Development and content validity evaluation of a candidate instrument to assess image quality in digital mammography: A mixed-method study. European journal of radiology Boita, J. n., Bolejko, A. n., Zackrisson, S. n., Wallis, M. G., Ikeda, D. M., Van Ongeval, C. n., van Engen, R. E., Mackenzie, A. n., Tingberg, A. n., Bosmans, H. n., Pijnappel, R. n., Sechopoulos, I. n., Broeders, M. n. 2020; 134: 109464


To develop a candidate instrument to assess image quality in digital mammography, by identifying clinically relevant features in images that are affected by lower image quality.Interviews with fifteen expert breast radiologists from five countries were conducted and analysed by using adapted directed content analysis. During these interviews, 45 mammographic cases, containing 44 lesions (30 cancers, 14 benign findings), and 5 normal cases, were shown with varying image quality. The interviews were performed to identify the structures from breast tissue and lesions relevant for image interpretation, and to investigate how image quality affected the visibility of those structures. The interview findings were used to develop tentative items, which were evaluated in terms of wording, understandability, and ambiguity with expert breast radiologists. The relevance of the tentative items was evaluated using the content validity index (CVI) and modified kappa index (k*).Twelve content areas, representing the content of image quality in digital mammography, emerged from the interviews and were converted into 29 tentative items. Fourteen of these items demonstrated excellent CVI?=?0.78 (k* > 0.74), one showed good CVI?

View details for DOI 10.1016/j.ejrad.2020.109464

View details for PubMedID 33307458