Abstract #4315

Decomposition of off-resonance fields in brain MRI

Pei-Yan Li¹, Pu-Yeh Wu¹, Yi-Tien Li^1,2, Ying-Hua Chu¹, and Fa-Hsuan Lin¹

¹Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan, ²Department of medical imaging, Taipei Medical University-Shuang Ho Hospital, New Taipei, Taiwan

We measured the off-resonance distributions from 31 subjects and decomposed these maps into orthogonal modes by Singular Value Decomposition. We found that the six SVD modes can account for the off-resonance up to 80%. Decomposed modes of off-resonance can be used for tailored shim coil design.

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