A Modified Phase Cycling Method for Complex-Valued MRI Reconstruction
The phase cycling method is a state-of-the-art method to reconstruct complex-valued MR image. However, when it follows practical two-dimensional (2D) subsampling Cartesian acquisition which is only enforcing random sampling in the phase-encoding direction, a number of artifacts in magnitude appear....
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Format: | Article |
Language: | English |
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Wiley
2020-01-01
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Series: | International Journal of Biomedical Imaging |
Online Access: | http://dx.doi.org/10.1155/2020/8846220 |
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author | Wei He Yu Zhang Junling Ding Linman Zhao |
author_facet | Wei He Yu Zhang Junling Ding Linman Zhao |
author_sort | Wei He |
collection | DOAJ |
description | The phase cycling method is a state-of-the-art method to reconstruct complex-valued MR image. However, when it follows practical two-dimensional (2D) subsampling Cartesian acquisition which is only enforcing random sampling in the phase-encoding direction, a number of artifacts in magnitude appear. A modified approach is proposed to remove these artifacts under practical MRI subsampling, by adding one-dimensional total variation (TV) regularization into the phase cycling method to “pre-process” the magnitude component before its update. Furthermore, an operation used in SFISTA is employed to update the magnitude and phase images for better solutions. The results of the experiments show the ability of the proposed method to eliminate the ring artifacts and improve the magnitude reconstruction. |
format | Article |
id | doaj-art-5bd77dfa44ef4bfd9bdab14d61ea1a8b |
institution | Kabale University |
issn | 1687-4188 1687-4196 |
language | English |
publishDate | 2020-01-01 |
publisher | Wiley |
record_format | Article |
series | International Journal of Biomedical Imaging |
spelling | doaj-art-5bd77dfa44ef4bfd9bdab14d61ea1a8b2025-02-03T05:57:19ZengWileyInternational Journal of Biomedical Imaging1687-41881687-41962020-01-01202010.1155/2020/88462208846220A Modified Phase Cycling Method for Complex-Valued MRI ReconstructionWei He0Yu Zhang1Junling Ding2Linman Zhao3Department of Computer Science and Technology, Xinyang Normal University, Xinyang 464000, ChinaDepartment of Computer Science and Technology, Xinyang Normal University, Xinyang 464000, ChinaHenan University of Chinese Medicine, Zhengzhou 450046, ChinaDepartment of Computer Science and Technology, Xinyang Normal University, Xinyang 464000, ChinaThe phase cycling method is a state-of-the-art method to reconstruct complex-valued MR image. However, when it follows practical two-dimensional (2D) subsampling Cartesian acquisition which is only enforcing random sampling in the phase-encoding direction, a number of artifacts in magnitude appear. A modified approach is proposed to remove these artifacts under practical MRI subsampling, by adding one-dimensional total variation (TV) regularization into the phase cycling method to “pre-process” the magnitude component before its update. Furthermore, an operation used in SFISTA is employed to update the magnitude and phase images for better solutions. The results of the experiments show the ability of the proposed method to eliminate the ring artifacts and improve the magnitude reconstruction.http://dx.doi.org/10.1155/2020/8846220 |
spellingShingle | Wei He Yu Zhang Junling Ding Linman Zhao A Modified Phase Cycling Method for Complex-Valued MRI Reconstruction International Journal of Biomedical Imaging |
title | A Modified Phase Cycling Method for Complex-Valued MRI Reconstruction |
title_full | A Modified Phase Cycling Method for Complex-Valued MRI Reconstruction |
title_fullStr | A Modified Phase Cycling Method for Complex-Valued MRI Reconstruction |
title_full_unstemmed | A Modified Phase Cycling Method for Complex-Valued MRI Reconstruction |
title_short | A Modified Phase Cycling Method for Complex-Valued MRI Reconstruction |
title_sort | modified phase cycling method for complex valued mri reconstruction |
url | http://dx.doi.org/10.1155/2020/8846220 |
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