|B1+| and |E| maps using the standard basis.
<p><b>(</b>A<b>)</b> Simulated normalized |B<sub>1</sub><sup>+</sup>| maps for the model of <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0316002#pone.0316002.g002" target="_blank">Fig 2</a>...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , , |
| منشور في: |
2024
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| الموضوعات: | |
| الوسوم: |
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| الملخص: | <p><b>(</b>A<b>)</b> Simulated normalized |B<sub>1</sub><sup>+</sup>| maps for the model of <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0316002#pone.0316002.g002" target="_blank">Fig 2</a>, using the standard basis (“channel coordinates”), with orange dashed lines indicating the approximate position of the active element, for coil channels CH1, CH2, CH3 and CH4. Normalization was performed with respect to the maximum |B<sub>1</sub><sup>+</sup>| observed across all four channels. The “twisted” red dashed line highlights the field asymmetry due to the elliptical field polarization effect (see text for details). <b>(</b>B<b>)</b> Corresponding simulated |E|-fields on a logarithmic scale. The 1-g local SAR at the tip of the wire is shown below each |E| map. <b>(</b>C<b>)</b> Corresponding normalized |B<sub>1</sub><sup>+</sup>| maps estimated by MRI experiment from two gradient echo images using the double angle method (DAM) with flip angles set to θ<sub>1</sub> = 20° and θ<sub>2</sub> = 60°. The measured temperature change at the wire tip during TSE MRI, ΔT, is shown below each experimental normalized |B<sub>1</sub><sup>+</sup>| map. The wire tip is indicated via white and black arrows in the |B<sub>1</sub><sup>+</sup>| and |E| maps, respectively.</p> |
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