Abstract
Acceptance and regular constancy tests are necessary to ensure the quality of diagnostic
displays. In November 2014, a new standard (DIN 6868-157) was published which defines
the test procedure and limiting values. There are several substantial changes compared
with the previous standard DIN V 6868-57, i. e. considering the complete image display
system including workstation and application software instead of only the displays.
Since its publication, the new standard has raised many questions. This technical
review aims to show the strengths and weaknesses of the new standard. 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. The daily constancy test
on the other hand, raises several problems and should be replaced by a randomized
test. Additionally, the medical relevance is critically questioned and an overview
of software for the quality assurance will be given.
Key points
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Acceptance and constancy tests for diagnostic displays are defined in DIN 6868-157.
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The new standards has positive and negative aspects.
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Randomized tests should be introduced.
Citation Format
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Entz K, Sommer A, Lenzen H. 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 –. Fortschr Röntgenstr 2018; 190: 51 – 60
Key words
diagnostic displays - DIN 6868-157 - quality assurance - constancy tests - randomized
tests
