Abstract #0554

Modified BI-RADS with high-resolution DWI: comparison with high-resolution contrast-enhanced imaging in different scanners and cohorts

Rie Ota¹, Akihiro Ikeda¹, Shotaro Kanao¹, Masako Kataoka², Mami Iima³, Maya Honda⁴, Mizue Suzuki¹, Naomi Kanamori⁵, Hiroyasu Yamashiro⁶, Nao Morii⁶, Takeshi Kubo¹, and Yuji Nakamoto²

¹Department of Radiology, Tenri Hosipital, Nara, Japan, ²Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University, Kyoto, Japan, ³Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging, Nagoya University Graduate School of Medicine, Nagoya, Japan, ⁴Department of Diagnostic Radiology, Kansai Electric Power Hospital, Osaka, Japan, ⁵Department of Diagnostic Pathology, Tenri Hosipital, Nara, Japan, ⁶Department of Breast Surgery, Tenri Hosipital, Nara, Japan

Synopsis

Keywords: Breast, Breast

Motivation: High-resolution diffusion-weighted imaging (HR-DWI) demonstrated substantial or almost perfect agreement with high-resolution contrast enhanced images (HR-CE) for lexicons and categories in a single-institution cohort¹. Its reproducibility in other institutions remains unknown.

Goal(s): We aimed to examine if this high agreement between HR-DWI and HR-CE is reproduced in a different institution.

Approach: Inter-method agreement in lexicons and categories were compared between the cohort 1 (n =108) and cohort 2 (n=35). Inter-method agreement was examined using Cohen’s kappa.

Results: HR-DWI and HR CE-showed moderate to good agreement in BI-RADS categorization (Weighted kappa 0.55 - 0.68). Internal signal/enhancement pattern showed good agreement (0.72 for both).

Impact: The result underpins the potential use of HR-DWI as a substitute of HR-CE.

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