Perception in screening mammography: Can insertion of obvious cases enhance detection?

Sarah J. Lewis; Mariusz W. Pietrzyk; Robert C. K. Nurthen; Mark F. McEntee; Michael Evanoff; Warwick Lee; Patrick C. Brennan; Warren M. Reed

doi:10.1117/12.2008103

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28 March 2013 Perception in screening mammography: Can insertion of obvious cases enhance detection?

Sarah J. Lewis, Mariusz W. Pietrzyk, Robert C. K. Nurthen, Mark F. McEntee, Michael Evanoff, Warwick Lee, Patrick C. Brennan, Warren M. Reed

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Proceedings Volume 8673, Medical Imaging 2013: Image Perception, Observer Performance, and Technology Assessment; 867308 (2013) https://doi.org/10.1117/12.2008103
Event: SPIE Medical Imaging, 2013, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

Purpose : To determine whether a strategy of inserting obvious cancers can improve the detection of subsequent abnormal cases in screening mammography sets. Method : Eight experienced breast imaging radiologists (mammographers) were asked to interpret 40 mammography cases in two sittings and localise any malignancies present. Two differing conditions were presented to participants. In Condition 1, there were 36 normal images interspersed with 4 abnormal cases determined to be of medium to high difficulty. Condition 2 differed in that two normal cases were replaced with two obvious malignant cases. These two obvious cases were placed shortly before two subtle malignancies. In both sittings, participants were told they were viewing a screening mammography set. Results: There was no statistical difference in the location sensitivity between the 2 conditions. There was decreased overall specificity in Condition 2 (p = 0.43). Conclusion: Preliminary findings suggest that the insertion of more easily observed abnormal cases into image sets does not improve performance and may in fact result in lower specificity. Further analysis of participants’ eye-positions, and search strategies may offer some explanation of our findings

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Sarah J. Lewis, Mariusz W. Pietrzyk, Robert C. K. Nurthen, Mark F. McEntee, Michael Evanoff, Warwick Lee, Patrick C. Brennan, and Warren M. Reed "Perception in screening mammography: Can insertion of obvious cases enhance detection?", Proc. SPIE 8673, Medical Imaging 2013: Image Perception, Observer Performance, and Technology Assessment, 867308 (28 March 2013); https://doi.org/10.1117/12.2008103

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