Accelerating chemical exchange saturation transfer MRI with parallel blind compressed sensing

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Huajun SheElena Vinogradov

Abstract

Chemical exchange saturation transfer is a novel and promising MRI contrast method, but it can be time-consuming. Common parallel imaging methods, like SENSE, can lead to reduced quality of CEST. Here, parallel blind compressed sensing (PBCS), combining blind compressed sensing (BCS) and parallel imaging, is evaluated for the acceleration of CEST in brain and breast. The CEST data were collected in phantoms, brain (N = 3), and breast (N = 2). Retrospective Cartesian undersampling was implemented and the reconstruction results of PBCS-CEST were compared with BCS-CEST and k-t sparse-SENSE CEST. The normalized RMSE and the high-frequency error norm were used for quantitative comparison. In phantom and in vivo brain experiments, the acceleration factor of R = 10 (24 k-space lines) was achieved and in breast R = 5 (30 k-space lines), without compromising the quality of the PBCS-reconstructed magnetization transfer rate asymmetry maps and Z-spectra. Parallel BCS provides better reconstruction quality when compared with BCS, k-t sparse-SENSE, and SENSE methods using the same number of samples. Parallel BCS overperforms BCS, indicating that the inclusion of coil sensitivity improves the reconstruction of the CEST data. The PBCS method ...Continue Reading

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Citations

Jun 19, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Hye-Young HeoJinyuan Zhou
Jul 3, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yi ZhangPaul A Bottomley
Jul 6, 2020·NMR in Biomedicine·Grzegorz Kwiatkowski, Sebastian Kozerke
Dec 21, 2019·Molecular Imaging and Biology : MIB : the Official Publication of the Academy of Molecular Imaging·Dong-Hoon LeeDong-Cheol Woo
Jul 25, 2019·Journal of Magnetic Resonance·Elena Vinogradov
Feb 27, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Andrzej LiebertArmin M Nagel
Jun 25, 2021·Physics in Medicine and Biology·Bonnie LamMoriel Vandsburger

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