Use of nonlinear pulsed magnetic fields for spatial encoding in magnetic resonance imaging
Abstract This study examines the use of nonlinear magnetic field coils for spatial encoding in magnetic resonance imaging. Existing theories on imaging with such coils share a complex reconstruction process that originates from a suboptimal signal interpretation in the spatial-frequency domain (k-sp...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-03-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-58229-x |
| _version_ | 1797233584099033088 |
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| author | Kaja Tušar Igor Serša |
| author_facet | Kaja Tušar Igor Serša |
| author_sort | Kaja Tušar |
| collection | DOAJ |
| description | Abstract This study examines the use of nonlinear magnetic field coils for spatial encoding in magnetic resonance imaging. Existing theories on imaging with such coils share a complex reconstruction process that originates from a suboptimal signal interpretation in the spatial-frequency domain (k-space). In this study, a new solution to this problem is proposed, namely a two-step reconstruction process, in which in the first step, the image signal is converted into a frequency spectrum, and in the second step, the spectrum, which represents the distorted image, is geometrically and intensity corrected to obtain an undistorted image. This theory has been verified by numerical simulations and experimentally using a straight wire as a coil model for an extremely nonlinear magnetic field. The results of this study facilitate the use of simple encoding coil designs that can feature low inductance, allowing for much faster switching times and higher magnetic field gradients. |
| first_indexed | 2024-04-24T16:18:29Z |
| format | Article |
| id | doaj.art-3ceb92eddb0243e9bcaa616fe94d95c8 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-24T16:18:29Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-3ceb92eddb0243e9bcaa616fe94d95c82024-03-31T11:18:30ZengNature PortfolioScientific Reports2045-23222024-03-0114111410.1038/s41598-024-58229-xUse of nonlinear pulsed magnetic fields for spatial encoding in magnetic resonance imagingKaja Tušar0Igor Serša1Jožef Stefan International Postgraduate SchoolJožef Stefan InstituteAbstract This study examines the use of nonlinear magnetic field coils for spatial encoding in magnetic resonance imaging. Existing theories on imaging with such coils share a complex reconstruction process that originates from a suboptimal signal interpretation in the spatial-frequency domain (k-space). In this study, a new solution to this problem is proposed, namely a two-step reconstruction process, in which in the first step, the image signal is converted into a frequency spectrum, and in the second step, the spectrum, which represents the distorted image, is geometrically and intensity corrected to obtain an undistorted image. This theory has been verified by numerical simulations and experimentally using a straight wire as a coil model for an extremely nonlinear magnetic field. The results of this study facilitate the use of simple encoding coil designs that can feature low inductance, allowing for much faster switching times and higher magnetic field gradients.https://doi.org/10.1038/s41598-024-58229-x |
| spellingShingle | Kaja Tušar Igor Serša Use of nonlinear pulsed magnetic fields for spatial encoding in magnetic resonance imaging Scientific Reports |
| title | Use of nonlinear pulsed magnetic fields for spatial encoding in magnetic resonance imaging |
| title_full | Use of nonlinear pulsed magnetic fields for spatial encoding in magnetic resonance imaging |
| title_fullStr | Use of nonlinear pulsed magnetic fields for spatial encoding in magnetic resonance imaging |
| title_full_unstemmed | Use of nonlinear pulsed magnetic fields for spatial encoding in magnetic resonance imaging |
| title_short | Use of nonlinear pulsed magnetic fields for spatial encoding in magnetic resonance imaging |
| title_sort | use of nonlinear pulsed magnetic fields for spatial encoding in magnetic resonance imaging |
| url | https://doi.org/10.1038/s41598-024-58229-x |
| work_keys_str_mv | AT kajatusar useofnonlinearpulsedmagneticfieldsforspatialencodinginmagneticresonanceimaging AT igorsersa useofnonlinearpulsedmagneticfieldsforspatialencodinginmagneticresonanceimaging |