Abstract #2552

Diagnostic value of 5b and 2b-value-DWI in breast tumors: comparison with combined MRI

Aika Okazawa¹, Mami Iima^1,2, Masako Kataoka¹, Ryosuke Okumura³, Sachiko Takahara⁴, Tomotaka Noda⁵, Taro Nishi⁵, Takayoshi Ishimori³, Maya Honda^1,6, and Yuji Nakamoto¹

¹Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan, ²Institute for Advancement of Clinical and Translational Science, Kyoto University Hospital, Kyoto, Japan, ³Department of Diagnostic Radiology, Kitano Hospital, Tazuke Kofukai Medical Research Institute, Osaka, Japan, ⁴Department of Breast Surgery, Kitano Hospital, The Tazuke Kofukai Medical Research Institute, Osaka, Japan, ⁵Department of Clinical Radiology Service, Kitano Hospital, The Tazuke Kofukai Medical Research Institute, Osaka, Japan, ⁶Department of Diagnostic Radiology, Kansai Electric Power Hospital, Osaka, Japan

Synopsis

Keywords: Breast, Diffusion/other diffusion imaging techniques

We propose a DWI-reading method based on the an adjusted BI-RADS lexicons using five b values of 0, 200, 800, 1000, and 1500 s/mm²(5b-value-DWI). Diagnostic performance was evaluated in comparison with BI-RADS lexicons from standard BI-RADS DCE MRI and a DWI-reading method based on the adjusted BI-RADS lexicons using two b values of 0, 800 s/mm² (2b-value-DWI).Our proposed DWI reading methods achieved diagnostic performance comparable to the standard BI-RADS. With higher sensitivity and NPV in 5b-value-DWI compared to 2b-value-DWI, DWI reading with 5b-values has the potential to increase diagnostic confidence in differentiating malignant and benign breast tumors.

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