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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