Low-field MRI at high magnetic field instability and inhomogeneity conditions
Understanding the effects of the magnetic field time instabilities in magnetic resonance imaging (MRI) is fundamental for the success of portable and low-cost MRI hardware based on electromagnets. In this work we propose a magnetic field model that considers the field instability in addition to the...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-11-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2023.1249771/full |
| _version_ | 1797641168508420096 |
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| author | Gonzalo G. Rodriguez Clemar A. Schürrer Esteban Anoardo |
| author_facet | Gonzalo G. Rodriguez Clemar A. Schürrer Esteban Anoardo |
| author_sort | Gonzalo G. Rodriguez |
| collection | DOAJ |
| description | Understanding the effects of the magnetic field time instabilities in magnetic resonance imaging (MRI) is fundamental for the success of portable and low-cost MRI hardware based on electromagnets. In this work we propose a magnetic field model that considers the field instability in addition to the inhomogeneity. We have successfully validated the model on signals acquired with a commercial NMR instrument. It was used to simulate the image defects due to different types of instability for both the spin-echo and the gradient-echo sequences. We have considered both random field fluctuations, and an instability having a dominant harmonic component. Strategies are suggested to minimize the artifacts generated by these instabilities. Images were acquired using a home-made MRI relaxometer to show the consistency of the analysis. |
| first_indexed | 2024-03-11T13:41:41Z |
| format | Article |
| id | doaj.art-b7035234fa5b45318ad5a0f8169ea705 |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-03-11T13:41:41Z |
| publishDate | 2023-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-b7035234fa5b45318ad5a0f8169ea7052023-11-02T12:16:37ZengFrontiers Media S.A.Frontiers in Physics2296-424X2023-11-011110.3389/fphy.2023.12497711249771Low-field MRI at high magnetic field instability and inhomogeneity conditionsGonzalo G. Rodriguez0Clemar A. Schürrer1Esteban Anoardo2Laboratorio de Relaxometría y Técnicas Especiales (LaRTE), FaMAF–Universidad Nacional de Córdoba (UNC) & IFEG-CONICET, Córdoba, ArgentinaCentro de Investigación y Transferencia en Metrología (CEMETRO), Facultad Regional Córdoba y FaMAF-UNC, Universidad Tecnológica Nacional, Córdoba, ArgentinaLaboratorio de Relaxometría y Técnicas Especiales (LaRTE), FaMAF–Universidad Nacional de Córdoba (UNC) & IFEG-CONICET, Córdoba, ArgentinaUnderstanding the effects of the magnetic field time instabilities in magnetic resonance imaging (MRI) is fundamental for the success of portable and low-cost MRI hardware based on electromagnets. In this work we propose a magnetic field model that considers the field instability in addition to the inhomogeneity. We have successfully validated the model on signals acquired with a commercial NMR instrument. It was used to simulate the image defects due to different types of instability for both the spin-echo and the gradient-echo sequences. We have considered both random field fluctuations, and an instability having a dominant harmonic component. Strategies are suggested to minimize the artifacts generated by these instabilities. Images were acquired using a home-made MRI relaxometer to show the consistency of the analysis.https://www.frontiersin.org/articles/10.3389/fphy.2023.1249771/fulllow-fieldfield instabilityMRIelectromagnetsfield inhomogeneity |
| spellingShingle | Gonzalo G. Rodriguez Clemar A. Schürrer Esteban Anoardo Low-field MRI at high magnetic field instability and inhomogeneity conditions Frontiers in Physics low-field field instability MRI electromagnets field inhomogeneity |
| title | Low-field MRI at high magnetic field instability and inhomogeneity conditions |
| title_full | Low-field MRI at high magnetic field instability and inhomogeneity conditions |
| title_fullStr | Low-field MRI at high magnetic field instability and inhomogeneity conditions |
| title_full_unstemmed | Low-field MRI at high magnetic field instability and inhomogeneity conditions |
| title_short | Low-field MRI at high magnetic field instability and inhomogeneity conditions |
| title_sort | low field mri at high magnetic field instability and inhomogeneity conditions |
| topic | low-field field instability MRI electromagnets field inhomogeneity |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2023.1249771/full |
| work_keys_str_mv | AT gonzalogrodriguez lowfieldmriathighmagneticfieldinstabilityandinhomogeneityconditions AT clemaraschurrer lowfieldmriathighmagneticfieldinstabilityandinhomogeneityconditions AT estebananoardo lowfieldmriathighmagneticfieldinstabilityandinhomogeneityconditions |