Assessment of the Usefulness of Telemammography for the Second Reading in Screening Mammography

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  • マンモグラフィ検診の二次読影における遠隔画像診断の有用性に関する検討―マンモグラフィ検診遠隔画像診断支援モデル事業に参加して
  • ―マンモグラフィ検診遠隔画像診断支援モデル事業に参加して―

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Abstract

Objective: We assessed the usefulness of telemammography by soft-copy diagnosis.<br>Methods: A wide area network for teleradiology was set up incorporating seven institutions located in two prefectures. A total of 1053 subjects were enrolled. The first reading was performed using hard-copy images at the institution where mammography was undertaken. The second reading using hard-copy images was then performed. These images were transferred to our institution, where a second reading based on soft-copy images was performed. The result of soft-copy diagnosis were then compared with those of the hard-copy diagnosis. The diagnosis concordance rate, which was higher than category 3, was evaluated.<br>Results: Category 1 or 2 accounted for 956 cases at the stage of the second hard-copy diagnosis, of which category 1 or 2 accounted for 930 cases analyzed in the second soft-copy diagnosis. A category higher than 3 accounted for 97 cases at the second hard-copy diagnosis, of which a category higher than 3 accounted for 75 cases at the stage of the second soft-copy diagnosis. The κ-value for the diagnosis concordance rate was 0.751.<br>Conclusion: The diagnostic concordance between hard-copy diagnosis and soft-copy diagnosis was good. Diagnostic accuracy showed no significant difference between the two. We conclude that soft-copy diagnosis by telemammography is useful, and that its application is desirable for screening mammography.

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