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Objective: Magnetic resonance spectroscopic imaging (MRSI) signals are often corrupted by residual water and artifacts. Residual water suppression plays an important role in accurate and efficient quantification of metabolites from MRSI. A tensor-based method for suppressing residual water is proposed. Methods: A third-order tensor is constructed by stacking the Lo&#x0308;wner matrices corresponding to each MRSI voxel spectrum along the third mode. A canonical polyadic decomposition is applied on the tensor to extract the water component and to, subsequently, remove it from the original MRSI signals. Results: The proposed method applied on both simulated and in-vivo MRSI signals showed good water suppression performance. Conclusion: The tensor-based Lo&#x0308;wner method has better performance in suppressing residual water in MRSI signals as compared to the widely used subspace-based Hankel singular value decomposition method. Significance: A tensor method suppresses residual water simultaneously from all the voxels in the MRSI grid and helps in preventing the failure of the water suppression in single voxels.

ieee transactions on biomedical engineering

Tensor-Based Method for Residual Water Suppression in <inline-formula><tex-math notation="LaTeX">$^1$</tex-math></inline-formula>H Magnetic Resonance Spectroscopic Imaging

Tensor-Based Method for Residual Water Suppression in $^1$H Magnetic Resonance Spectroscopic Imaging