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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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