An Antenna-Theory Method for Modeling High-Frequency RF Coils: A Segmented Birdcage Example
We suggest that center-fed dipole antenna analytics can be employed in the optimized design of high-frequency MRI RF coil applications. The method is illustrated in the design of a single-segmented birdcage model and a short multisegmented birdcage model. As a byproduct, it is shown that for a long...
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| Format: | Article |
| Language: | English |
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Wiley
2008-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2008/456019 |
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| author | Xin Chen Victor Taracila Timothy Eagan Hiroyuki Fujita Xingxian Shou Tanvir Baig Robert Brown |
| author_facet | Xin Chen Victor Taracila Timothy Eagan Hiroyuki Fujita Xingxian Shou Tanvir Baig Robert Brown |
| author_sort | Xin Chen |
| collection | DOAJ |
| description | We suggest that center-fed dipole antenna analytics can be employed in the optimized design of high-frequency MRI RF coil applications. The method is illustrated in the design of a single-segmented birdcage model and a short multisegmented birdcage model. As a byproduct, it is shown that for a long single-segmented birdcage model, the RF field within it is essentially a TEM mode and has excellent planar uniformity. For a short shielded multisegmented birdcage model, the RF field is optimized with a target-field approach with an average SAR functional. The planar homogeneity of the optimized RF field is significantly improved compared with that of a single-segmented birdcage model with the same geometry. The accuracy of the antenna formulae is also verified with numerical simulations performed via commercial software. The model discussed herein provides evidence for the effectiveness of antenna methods in future RF coil analysis. |
| format | Article |
| id | doaj-art-b19855c41b8948078582bc7e56ea1417 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2008-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-b19855c41b8948078582bc7e56ea14172025-02-03T01:21:49ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772008-01-01200810.1155/2008/456019456019An Antenna-Theory Method for Modeling High-Frequency RF Coils: A Segmented Birdcage ExampleXin Chen0Victor Taracila1Timothy Eagan2Hiroyuki Fujita3Xingxian Shou4Tanvir Baig5Robert Brown6Department of Physics, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USAGE Healthcare, Aurora, OH 44202, USAPhilips Medical Systems, Highland Heights, OH 44143, USADepartment of Physics, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USADepartment of Physics, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USADepartment of Physics, University of Dhaka, Dhaka 1000, BangladeshDepartment of Physics, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USAWe suggest that center-fed dipole antenna analytics can be employed in the optimized design of high-frequency MRI RF coil applications. The method is illustrated in the design of a single-segmented birdcage model and a short multisegmented birdcage model. As a byproduct, it is shown that for a long single-segmented birdcage model, the RF field within it is essentially a TEM mode and has excellent planar uniformity. For a short shielded multisegmented birdcage model, the RF field is optimized with a target-field approach with an average SAR functional. The planar homogeneity of the optimized RF field is significantly improved compared with that of a single-segmented birdcage model with the same geometry. The accuracy of the antenna formulae is also verified with numerical simulations performed via commercial software. The model discussed herein provides evidence for the effectiveness of antenna methods in future RF coil analysis.http://dx.doi.org/10.1155/2008/456019 |
| spellingShingle | Xin Chen Victor Taracila Timothy Eagan Hiroyuki Fujita Xingxian Shou Tanvir Baig Robert Brown An Antenna-Theory Method for Modeling High-Frequency RF Coils: A Segmented Birdcage Example International Journal of Antennas and Propagation |
| title | An Antenna-Theory Method for Modeling High-Frequency RF Coils: A Segmented Birdcage Example |
| title_full | An Antenna-Theory Method for Modeling High-Frequency RF Coils: A Segmented Birdcage Example |
| title_fullStr | An Antenna-Theory Method for Modeling High-Frequency RF Coils: A Segmented Birdcage Example |
| title_full_unstemmed | An Antenna-Theory Method for Modeling High-Frequency RF Coils: A Segmented Birdcage Example |
| title_short | An Antenna-Theory Method for Modeling High-Frequency RF Coils: A Segmented Birdcage Example |
| title_sort | antenna theory method for modeling high frequency rf coils a segmented birdcage example |
| url | http://dx.doi.org/10.1155/2008/456019 |
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