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Abstract #4835

Rotating sample acquisition in ultra-low-field MRI

Yi-Cheng Hsu 1 , Koos C. J. Zevenhoven 2 , Ying-Hua Chu 1 , Juhani Dabek 2 , Risto J. Ilmoniemi 2 , and Fa-Hsuan Lin 1,2

1 National Taiwan University, Taipei, Taiwan, 2 Department of Biomedical Engineering and Computa of Biomedical Engineering and Computational Science, Aalto University, Finland

We propose the rotating sample acquisition (RSA) to achieve efficient ultra-low-field MRI (ULF-MRI). Specifically, the sample rotates in the instrument and we measure ULF-MRI signals without any phase encoding. The concomitant field artifacts can be minimized because only frequency encoding is used. Using empirical data, we demonstrate that RSA is more efficient than conventional Fourier encoding when only three SQUID sensors are used. The RSA method holds promise for a portable imaging system using no phase encoding gradients and few NMR signal detectors.

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