Assessment of a PML Boundary Condition for Simulating an MRI Radio Frequency Coil
Computational methods such as the finite difference time domain (FDTD) play an important role in simulating radiofrequency (RF) coils used in magnetic resonance imaging (MRI). The choice of absorbing boundary conditions affects the final outcome of such studies. We have used FDTD to assess the Bere...
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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/10.1155/2008/563196 |
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| author | Yunsuo Duan Tamer S. Ibrahim Bradley S. Peterson Feng Liu Alayar Kangarlu |
| author_facet | Yunsuo Duan Tamer S. Ibrahim Bradley S. Peterson Feng Liu Alayar Kangarlu |
| author_sort | Yunsuo Duan |
| collection | DOAJ |
| description | Computational methods such as the finite difference time domain (FDTD) play an important role in simulating radiofrequency (RF) coils used in magnetic resonance imaging (MRI). The choice of absorbing boundary conditions affects the final outcome of such studies. We have used FDTD to assess the Berenger's perfectly matched layer (PML) as an absorbing boundary condition for computation of the resonance patterns and electromagnetic fields of RF coils. We first experimentally constructed a high-pass birdcage head coil, measured its resonance pattern, and used it to acquire proton (1H) phantom MRI images. We then computed the resonance pattern and B1 field of the coil using FDTD with a PML as an absorbing boundary condition. We assessed the accuracy and efficiency of PML by adjusting the parameters of the PML and comparing the calculated results with measured ones. The optimal PML parameters that produce accurate (comparable to the experimental findings) FDTD calculations are then provided for the birdcage head coil operating at 127.72 MHz, the Larmor frequency of 1H at 3 Tesla (T). |
| format | Article |
| id | doaj-art-0ff107db8bd04e6ca2b2f83db4349278 |
| 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-0ff107db8bd04e6ca2b2f83db43492782025-08-20T03:54:29ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772008-01-01200810.1155/2008/563196563196Assessment of a PML Boundary Condition for Simulating an MRI Radio Frequency CoilYunsuo Duan0Tamer S. Ibrahim1Bradley S. Peterson2Feng Liu3Alayar Kangarlu4Columbia University and New York State Psychiatric Institute, New York, NY 10032, USAUniversity of Pittsburgh, Pittsburgh, PA 15260, USAColumbia University and New York State Psychiatric Institute, New York, NY 10032, USAColumbia University and New York State Psychiatric Institute, New York, NY 10032, USAColumbia University and New York State Psychiatric Institute, New York, NY 10032, USAComputational methods such as the finite difference time domain (FDTD) play an important role in simulating radiofrequency (RF) coils used in magnetic resonance imaging (MRI). The choice of absorbing boundary conditions affects the final outcome of such studies. We have used FDTD to assess the Berenger's perfectly matched layer (PML) as an absorbing boundary condition for computation of the resonance patterns and electromagnetic fields of RF coils. We first experimentally constructed a high-pass birdcage head coil, measured its resonance pattern, and used it to acquire proton (1H) phantom MRI images. We then computed the resonance pattern and B1 field of the coil using FDTD with a PML as an absorbing boundary condition. We assessed the accuracy and efficiency of PML by adjusting the parameters of the PML and comparing the calculated results with measured ones. The optimal PML parameters that produce accurate (comparable to the experimental findings) FDTD calculations are then provided for the birdcage head coil operating at 127.72 MHz, the Larmor frequency of 1H at 3 Tesla (T).http://dx.doi.org/10.1155/2008/563196 |
| spellingShingle | Yunsuo Duan Tamer S. Ibrahim Bradley S. Peterson Feng Liu Alayar Kangarlu Assessment of a PML Boundary Condition for Simulating an MRI Radio Frequency Coil International Journal of Antennas and Propagation |
| title | Assessment of a PML Boundary Condition for Simulating an MRI Radio Frequency Coil |
| title_full | Assessment of a PML Boundary Condition for Simulating an MRI Radio Frequency Coil |
| title_fullStr | Assessment of a PML Boundary Condition for Simulating an MRI Radio Frequency Coil |
| title_full_unstemmed | Assessment of a PML Boundary Condition for Simulating an MRI Radio Frequency Coil |
| title_short | Assessment of a PML Boundary Condition for Simulating an MRI Radio Frequency Coil |
| title_sort | assessment of a pml boundary condition for simulating an mri radio frequency coil |
| url | http://dx.doi.org/10.1155/2008/563196 |
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