Technical Note: Gray tracking in medical color displays—A report of Task Group 196

Purpose: The authors discuss measurement methods and instrumentation useful for the characterization of the gray tracking performance of medical color monitors for diagnostic applications. The authors define gray tracking as the variability in the chromaticity of the gray levels in a color monitor....

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Veröffentlicht in:Medical Physics Jg. 43; H. 7; S. 4017 - 4022
Hauptverfasser: Badano, Aldo, Wang, Joel, Boynton, Paul, Le Callet, Patrick, Cheng, Wei-Chung, Deroo, Danny, Flynn, Michael J., Matsui, Takashi, Penczek, John, Revie, Craig, Samei, Ehsan, Steven, Peter M., Swiderski, Stan, van Hoey, Gert, Yamaguchi, Matsuhiro, Hasegawa, Mikio, Nagy, Balázs Vince
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States Wiley 01.07.2016
American Association of Physicists in Medicine
Schlagworte:
[INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV]
Algorithms
Biological material, e.g. blood, urine; Haemocytometers
biomedical engineering
biomedical equipment
Biomedical instrumentation and transducers, including micro‐electro‐mechanical systems (MEMS)
Calibrating of instruments or apparatus
calibration
Color
color display
Colorimeters
Colorimetry
colour displays
Computer Science
Computers
Data Display
Diagnostic Imaging
Diagnostic Imaging - economics
Diagnostic Imaging - instrumentation
Diagnostic Imaging - methods
Display devices
grayscale display
grayscale tracking
GSDF
Image Processing
Measuring for diagnostic purposes; Identification of persons
Medical diagnosis
Medical image quality
Medical physicists
patient diagnosis
Quality assurance
Standards and calibration
Testing or calibrating of apparatus or arrangements provided for in groups G01D1/00 to G01D15/00
grayscale display
grayscale tracking
color display
GSDF
ISSN:0094-2405, 2473-4209
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Zusammenfassung:Purpose: The authors discuss measurement methods and instrumentation useful for the characterization of the gray tracking performance of medical color monitors for diagnostic applications. The authors define gray tracking as the variability in the chromaticity of the gray levels in a color monitor. Methods: The authors present data regarding the capability of color measurement instruments with respect to their abilities to measure a target white point corresponding to the CIE Standard Illuminant D65 at different luminance values within the grayscale palette of a medical display. The authors then discuss evidence of significant differences in performance among color measurement instruments currently available for medical physicists to perform calibrations and image quality checks for the consistent representation of color in medical displays. In addition, the authors introduce two metrics for quantifying grayscale chromaticity consistency of gray tracking. Results: The authors’ findings show that there is an order of magnitude difference in the accuracy of field and reference instruments. The gray tracking metrics quantify how close the grayscale chromaticity is to the chromaticity of the full white point (equal amounts of red, green, and blue at maximum level) or to consecutive levels (equal values for red, green, and blue), with a lower value representing an improved grayscale tracking performance. An illustrative example of how to calculate and report the gray tracking performance according to the Task Group definitions is provided. Conclusions: The authors’ proposed methodology for characterizing the grayscale degradation in chromaticity for color monitors that can be used to establish standards and procedures aiding in the quality control testing of color displays and color measurement instrumentation.
Bibliographie:Author to whom correspondence should be addressed. Electronic mail
aldo.badano@fda.hhs.gov
.
ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0094-2405
2473-4209
DOI:10.1118/1.4953186