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3 March 2009Presentation of similar images for diagnosis of breast masses on mammograms: analysis of the effect on residents
We have been developing a computerized scheme for selecting visually similar images that would be useful to
radiologists in the diagnosis of masses on mammograms. Based on the results of the observer performance study, the
presentation of similar images was useful, especially for less experienced observers. The test cases included 50 benign
and 50 malignant masses. Ten observers, including five breast radiologists and five residents, were asked to provide the
confidence level of the lesions being malignant before and after the presentation of similar images. By use of multireader,
multi-case receiver operating characteristic analysis, the average areas under the curves for the five residents
were 0.880 and 0.896 without and with similar images, respectively (p=0.040). There were four malignant cases in
which the initial ratings were relatively low, but the similar images alerted the residents to increase their confidence
levels of malignancy close to those by the breast radiologists. The presentation of similar images may cause some
observers falsely to increase their suspicion for some benign cases; however, if similar images can alert radiologists to
recognize the signs of malignancy and also help them to decrease their suspicion correctly for some benign cases, they
can be useful in the diagnosis on mammograms.
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Chisako Muramatsu, Robert A. Schmidt, Junji Shiraishi, Qiang Li, Hiroshi Fujita, Kunio Doi, "Presentation of similar images for diagnosis of breast masses on mammograms: analysis of the effect on residents," Proc. SPIE 7260, Medical Imaging 2009: Computer-Aided Diagnosis, 72600R (3 March 2009); https://doi.org/10.1117/12.811447