Simulation Design of Incremental Leg Tapered Birdcage Coil for Head Imaging at 4.7T MRI
This study analyzed asymmetrical designs of birdcage (BC) coils, for which the conventional shape of the BC is modified in order to improve field intensity and uniformity in the brain region for magnetic resonance imaging (MRI) at 4.7T. Typically the BC coil has insufficient field uniformity when op...
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MDPI AG
2021-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/5/2064 |
| _version_ | 1797395140867784704 |
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| author | Hyunwoo Song Kyoung-Nam Kim Daniel Hernandez |
| author_facet | Hyunwoo Song Kyoung-Nam Kim Daniel Hernandez |
| author_sort | Hyunwoo Song |
| collection | DOAJ |
| description | This study analyzed asymmetrical designs of birdcage (BC) coils, for which the conventional shape of the BC is modified in order to improve field intensity and uniformity in the brain region for magnetic resonance imaging (MRI) at 4.7T. Typically the BC coil has insufficient field uniformity when operating at higher frequencies such as 200 MHz, corresponding to the Larmor frequency at 4.7T, due to the interaction between the electrical properties of body tissue and the propagated magnetic field wavelength. We propose a new design of BC coil, which consists of different ring diameters and leg width. The performance of proposed designs was compared to that of a head-size BC coil. Using finite-difference time-domain simulations to obtain the |<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>B</mi><mn>1</mn><mo>+</mo></msubsup></mrow></semantics></math></inline-formula>| fields for a human model, we demonstrate that the proposed designs can achieve better field intensity and uniformity compared with other BC coil designs. |
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| language | English |
| last_indexed | 2024-03-09T00:31:07Z |
| publishDate | 2021-02-01 |
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| spelling | doaj.art-0bd94875a3ad4a0f86578b52e0ff6abb2023-12-11T18:30:01ZengMDPI AGApplied Sciences2076-34172021-02-01115206410.3390/app11052064Simulation Design of Incremental Leg Tapered Birdcage Coil for Head Imaging at 4.7T MRIHyunwoo Song0Kyoung-Nam Kim1Daniel Hernandez2Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, KoreaDepartment of Biomedical Engineering, Medical Campus, Gachon University, Incheon 21936, KoreaDepartment of Biomedical Engineering, Medical Campus, Gachon University, Incheon 21936, KoreaThis study analyzed asymmetrical designs of birdcage (BC) coils, for which the conventional shape of the BC is modified in order to improve field intensity and uniformity in the brain region for magnetic resonance imaging (MRI) at 4.7T. Typically the BC coil has insufficient field uniformity when operating at higher frequencies such as 200 MHz, corresponding to the Larmor frequency at 4.7T, due to the interaction between the electrical properties of body tissue and the propagated magnetic field wavelength. We propose a new design of BC coil, which consists of different ring diameters and leg width. The performance of proposed designs was compared to that of a head-size BC coil. Using finite-difference time-domain simulations to obtain the |<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>B</mi><mn>1</mn><mo>+</mo></msubsup></mrow></semantics></math></inline-formula>| fields for a human model, we demonstrate that the proposed designs can achieve better field intensity and uniformity compared with other BC coil designs.https://www.mdpi.com/2076-3417/11/5/2064MRIradiofrequency coilultrahigh frequencybirdcage coilradiofrequency simulationfocus birdcage |
| spellingShingle | Hyunwoo Song Kyoung-Nam Kim Daniel Hernandez Simulation Design of Incremental Leg Tapered Birdcage Coil for Head Imaging at 4.7T MRI Applied Sciences MRI radiofrequency coil ultrahigh frequency birdcage coil radiofrequency simulation focus birdcage |
| title | Simulation Design of Incremental Leg Tapered Birdcage Coil for Head Imaging at 4.7T MRI |
| title_full | Simulation Design of Incremental Leg Tapered Birdcage Coil for Head Imaging at 4.7T MRI |
| title_fullStr | Simulation Design of Incremental Leg Tapered Birdcage Coil for Head Imaging at 4.7T MRI |
| title_full_unstemmed | Simulation Design of Incremental Leg Tapered Birdcage Coil for Head Imaging at 4.7T MRI |
| title_short | Simulation Design of Incremental Leg Tapered Birdcage Coil for Head Imaging at 4.7T MRI |
| title_sort | simulation design of incremental leg tapered birdcage coil for head imaging at 4 7t mri |
| topic | MRI radiofrequency coil ultrahigh frequency birdcage coil radiofrequency simulation focus birdcage |
| url | https://www.mdpi.com/2076-3417/11/5/2064 |
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