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KMID : 0357520080310010055
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Journal of Radiological Science and Technology
2008 Volume.31 No. 1 p.55 ~ p.60
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Assessment of LCD Color Display Performance Based on AAPM TG 18 Protocol : Decision of Quality Control and Calibration Period
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Lee Won-Hong
Son Soon-Yong
Noh Sung-Soon
Lee In-Hwa
Kang Sung-Ho
Lee Yong-Moon
Yoon Surk-Hwan
Son Soon-Yong
Noh Sung-Soon
Lee In-Hwa
Lee Yong-Moon
Park Jae-Soo
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Abstract
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Purpose: This study is to decide a quality control and calibration period of LCD display devices used for reading diagnostic images.
Materials and Methods :: The assessment test of 20 flat panel LCD color display devices used for reading diagnostic images were performed based on AAPM TG 18 protocol over the total six sessions at one month intervals from three months after primary calibration, in terms of geometric distortion, reflection test, luminance response evaluation, luminance uniformity, resolution, noise, veiling glare and chromaticity test.
Results: The results of geometric distortion, reflection test, luminance uniformity, resolution, noise, veiling glare and chromaticity test were within the criteria recommended by AAPM TG 18, except for luminance response evaluation. In the measured luminance deviation of luminance response evaluation, 4(25%) of 20 display devices were passed a criterion from four months after calibration, and 11 (55%) were passed from eight months. Also in the contrast response of the luminance response evaluation, 1(5%) display device was passed a criterion from four months after calibration, and 3(15%) were passed from eight months.
Conclusion: Considering the passing deviation after calibration, the time required and a manpower, the quality control and calibration period of LCD display devices used for reading diagnostic images should be a three months and six months after calibration.
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KEYWORD
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LCD display devices, AAPM TG 18, Quality control period, Calibration period
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