Mr. Daiki Iwai Profile

Daiki Iwai

at Nagoya Univ School of Medicine

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Proceedings Article | 28 March 2013 Paper

Availability of color calibration for consistent color display in medical images and optimization of reference brightness for clinical use

Daiki Iwai, Haruka Suganami, Minoru Hosoba, Kazuko Ohno, Yutaka Emoto, Yoshito Tabata, Norihisa Matsui

Proceedings Volume 8673, 86731O (2013) https://doi.org/10.1117/12.2007169

KEYWORDS: Calibration, Medical imaging, Medicine, LCDs, Visualization, Color reproduction, Digital imaging, Data communications, Color imaging, Measurement devices

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Color image consistency has not been accomplished yet except the Digital Imaging and Communication in Medicine (DICOM) Supplement 100 for implementing a color reproduction pipeline and device independent color spaces. Thus, most healthcare enterprises could not check monitor degradation routinely. To ensure color consistency in medical color imaging, monitor color calibration should be introduced. Using simple color calibration device . chromaticity of colors including typical color (Red, Green, Blue, Green and White) are measured as device independent profile connection space value called u’v’ before and after calibration. In addition, clinical color images are displayed and visual differences are observed. In color calibration, monitor brightness level has to be set to quite lower value 80 cd/m² according to sRGB standard. As Maximum brightness of most color monitors available currently for medical use have much higher brightness than 80 cd/m², it is not seemed to be appropriate to use 80 cd/m² level for calibration. Therefore, we propose that new brightness standard should be introduced while maintaining the color representation in clinical use. To evaluate effects of brightness to chromaticity experimentally, brightness level is changed in two monitors from 80 to 270cd/m² and chromaticity value are compared with each brightness levels. As a result, there are no significant differences in chromaticity diagram when brightness levels are changed. In conclusion, chromaticity is close to theoretical value after color calibration. Moreover, chromaticity isn’t moved when brightness is changed. The results indicate optimized reference brightness level for clinical use could be set at high brightness in current monitors .

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