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Abstract #2074

Introducing a structural similarity index and map for quality control in tractography performed using multi-band EPI

Yuichi Suzuki1, Akira Kunimatsu1, Kouhei Kamiya1, Masaki Katsura1, Harushi Mori1, Katsuya Maruyama2, Thorsten Feiweier3, Kenji Ino1, Yasushi Watanabe1, Jiro Sato1, Keiichi Yano1, and Kuni Ohtomo1

1The Department of Radiology, The University of Tokyo Hospital, Bunkyo-ku, Japan, 2Siemens Japan K.K., Shinagawa-ku, Japan, 3Siemens AG, Erlangen, Germany

We quantitatively evaluated the quality of tractography images captured using the multi-band EPI (MBEPI) compared with those obtained without using MBEPI. We also demonstrated the potential weakness of classic Dice similarity coefficients (DSCs) and introduced a structural similarity (SSIM) index and map as a new method for evaluating the quality of tractography images. A numerical evaluation was enabled by the SSIM index and that the SSIM map was advantageous in that it allows visual confirmation of the structural similarity ratio; in contrast, the DSCs only offered a numerical evaluation.

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