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Accelerated high-bandwidth MR spectroscopic imaging using compressed sensing
| Content Provider | Scilit |
|---|---|
| Author | Cao, Peng Shin, Peter J. Park, Ilwoo Najac, Chloe Marco-Rius, Irene Vigneron, Daniel B. Nelson, Sarah J. Ronen, Sabrina M. Larson, Peder E. Z. |
| Copyright Year | 2016 |
| Description | Journal: Magnetic Resonance in Medicine To develop a compressed sensing (CS) acceleration method with a high spectral bandwidth exploiting the spatial-spectral sparsity of MR spectroscopic imaging (MRSI). Accelerations were achieved using blip gradients during the readout to perform nonoverlapped and stochastically delayed random walks in kx -ky -t space, combined with block-Hankel matrix completion for efficient reconstruction. Both retrospective and prospective CS accelerations were applied to (13) C MRSI experiments, including in vivo rodent brain and liver studies with administrations of hyperpolarized [1-(13) C] pyruvate at 7.0 Tesla (T) and [2-(13) C] dihydroxyacetone at 3.0 T, respectively. In retrospective undersampling experiments using in vivo 7.0 T data, the proposed method preserved spectral, spatial, and dynamic fidelities with R(2) ≥ 0.96 and ≥ 0.87 for pyruvate and lactate signals, respectively, 750-Hz spectral separation, and up to 6.6-fold accelerations. In prospective in vivo experiments, with 3.8-fold acceleration, the proposed method exhibited excellent spatial localization of metabolites and peak recovery for pyruvate and lactate at 7.0 T as well as for dihydroxyacetone and its metabolic products with a 4.5-kHz spectral span (140 ppm at 3.0 T). This study demonstrated the feasibility of a new CS approach to accelerate high spectral bandwidth MRSI experiments. Magn Reson Med 76:369-379, 2016. © 2016 Wiley Periodicals, Inc. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4945498/pdf |
| Ending Page | 379 |
| Page Count | 11 |
| Starting Page | 369 |
| e-ISSN | 15222594 |
| DOI | 10.1002/mrm.26272 |
| Journal | Magnetic Resonance in Medicine |
| Issue Number | 2 |
| Volume Number | 76 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2016-05-26 |
| Access Restriction | Open |
| Subject Keyword | Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging Hankel Matrix Completion Mr Spectroscopic Imaging Calibrationless Parallel Imaging Compressed Sensing Hyperpolarized Carbon-13 Random Blip Gradients |
| Content Type | Text |
| Resource Type | Article |
