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Abstract #0532

Combining Parallel Detection of Proton Spectroscopic Imaging (PEPSI) Measurements with a Data-Consistency Constraint Improves SNR

Shang-Yueh Tsai1, Ying-Hua Chu2, Yi-Cheng Hsu3, Wen-Jui Kuo4, Fa-Hsuan Lin2

1Graduate Institute of Applied Physics, National Cheng-Chi University, Taipei, Taiwan; 2Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan; 3Department of Mathematics, Nnational Taiwan University, Taipei, Taiwan; 4Institute of Neuroscience, National Yang-Ming University, Taipei, Taiwan

Fast MR spectroscopic imaging (MRSI) is challenged by its relative low signal-to-noise ratio (SNR), which can be improved by using a surface coil array. Instead of using a coil array to accelerate image encoding at the cost of the reduced SNR, here we propose to exploit this sensitivity information to enforce the k-space data-consistency (DC) in order to suppress noise and consequently to improve MRSI SNR. With in vivo experimental data at 3T using a 32-channel coil array, we found that the DC constraint can improve the SNR of PEPSI by approximately 40%.

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