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Tensor Based Method for Residual Water Suppression in H Magnetic Resonance Spectroscopic Imaging.
IEEE Transactions on Bio-medical Engineering 2018 July 6
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 Lowner matrices corresponding to each MRSI voxel spectrum along the third mode. A canonical polyadic decomposition (CPD) 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 Lowner method has better performance in suppressing residual water in MRSI signals as compared to the widely-used subspace-based Hankel singular value decomposition (HSVD) 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.
METHODS: A third-order tensor is constructed by stacking the Lowner matrices corresponding to each MRSI voxel spectrum along the third mode. A canonical polyadic decomposition (CPD) 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 Lowner method has better performance in suppressing residual water in MRSI signals as compared to the widely-used subspace-based Hankel singular value decomposition (HSVD) 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.
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