Full-Wave Simulation of a Helmholtz Radiofrequency Coil for Magnetic Resonance Applications
Magnetic resonance imaging (MRI) is a non-invasive diagnostic technique able to provide information about the anatomical, structural, and functional properties of different organs. A magnetic resonance (MR) scanner employs radiofrequency (RF) coils to generate a magnetic field to excite the nuclei i...
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MDPI AG
2024-09-01
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| Online Access: | https://www.mdpi.com/2227-7080/12/9/150 |
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| author | Giulio Giovannetti Denis Burov Angelo Galante Francesca Frijia |
| author_facet | Giulio Giovannetti Denis Burov Angelo Galante Francesca Frijia |
| author_sort | Giulio Giovannetti |
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| description | Magnetic resonance imaging (MRI) is a non-invasive diagnostic technique able to provide information about the anatomical, structural, and functional properties of different organs. A magnetic resonance (MR) scanner employs radiofrequency (RF) coils to generate a magnetic field to excite the nuclei in the sample (transmit coil) and pick up the signals emitted by the nuclei (receive coil). To avoid trial-and-error approaches and optimize the RF coil performance for a given application, accurate design and simulation processes must be performed. We describe the full-wave simulation of a Helmholtz coil for high-field MRI performed with the finite-difference time-domain (FDTD) method, investigating magnetic field pattern differences between loaded and unloaded conditions. Moreover, the self-inductance of the single loops constituting the Helmholtz coil was estimated, as well as the frequency splitting between loops due to inductive coupling and the sample-induced resistance. The result accuracy was verified with data acquired with a Helmholtz prototype for small phantom experiments with a 3T MR clinical scanner. Finally, the magnetic field variations and coil detuning after the insertion of the RF shield were evaluated. |
| format | Article |
| id | doaj-art-3d207c49b884415dbb725a7fd7120e49 |
| institution | OA Journals |
| issn | 2227-7080 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Technologies |
| spelling | doaj-art-3d207c49b884415dbb725a7fd7120e492025-08-20T01:55:52ZengMDPI AGTechnologies2227-70802024-09-0112915010.3390/technologies12090150Full-Wave Simulation of a Helmholtz Radiofrequency Coil for Magnetic Resonance ApplicationsGiulio Giovannetti0Denis Burov1Angelo Galante2Francesca Frijia3Institute of Clinical Physiology, National Council of Research, 56124 Pisa, ItalyDepartment of Physical and Chemical Sciences, University of L’Aquila, 67100 L’Aquila, ItalyDepartment of Life, Health & Environmental Sciences, University of L’Aquila, 67100 L’Aquila, ItalyBioengineering Unit, Fondazione Toscana G. Monasterio, 56124 Pisa, ItalyMagnetic resonance imaging (MRI) is a non-invasive diagnostic technique able to provide information about the anatomical, structural, and functional properties of different organs. A magnetic resonance (MR) scanner employs radiofrequency (RF) coils to generate a magnetic field to excite the nuclei in the sample (transmit coil) and pick up the signals emitted by the nuclei (receive coil). To avoid trial-and-error approaches and optimize the RF coil performance for a given application, accurate design and simulation processes must be performed. We describe the full-wave simulation of a Helmholtz coil for high-field MRI performed with the finite-difference time-domain (FDTD) method, investigating magnetic field pattern differences between loaded and unloaded conditions. Moreover, the self-inductance of the single loops constituting the Helmholtz coil was estimated, as well as the frequency splitting between loops due to inductive coupling and the sample-induced resistance. The result accuracy was verified with data acquired with a Helmholtz prototype for small phantom experiments with a 3T MR clinical scanner. Finally, the magnetic field variations and coil detuning after the insertion of the RF shield were evaluated.https://www.mdpi.com/2227-7080/12/9/150magnetic resonanceradiofrequency coilsHelmholtz coilsimulationFDTD method |
| spellingShingle | Giulio Giovannetti Denis Burov Angelo Galante Francesca Frijia Full-Wave Simulation of a Helmholtz Radiofrequency Coil for Magnetic Resonance Applications Technologies magnetic resonance radiofrequency coils Helmholtz coil simulation FDTD method |
| title | Full-Wave Simulation of a Helmholtz Radiofrequency Coil for Magnetic Resonance Applications |
| title_full | Full-Wave Simulation of a Helmholtz Radiofrequency Coil for Magnetic Resonance Applications |
| title_fullStr | Full-Wave Simulation of a Helmholtz Radiofrequency Coil for Magnetic Resonance Applications |
| title_full_unstemmed | Full-Wave Simulation of a Helmholtz Radiofrequency Coil for Magnetic Resonance Applications |
| title_short | Full-Wave Simulation of a Helmholtz Radiofrequency Coil for Magnetic Resonance Applications |
| title_sort | full wave simulation of a helmholtz radiofrequency coil for magnetic resonance applications |
| topic | magnetic resonance radiofrequency coils Helmholtz coil simulation FDTD method |
| url | https://www.mdpi.com/2227-7080/12/9/150 |
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