Design and Testing of a Radiofrequency Ellipsoidal Helmholtz Coil in Contrast with a Circular Pair for Nuclear Magnetic Resonance
The design and testing of a Helmholtz prototype probe with a relatively homogeneous radiofrequency field that can be used for MRI are presented in this paper. It consists of two coaxial separately tuned ellipsoidal rings of wire in a symmetric arrangement. The developed ellipsoidal structure is tes...
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| Format: | Article |
| Language: | English |
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D. G. Pylarinos
2023-06-01
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| Series: | Engineering, Technology & Applied Science Research |
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| Online Access: | https://etasr.com/index.php/ETASR/article/view/5945 |
| _version_ | 1797696143329591296 |
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| author | Khalid Al-Snaie |
| author_facet | Khalid Al-Snaie |
| author_sort | Khalid Al-Snaie |
| collection | DOAJ |
| description |
The design and testing of a Helmholtz prototype probe with a relatively homogeneous radiofrequency field that can be used for MRI are presented in this paper. It consists of two coaxial separately tuned ellipsoidal rings of wire in a symmetric arrangement. The developed ellipsoidal structure is tested experimentally in free space and is compared with the results obtained with an equivalent circular standard Helmholtz coil. Complete electrical modeling of the coils taking into account all couplings (inductive and capacitive) is studied. The proposed ellipsoidal Helmholtz coil provides better performance in terms of field homogeneity, efficiency, and quality factor. The width of the lobe at 10% for the ellipsoidal coil is 20% bigger. Moreover, a significant improvement in the quality factor is observed in free space. Also, the efficiency is increased by 37%. Finally, the Signal to Noise Ratio (SNR) of the ellipsoidal coil is higher than that of the circular coil.
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| first_indexed | 2024-03-12T03:21:57Z |
| format | Article |
| id | doaj.art-a4799ca2839d4cc0b5b6e72d06e1b778 |
| institution | Directory Open Access Journal |
| issn | 2241-4487 1792-8036 |
| language | English |
| last_indexed | 2024-03-12T03:21:57Z |
| publishDate | 2023-06-01 |
| publisher | D. G. Pylarinos |
| record_format | Article |
| series | Engineering, Technology & Applied Science Research |
| spelling | doaj.art-a4799ca2839d4cc0b5b6e72d06e1b7782023-09-03T13:56:31ZengD. G. PylarinosEngineering, Technology & Applied Science Research2241-44871792-80362023-06-0113310.48084/etasr.5945Design and Testing of a Radiofrequency Ellipsoidal Helmholtz Coil in Contrast with a Circular Pair for Nuclear Magnetic ResonanceKhalid Al-Snaie0Department of Electrical Engineering, College of Engineering, Imam Mohammad Ibn Saud Islamic University, Saudi Arabia The design and testing of a Helmholtz prototype probe with a relatively homogeneous radiofrequency field that can be used for MRI are presented in this paper. It consists of two coaxial separately tuned ellipsoidal rings of wire in a symmetric arrangement. The developed ellipsoidal structure is tested experimentally in free space and is compared with the results obtained with an equivalent circular standard Helmholtz coil. Complete electrical modeling of the coils taking into account all couplings (inductive and capacitive) is studied. The proposed ellipsoidal Helmholtz coil provides better performance in terms of field homogeneity, efficiency, and quality factor. The width of the lobe at 10% for the ellipsoidal coil is 20% bigger. Moreover, a significant improvement in the quality factor is observed in free space. Also, the efficiency is increased by 37%. Finally, the Signal to Noise Ratio (SNR) of the ellipsoidal coil is higher than that of the circular coil. https://etasr.com/index.php/ETASR/article/view/5945MRINMRradio frequencyRF coilellipsoidal configurationB1 homogeneity |
| spellingShingle | Khalid Al-Snaie Design and Testing of a Radiofrequency Ellipsoidal Helmholtz Coil in Contrast with a Circular Pair for Nuclear Magnetic Resonance Engineering, Technology & Applied Science Research MRI NMR radio frequency RF coil ellipsoidal configuration B1 homogeneity |
| title | Design and Testing of a Radiofrequency Ellipsoidal Helmholtz Coil in Contrast with a Circular Pair for Nuclear Magnetic Resonance |
| title_full | Design and Testing of a Radiofrequency Ellipsoidal Helmholtz Coil in Contrast with a Circular Pair for Nuclear Magnetic Resonance |
| title_fullStr | Design and Testing of a Radiofrequency Ellipsoidal Helmholtz Coil in Contrast with a Circular Pair for Nuclear Magnetic Resonance |
| title_full_unstemmed | Design and Testing of a Radiofrequency Ellipsoidal Helmholtz Coil in Contrast with a Circular Pair for Nuclear Magnetic Resonance |
| title_short | Design and Testing of a Radiofrequency Ellipsoidal Helmholtz Coil in Contrast with a Circular Pair for Nuclear Magnetic Resonance |
| title_sort | design and testing of a radiofrequency ellipsoidal helmholtz coil in contrast with a circular pair for nuclear magnetic resonance |
| topic | MRI NMR radio frequency RF coil ellipsoidal configuration B1 homogeneity |
| url | https://etasr.com/index.php/ETASR/article/view/5945 |
| work_keys_str_mv | AT khalidalsnaie designandtestingofaradiofrequencyellipsoidalhelmholtzcoilincontrastwithacircularpairfornuclearmagneticresonance |