Multislice B1 Mapping Method Using Magnetic Resonance Composite Spin Echo Sequences and Simultaneous Echo Refocusing
Radiofrequency (RF) transmit field (B1) mapping is a promising method in mitigating the B1 inhomogeneity in various magnetic resonance imaging (MRI) applications. Although several phase- or magnitude-based B1 mapping methods have been proposed, these methods often require complex modeling, long acqu...
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | Concepts in Magnetic Resonance: Part A, Bridging Education and Research |
| Online Access: | http://dx.doi.org/10.1155/2023/7642095 |
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| author | Suchit Kumar Kyu Chan Lee Jong-Min Kim Jeung-Hoon Seo Chulhyun Lee Chang-Hyun Oh |
| author_facet | Suchit Kumar Kyu Chan Lee Jong-Min Kim Jeung-Hoon Seo Chulhyun Lee Chang-Hyun Oh |
| author_sort | Suchit Kumar |
| collection | DOAJ |
| description | Radiofrequency (RF) transmit field (B1) mapping is a promising method in mitigating the B1 inhomogeneity in various magnetic resonance imaging (MRI) applications. Although several phase- or magnitude-based B1 mapping methods have been proposed, these methods often require complex modeling, long acquisition time, or specialized MRI sequences. A recently introduced simultaneous echo refocusing (SER) technique can be applied in the B1 mapping method to extend the three-dimensional (3D) spatial coverage only without long data acquisition. Therefore, in this study, a multislice B1 mapping method using composite spin echo sequences and SER techniques is proposed to obtain more accurate B1 mapping with short data acquisition time. To evaluate the performance of the proposed B1 mapping method, computational simulations were performed and compared with Morrell’s method, double angle method, and Yarnykh’s method. These results showed that the angle-to-noise ratio of the proposed B1 mapping method has wider B1 range compared to that of other B1 mapping methods. In addition, the proposed B1 mapping methods were compared to the multislice iterative signal intensity mapping method in both phantom and in vivo human experiments, and there was no remarkable difference between the two methods regarding the flip angle distribution in these experiments. Based on these results, this study demonstrated that the proposed B1 mapping method is suitable for accurately measuring B1 propagation under the condition providing reduced scan time and wider 3D coverage of B1 mapping by applying composite RF pulse and SER techniques into the phase-sensitive method. |
| format | Article |
| id | doaj-art-c1bfd51d90d04bbcac7ad0b5bbdd8f99 |
| institution | Kabale University |
| issn | 1552-5023 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Concepts in Magnetic Resonance: Part A, Bridging Education and Research |
| spelling | doaj-art-c1bfd51d90d04bbcac7ad0b5bbdd8f992025-02-03T06:47:16ZengWileyConcepts in Magnetic Resonance: Part A, Bridging Education and Research1552-50232023-01-01202310.1155/2023/7642095Multislice B1 Mapping Method Using Magnetic Resonance Composite Spin Echo Sequences and Simultaneous Echo RefocusingSuchit Kumar0Kyu Chan Lee1Jong-Min Kim2Jeung-Hoon Seo3Chulhyun Lee4Chang-Hyun Oh5Research Institute for Advanced Industrial TechnologyDepartment of Radiation OncologyResearch Institute for Advanced Industrial TechnologyNeuroscience Research InstituteBioimaging Research TeamResearch Institute for Advanced Industrial TechnologyRadiofrequency (RF) transmit field (B1) mapping is a promising method in mitigating the B1 inhomogeneity in various magnetic resonance imaging (MRI) applications. Although several phase- or magnitude-based B1 mapping methods have been proposed, these methods often require complex modeling, long acquisition time, or specialized MRI sequences. A recently introduced simultaneous echo refocusing (SER) technique can be applied in the B1 mapping method to extend the three-dimensional (3D) spatial coverage only without long data acquisition. Therefore, in this study, a multislice B1 mapping method using composite spin echo sequences and SER techniques is proposed to obtain more accurate B1 mapping with short data acquisition time. To evaluate the performance of the proposed B1 mapping method, computational simulations were performed and compared with Morrell’s method, double angle method, and Yarnykh’s method. These results showed that the angle-to-noise ratio of the proposed B1 mapping method has wider B1 range compared to that of other B1 mapping methods. In addition, the proposed B1 mapping methods were compared to the multislice iterative signal intensity mapping method in both phantom and in vivo human experiments, and there was no remarkable difference between the two methods regarding the flip angle distribution in these experiments. Based on these results, this study demonstrated that the proposed B1 mapping method is suitable for accurately measuring B1 propagation under the condition providing reduced scan time and wider 3D coverage of B1 mapping by applying composite RF pulse and SER techniques into the phase-sensitive method.http://dx.doi.org/10.1155/2023/7642095 |
| spellingShingle | Suchit Kumar Kyu Chan Lee Jong-Min Kim Jeung-Hoon Seo Chulhyun Lee Chang-Hyun Oh Multislice B1 Mapping Method Using Magnetic Resonance Composite Spin Echo Sequences and Simultaneous Echo Refocusing Concepts in Magnetic Resonance: Part A, Bridging Education and Research |
| title | Multislice B1 Mapping Method Using Magnetic Resonance Composite Spin Echo Sequences and Simultaneous Echo Refocusing |
| title_full | Multislice B1 Mapping Method Using Magnetic Resonance Composite Spin Echo Sequences and Simultaneous Echo Refocusing |
| title_fullStr | Multislice B1 Mapping Method Using Magnetic Resonance Composite Spin Echo Sequences and Simultaneous Echo Refocusing |
| title_full_unstemmed | Multislice B1 Mapping Method Using Magnetic Resonance Composite Spin Echo Sequences and Simultaneous Echo Refocusing |
| title_short | Multislice B1 Mapping Method Using Magnetic Resonance Composite Spin Echo Sequences and Simultaneous Echo Refocusing |
| title_sort | multislice b1 mapping method using magnetic resonance composite spin echo sequences and simultaneous echo refocusing |
| url | http://dx.doi.org/10.1155/2023/7642095 |
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