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    The impact of image test bank construction on radiographic interpretation outcomes: A comparison study.

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    Publication date
    2016-05
    Author
    Hardy, Maryann L.
    Flintham, K.
    Snaith, Beverly
    Lewis, Emily F.
    Keyword
    Image interpretation; Radiographer; Image test banks; Observer performance
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Assessment of image interpretation competency is commonly undertaken through review of a defined image test bank. Content of these image banks has been criticised for the high percentage of abnormal examinations which contrasts with lower reported incidences of abnormal radiographs in clinical practice. As a result, questions have been raised regarding the influence of prevalence bias on the accuracy of interpretive decision making. This article describes a new and novel approach to the design of musculoskeletal image test banks. Three manufactured image banks were compiled following a standard academic menu in keeping with previous studies. Three further image test banks were constructed to reflect local clinical workload within a single NHS Trust. Eighteen radiographers, blinded to the method of test bank composition, were randomly assigned 2 test banks to review (1 manufactured, 1 clinical workload). Comparison of interpretive accuracy was undertaken. Inter-rater agreement was moderate to good for all image banks (manufactured: range k = 0.45–0.68; clinical workload: k = 0.49–0.62). A significant difference in mean radiographer sensitivity was noted between test bank designs (manufactured 87.1%; clinical workload 78.5%; p = 0.040, 95% CI = 0.4–16.8; t = 2.223). Relative parity in radiographer specificity and overall accuracy was observed. This study confirms the findings of previous research that high abnormality prevalence image banks over-estimate the ability of observers to identify abnormalities. Assessment of interpretive competency using an image bank that reflects local clinical practice is a better approach to accurately establish interpretive competency and the learning development needs of individual practitioners.
    URI
    http://hdl.handle.net/10454/7639
    Version
    No full-text available in the repository
    Citation
    Hardy ML, Flintham K, Snaith B et al (2016) The impact of image test bank construction on radiographic interpretation outcomes: A comparison study. Radiography. 22(2): 166-170.
    Link to publisher’s version
    https://doi.org/10.1016/j.radi.2015.10.010
    Type
    Article
    Collections
    Health Studies Publications

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