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Abstract #0148

The diagnostic performance of modified BI-RADS using high-resolution diffusion weighted images (HR-DWI), T1WI and T2WI

Rie Ota1, Masako Kataoka1, Mami Iima1, Ayami Ohno Kishimoto2, Maya Honda3, Kanae Kawai Miyake1, Yosuke Yamada4, Yasuhide Takeuchi4, Masakazu Toi5, and Yuji Nakamoto1
1Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University graduate school of medicine, Kyoto, Japan, 2Department of Diagnostic Radiology, Kyoto Katsura Hospital, Kyoto, Japan, 3Department of Diagnostic Radiology, Kansai Electric Power Hospital, Osaka, Japan, 4Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan, 5Department of Breast Surgery, Kyoto University Hospital, Kyoto, Japan


This study aimed to evaluate the diagnostic performance of non-contrast protocol combining high-resolution diffusion weighted images (HR-DWI) with rs-EPI, T1WI and T2WI, using modified BI-RADS. In total, 98 breast lesions (60 malignant and 38 benign lesions) were categorized and compared to the pathological diagnosis. Area under the ROC curve (AUC)s of the non-contrast protocol were 0.90 (95% confidence interval (95%CI) : 0.82-0.95) for both readers. When excluding cases in which ADC value could not be measured, the AUC values were improved. Non-contrast protocol with modified BI-RADS can be used to evaluate breast lesions.

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