Computational and experimental evaluation of the Tic-Tac-Toe RF coil for 7 Tesla MRI.
A variety of 7 Tesla RF coil systems have been proposed to produce spin excitation (B1+ field) and MR image acquisition. Different groups have attempted to mitigate the challenges at high and ultra-high field MRI by proposing novel hardware and software solutions to obtain uniformly high spin excita...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2019-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0209663 |
| _version_ | 1818586687529287680 |
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| author | Narayanan Krishnamurthy Tales Santini Sossena Wood Junghwan Kim Tiejun Zhao Howard J Aizenstein Tamer S Ibrahim |
| author_facet | Narayanan Krishnamurthy Tales Santini Sossena Wood Junghwan Kim Tiejun Zhao Howard J Aizenstein Tamer S Ibrahim |
| author_sort | Narayanan Krishnamurthy |
| collection | DOAJ |
| description | A variety of 7 Tesla RF coil systems have been proposed to produce spin excitation (B1+ field) and MR image acquisition. Different groups have attempted to mitigate the challenges at high and ultra-high field MRI by proposing novel hardware and software solutions to obtain uniformly high spin excitation at acceptable RF absorption levels. In this study, we extensively compare the designs of two distributed-circuit based RF coils: the Tic-Tac-Toe (TTT) head coil and TEM head coil on multiple anatomically detailed head models and in-vivo. Bench measurements of s-parameters and experimental B1+ field distribution were obtained in volunteers and compared with numerical simulations. RF absorption, quantified by both average and peak SAR, and B1+ field intensity and homogeneity, calculated/measured in terms of maximum over minimum and coefficient of variation (CV) in the region of interest (ROI), are presented for both coils. A study of the RF consistency of both coils across multiple head models for different RF excitation strategies is also presented. |
| first_indexed | 2024-12-16T08:56:56Z |
| format | Article |
| id | doaj.art-939080157e3f444fbcfa5d76621b2358 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-16T08:56:56Z |
| publishDate | 2019-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-939080157e3f444fbcfa5d76621b23582022-12-21T22:37:17ZengPublic Library of Science (PLoS)PLoS ONE1932-62032019-01-01141e020966310.1371/journal.pone.0209663Computational and experimental evaluation of the Tic-Tac-Toe RF coil for 7 Tesla MRI.Narayanan KrishnamurthyTales SantiniSossena WoodJunghwan KimTiejun ZhaoHoward J AizensteinTamer S IbrahimA variety of 7 Tesla RF coil systems have been proposed to produce spin excitation (B1+ field) and MR image acquisition. Different groups have attempted to mitigate the challenges at high and ultra-high field MRI by proposing novel hardware and software solutions to obtain uniformly high spin excitation at acceptable RF absorption levels. In this study, we extensively compare the designs of two distributed-circuit based RF coils: the Tic-Tac-Toe (TTT) head coil and TEM head coil on multiple anatomically detailed head models and in-vivo. Bench measurements of s-parameters and experimental B1+ field distribution were obtained in volunteers and compared with numerical simulations. RF absorption, quantified by both average and peak SAR, and B1+ field intensity and homogeneity, calculated/measured in terms of maximum over minimum and coefficient of variation (CV) in the region of interest (ROI), are presented for both coils. A study of the RF consistency of both coils across multiple head models for different RF excitation strategies is also presented.https://doi.org/10.1371/journal.pone.0209663 |
| spellingShingle | Narayanan Krishnamurthy Tales Santini Sossena Wood Junghwan Kim Tiejun Zhao Howard J Aizenstein Tamer S Ibrahim Computational and experimental evaluation of the Tic-Tac-Toe RF coil for 7 Tesla MRI. PLoS ONE |
| title | Computational and experimental evaluation of the Tic-Tac-Toe RF coil for 7 Tesla MRI. |
| title_full | Computational and experimental evaluation of the Tic-Tac-Toe RF coil for 7 Tesla MRI. |
| title_fullStr | Computational and experimental evaluation of the Tic-Tac-Toe RF coil for 7 Tesla MRI. |
| title_full_unstemmed | Computational and experimental evaluation of the Tic-Tac-Toe RF coil for 7 Tesla MRI. |
| title_short | Computational and experimental evaluation of the Tic-Tac-Toe RF coil for 7 Tesla MRI. |
| title_sort | computational and experimental evaluation of the tic tac toe rf coil for 7 tesla mri |
| url | https://doi.org/10.1371/journal.pone.0209663 |
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