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    Variations in performance of LCDs are still evident after DICOM gray-scale standard display calibration.

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    Authors
    Lowe, Joanna M
    Brennan, Patrick C
    Evanoff, Michael G
    McEntee, Mark F
    Affiliation
    University College Dublin, Belfield, Ireland. joanna.lowe@ucd.ie <joanna.lowe@ucd.ie>
    Issue Date
    2010-07
    MeSH
    Calibration
    Computer Terminals
    Contrast Sensitivity
    Data Display
    Diagnostic Imaging
    Lighting
    Liquid Crystals
    Luminescence
    Optics and Photonics
    Quality Assurance, Health Care
    Radiographic Image Enhancement
    User-Computer Interface
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    Citation
    Variations in performance of LCDs are still evident after DICOM gray-scale standard display calibration. 2010, 195 (1):181-7 AJR Am J Roentgenol
    Journal
    AJR. American journal of roentgenology
    URI
    http://hdl.handle.net/10147/129594
    DOI
    10.2214/AJR.09.2851
    PubMed ID
    20566814
    Abstract
    Quality assurance in medical imaging is directly beneficial to image quality. Diagnostic images are frequently displayed on secondary-class displays that have minimal or no regular quality assurance programs, and treatment decisions are being made from these display types. The purpose of this study is to identify the impact of calibration on physical and psychophysical performance of liquid crystal displays (LCDs) and the extent of potential variance across various types of LCDs.
    Three display types were evaluated from Hewlett Packard, Viewsonic, and NEC, which totalled 36 LCDs. These displays were calibrated to the DICOM gray scale standard display function using a VeriLum photometer and associated software under the same ambient room conditions. The American Association of Physicists in Medicine Task Group 18 test patterns were used to measure minimum and maximum luminance, contrast ratios, luminance response, veiling glare (physical and psychophysical), psychophysical noise, spatial resolution, and display uniformity.
    Improvements after calibration were noted in all display types for luminance response and psychophysical evaluations of veiling glare. Minimum luminance, contrast ratios, and display uniformity improvements were noted in two separate display types. The only significant reduction in performance was noted for physical evaluations of veiling glare.
    The data presented show that calibration has a significant impact on the brightness and contrast of displays, and other display parameters are influenced by this. The amount of variation in performance that was still evident after calibration is of concern.
    Item Type
    Article
    Language
    en
    ISSN
    1546-3141
    ae974a485f413a2113503eed53cd6c53
    10.2214/AJR.09.2851
    Scopus Count
    Collections
    Radiographers & Radiation Therapists

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