![]() ![]() Here, the highest quality criteria are required which are rarely met by standard PC components (monitor, display controller, etc.). ![]() This dependence, however, is critical with respect to lesions in the low-contrast range. This dependence is only minor for clearly recognizable lesions with high contrast, as they can hardly be overlooked even under unfavorable conditions. The findings of digital X-ray images are to a considerable extent dependent on the quality of the monitors and the ambient conditions in the reading room. DIN 6868-157: Image Quality Assurance in Diagnostic X-ray Departments – X-ray Ordinance Acceptance and Constancy Test of Image Display Systems in their Environment – Technical Review –. The new standards has positive and negative aspects.Įntz K, Sommer A, Lenzen H. Additionally, the medical relevance is critically questioned and an overview of software for the quality assurance will be given.Īcceptance and constancy tests for diagnostic displays are defined in DIN 6868-157. The daily constancy test on the other hand, raises several problems and should be replaced by a randomized test. Positive aspects are the introduction of a limiting value for the illuminance and the extension of the interval for constancy tests from 3 to 6 six months. This technical review aims to show the strengths and weaknesses of the new standard. Since its publication, the new standard has raised many questions. considering the complete image display system including workstation and application software instead of only the displays. There are several substantial changes compared with the previous standard DIN V 6868-57, i. e. ![]() In November 2014, a new standard (DIN 6868-157) was published which defines the test procedure and limiting values. Limiting Values and Tolerances for the Constancy TestĪcceptance and regular constancy tests are necessary to ensure the quality of diagnostic displays.Homogeneity, Color Impression and Uniformity, Defective Pixels.Essential Changes to the previous Testing Procedures. ![]()
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December 2022
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