics have been added, and more elaborate validation has been done.Extensive tests were performed on a variety of displays with different characteristics. For each display, color behavior was characterized, the calibration was executed and a QA/compliance test was performed before and after calibration to quantify the effect of the calibration. Results confirm that CSDF significantly improves perceptual color linearity and that the algorithm is stable and reproducible. Furthermore, CSDF calibration was applied to a variety of medical color images. Results indicate that because of the improved perceptual linearity, CSDF can increase perceived contrast of clinically relevant features in a variety of color medical images.

Conclusion:

There is a need for an extension of GSDF towards color visualization in order to guarantee consistency and quality. During the 2014 AAPM annual meeting a first proposal for a CSDF (color standard display function) was made. Now an improved and much more validated version of the proposed CSDF will be presented, as well as QA metrics that can be used for measuring calibration quality.

Tom Kimpe, Johan Rostang, Gert Van Hoey and Albert Xthona are employees of Barco Healthcare

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