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Abstract #4442

Translational Motion Compensation for 3D FSE Parallel Imaging using Autocalibration Signals

Chaoping Zhang1,2, Stefan Klein1,2, Alexandra Cristobal-Huerta2, Juan Antonio Hernandez-Tamames2, and Dirk H.J. Poot1,2

1Department of Medical Informatics, Erasmus MC, Rotterdam, Netherlands, 2Department of Radiology and Nuclear Medicine, Erasmus MC, Rotterdam, Netherlands

Motion during scanning deteriorates MR image quality, especially in 3D fast spin echo (FSE) acquisitions which typically require long acquisition time, even with parallel imaging. Instead of prospective motion compensation which is often difficult to perform, we propose a retrospective translational motion compensation method using autocalibration signals. The proposed method estimates the motion by minimizing the GRAPPA prediction error of the motion corrected signal in the autocalibration signal region. In-vivo experimental results demonstrate the effectiveness of our method.

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