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Abstract #2294

The merged images with different central frequencies can reduce banding artifact of 3D-SSFP MR cisternography

Koji Matsumoto 1,2 , Hajime Yokota 3,4 , Hiroki Mukai 4 , Ken Motoori 4 , Toshiaki Miyachi 2 , Yoshitada Masuda 1 , and Takashi Uno 4

1 Department of Radiology, Chiba University Hospital, Chiba, Chiba, Japan, 2 Division of Health Sciences, Kanazawa University, Kanazawa, Ishikawa, Japan, 3 Department of Radiology, Kyoto Prefectural University of Medicine, Kyoto, Japan, 4 Diagnostic Radiology and Radiation Oncology, Chiba University, Chiba, Japan

Magnetic resonance (MR) cisternography using three dimensions steady-state free precession (3D-SSFP) is widely used for visualizing the inner ear. However, local magnetic field of the inner ear is easy to be heterogeneous due to surrounding air cells. The heterogeneity causes phase shift in pixels and banding artifact on 3D-SSFP. Although addiction of changing phase cycling is used to reduce banding artifact, it is available only in advanced machines. Varying central frequency can cause phase shift and change locations of banding artifact. The merged images with different central frequencies can reduce banding artifact of 3D-SSFP.

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