Improving Non-Cartesian MRI Reconstruction through Discontinuity Subtraction
Non-Cartesian sampling is widely used for fast magnetic resonance imaging (MRI). Accurate and fast image reconstruction from non-Cartesian k-space data becomes a challenge and gains a lot of attention. Images provided by conventional direct reconstruction methods usually bear ringing, streaking, and...
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2006-01-01
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| Series: | International Journal of Biomedical Imaging |
| Online Access: | http://dx.doi.org/10.1155/IJBI/2006/87092 |
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| _version_ | 1850163546271252480 |
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| author | Jiayu Song Qing Huo Liu |
| author_facet | Jiayu Song Qing Huo Liu |
| author_sort | Jiayu Song |
| collection | DOAJ |
| description | Non-Cartesian sampling is widely used for fast magnetic
resonance imaging (MRI). Accurate and fast image reconstruction from
non-Cartesian k-space data becomes a challenge and gains a lot
of attention. Images provided by conventional direct reconstruction
methods usually bear ringing, streaking, and other leakage artifacts
caused by discontinuous structures. In this paper, we tackle these
problems by analyzing the principal point spread function (PSF) of
non-Cartesian reconstruction and propose a leakage reduction
reconstruction scheme based on discontinuity subtraction. Data
fidelity in k-space is enforced during each iteration.
Multidimensional nonuniform fast Fourier transform (NUFFT)
algorithms are utilized to simulate the k-space samples as well as to reconstruct images. The proposed method is
compared to the direct reconstruction method on computer-simulated
phantoms and physical scans. Non-Cartesian sampling trajectories
including 2D spiral, 2D and 3D radial trajectories are studied. The
proposed method is found useful on reducing artifacts due to high
image discontinuities. It also improves the quality of images
reconstructed from undersampled data. |
| format | Article |
| id | doaj-art-e89a2469cb764921a51d2ea98c02799d |
| institution | OA Journals |
| issn | 1687-4188 1687-4196 |
| language | English |
| publishDate | 2006-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Biomedical Imaging |
| spelling | doaj-art-e89a2469cb764921a51d2ea98c02799d2025-08-20T02:22:15ZengWileyInternational Journal of Biomedical Imaging1687-41881687-41962006-01-01200610.1155/IJBI/2006/8709287092Improving Non-Cartesian MRI Reconstruction through Discontinuity SubtractionJiayu Song0Qing Huo Liu1Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USADepartment of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USANon-Cartesian sampling is widely used for fast magnetic resonance imaging (MRI). Accurate and fast image reconstruction from non-Cartesian k-space data becomes a challenge and gains a lot of attention. Images provided by conventional direct reconstruction methods usually bear ringing, streaking, and other leakage artifacts caused by discontinuous structures. In this paper, we tackle these problems by analyzing the principal point spread function (PSF) of non-Cartesian reconstruction and propose a leakage reduction reconstruction scheme based on discontinuity subtraction. Data fidelity in k-space is enforced during each iteration. Multidimensional nonuniform fast Fourier transform (NUFFT) algorithms are utilized to simulate the k-space samples as well as to reconstruct images. The proposed method is compared to the direct reconstruction method on computer-simulated phantoms and physical scans. Non-Cartesian sampling trajectories including 2D spiral, 2D and 3D radial trajectories are studied. The proposed method is found useful on reducing artifacts due to high image discontinuities. It also improves the quality of images reconstructed from undersampled data.http://dx.doi.org/10.1155/IJBI/2006/87092 |
| spellingShingle | Jiayu Song Qing Huo Liu Improving Non-Cartesian MRI Reconstruction through Discontinuity Subtraction International Journal of Biomedical Imaging |
| title | Improving Non-Cartesian MRI Reconstruction through Discontinuity Subtraction |
| title_full | Improving Non-Cartesian MRI Reconstruction through Discontinuity Subtraction |
| title_fullStr | Improving Non-Cartesian MRI Reconstruction through Discontinuity Subtraction |
| title_full_unstemmed | Improving Non-Cartesian MRI Reconstruction through Discontinuity Subtraction |
| title_short | Improving Non-Cartesian MRI Reconstruction through Discontinuity Subtraction |
| title_sort | improving non cartesian mri reconstruction through discontinuity subtraction |
| url | http://dx.doi.org/10.1155/IJBI/2006/87092 |
| work_keys_str_mv | AT jiayusong improvingnoncartesianmrireconstructionthroughdiscontinuitysubtraction AT qinghuoliu improvingnoncartesianmrireconstructionthroughdiscontinuitysubtraction |