Robust and fast whole brain mapping of the RF transmit field B1 at 7T.
In-vivo whole brain mapping of the radio frequency transmit field B(1) (+) is a key aspect of recent method developments in ultra high field MRI. We present an optimized method for fast and robust in-vivo whole-brain B(1) (+) mapping at 7T. The method is based on the acquisition of stimulated and sp...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2012-01-01
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| Series: | PLoS ONE |
| Online Access: | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0032379&type=printable |
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| author | Antoine Lutti Joerg Stadler Oliver Josephs Christian Windischberger Oliver Speck Johannes Bernarding Chloe Hutton Nikolaus Weiskopf |
| author_facet | Antoine Lutti Joerg Stadler Oliver Josephs Christian Windischberger Oliver Speck Johannes Bernarding Chloe Hutton Nikolaus Weiskopf |
| author_sort | Antoine Lutti |
| collection | DOAJ |
| description | In-vivo whole brain mapping of the radio frequency transmit field B(1) (+) is a key aspect of recent method developments in ultra high field MRI. We present an optimized method for fast and robust in-vivo whole-brain B(1) (+) mapping at 7T. The method is based on the acquisition of stimulated and spin echo 3D EPI images and was originally developed at 3T. We further optimized the method for use at 7T. Our optimization significantly improved the robustness of the method against large B(1) (+) deviations and off-resonance effects present at 7T. The mean accuracy and precision of the optimized method across the brain was high with a bias less than 2.6 percent unit (p.u.) and random error less than 0.7 p.u. respectively. |
| format | Article |
| id | doaj-art-c6af098a7cba4f0c895a88c527347c35 |
| institution | DOAJ |
| issn | 1932-6203 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj-art-c6af098a7cba4f0c895a88c527347c352025-08-20T03:10:22ZengPublic Library of Science (PLoS)PLoS ONE1932-62032012-01-0173e3237910.1371/journal.pone.0032379Robust and fast whole brain mapping of the RF transmit field B1 at 7T.Antoine LuttiJoerg StadlerOliver JosephsChristian WindischbergerOliver SpeckJohannes BernardingChloe HuttonNikolaus WeiskopfIn-vivo whole brain mapping of the radio frequency transmit field B(1) (+) is a key aspect of recent method developments in ultra high field MRI. We present an optimized method for fast and robust in-vivo whole-brain B(1) (+) mapping at 7T. The method is based on the acquisition of stimulated and spin echo 3D EPI images and was originally developed at 3T. We further optimized the method for use at 7T. Our optimization significantly improved the robustness of the method against large B(1) (+) deviations and off-resonance effects present at 7T. The mean accuracy and precision of the optimized method across the brain was high with a bias less than 2.6 percent unit (p.u.) and random error less than 0.7 p.u. respectively.https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0032379&type=printable |
| spellingShingle | Antoine Lutti Joerg Stadler Oliver Josephs Christian Windischberger Oliver Speck Johannes Bernarding Chloe Hutton Nikolaus Weiskopf Robust and fast whole brain mapping of the RF transmit field B1 at 7T. PLoS ONE |
| title | Robust and fast whole brain mapping of the RF transmit field B1 at 7T. |
| title_full | Robust and fast whole brain mapping of the RF transmit field B1 at 7T. |
| title_fullStr | Robust and fast whole brain mapping of the RF transmit field B1 at 7T. |
| title_full_unstemmed | Robust and fast whole brain mapping of the RF transmit field B1 at 7T. |
| title_short | Robust and fast whole brain mapping of the RF transmit field B1 at 7T. |
| title_sort | robust and fast whole brain mapping of the rf transmit field b1 at 7t |
| url | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0032379&type=printable |
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