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Abstract #2335

Approach for building a DWI dedicated lexicon for breast cancer

Aika Okazawa1, Mami Iima1,2, Ryosuke Okumura1, Masako Kataoka2, Taro Nishi1, Tomotaka Noda1, Sachiko Takahara3, and Kaori Togashi2
1Radiology, Kitano Hospital, The Tazuke Kofukai Medical Research Institute, Osaka, Japan, 2Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan, 3Breast Surgery, Kitano Hospital, The Tazuke Kofukai Medical Research Institute, Osaka, Japan

Our proposed DWI reading method based on the BI-RADS lexicons from multiple b-value images had comparable diagnostic performance to the standard BI-RADS. DWI reading method tended to show with higher specificity, and might increase diagnostic confidence in differentiating malignant and benign breast tumors. Excellent to substantial agreement was observed for DWI reading, and substantial agreement was found for mass type classifications between DWI and BI-RADS. Significant difference found in lesion conspicuity between malignant and benign tumors and ADC values assessmet may also provide confidence in tumor characterization.

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