Abstract #0192

High-resolution DWI in the breast by Spatiotemporal encoding (SPEN): clinical utility in comparison with SS-EPI and RESOLVE

Rena Nakayama¹, Mami Iima^2,3, Masako Kataoka², Maya Honda^2,4, Yuta Urushibata⁵, Martins Otikovs⁶, Noam Nissan⁷, Lucio Frydman⁶, Rie Ota^2,8, Aika Okazawa², Kazuki Tsuji¹, Masakazu Toi⁹, and Yuji Nakamoto²

¹Kyoto University Faculty of Medicine, Kyoto, Japan, ²Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan, ³Institute for Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital, Kyoto, Japan, ⁴Diagnostic Radiology, Kansai Electric Power Hospital, Osaka, Japan, ⁵Siemens Healthcare K.K., Tokyo, Japan, ⁶Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, Israel, ⁷Radiology, Sheba-Medical-Center, Ramat-Gan, Israel, ⁸Tenri Hospital, Nara, Japan, ⁹Breast Surgery, Kyoto University Hospital, Kyoto, Japan

Synopsis

Keywords: Breast, BreastThis study investigated the breast lesion conspicuity and ADC reliability for 3 different DWI protocols; SPEN, SS-EPI, and RESOLVE. The in-plane resolution for SPEN and RESOLVE was 1x1mm², and SS-EPI was 2x2mm². SPEN showed a higher score for lesion conspicuity than SS-EPI, and a lower score than RESOLVE. ADC values in breast lesions were significantly lower in SPEN than others, presumably due to the choice of different b values, the sequences having different T1/T2 weightings, different robustness vs motions, the presence of unsuppressed fat, or different viewer systems used to analyze the data, which will need further investigation.

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