Abstract #3185

Clinical feasibility of ultrafast lumbar spine magnetic resonance imaging: a preliminary report

Nobuo Kashiwagi¹, Yuichi Yamashita², Hitoshi Watanabe³, Hisashi Tanaka¹, Katsusuke Kyotani², Hiroto Takahashi¹, Chisato Matsuo¹, Takehisa Sakisuka¹, Azusa Miura¹, Masahiro Fujiwara¹, Atsuko Arisawa ¹, and Noriyuki Tomiyama¹

¹Osaka University Graduate School of Mediine, Suita, Japan, ²Canon Medical Systems Corporation, Otawara, Japan, ³Department of Radiology, Yukoukai General Hospital, Ibaraki, Japan

Using deep learning reconstruction, we developed an ultrafast lumbar MRI protocol with a total acquisition time of 1 minute 53 seconds. Compared with the standard MRI protocol, the interprotocol agreement for the classification of degenerative lumbar changes was almost perfect or substantial agreement with weighted kappa values of 0.72 to 0.84. The two protocols showed 100% concordance for the detection of clinically significant pathologies. Our preliminary study demonstrated that the ultrafast lumbar MRI protocol adequately preserved diagnostic equivalency with the standard protocol, suggesting that it could be an alternative protocol for restless patients and in an emergency setting.

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