Considerations in applying compressed sensing to in vivo phosphorus MR spectroscopic imaging of human brain at 3T
Title | Considerations in applying compressed sensing to in vivo phosphorus MR spectroscopic imaging of human brain at 3T |
Publication Type | Journal Article |
Year of Publication | 2017 |
Authors | Hatay, GH, Yildirim, M, Ozturk-Isik, E |
Journal | Med Biol Eng ComputMed Biol Eng ComputMed Biol Eng Comput |
Volume | 55 |
Issue | 8 |
Pagination | 1303-1315 |
ISBN Number | 1741-0444 (Electronic)<br/>0140-0118 (Linking) |
Accession Number | 27826817 |
Abstract | The purpose of this study was to apply compressed sensing method for accelerated phosphorus MR spectroscopic imaging (31P-MRSI) of human brain in vivo at 3T. Fast 31P-MRSI data of five volunteers were acquired on a 3T clinical MR scanner using pulse-acquire sequence with a pseudorandom undersampling pattern for a data reduction factor of 5.33 and were reconstructed using compressed sensing. Additionally, simulated 31P-MRSI human brain tumor datasets were created to analyze the effects of k-space sampling pattern, data matrix size, regularization parameters of the reconstruction, and noise on the compressed sensing accelerated 31P-MRSI data. The 31P metabolite peak ratios of the full and compressed sensing accelerated datasets of healthy volunteers in vivo were similar according to the results of a Bland-Altman test. The estimated effective spatial resolution increased with reduction factor and sampling more at the k-space center. A lower regularization parameter for both total variation and L1-norm penalties resulted in a better compressed sensing reconstruction of 31P-MRSI. Although the root-mean-square error increased with noise levels, the compressed sensing reconstruction was robust for up to a reduction factor of 10 for the simulated data that had sharply defined tumor borders. As a result, compressed sensing was successfully applied to accelerate 31P-MRSI of human brain in vivo at 3T. |
Short Title | Medical & biological engineering & computingMedical & biological engineering & computing |
Alternate Journal | Medical & biological engineering & computing |