Magnetoinductive metasurface of capacitively-loaded split rings for local field homogenization in a 7 T MRI birdcage : A simulation study
Copyright © 2023 Elsevier Inc. All rights reserved..
The transmit field B1+ in a 7 T birdcage is inherently inhomogeneous due to the effects of wavelengths on tissue. This work investigates the homogenization of this field through metasurfaces that consist of a two-dimensional planar array of capacitively loaded conducting rings. The metasurfaces are placed in the intermediate space between the head and the birdcage on either side of the head. The periodical structure of this type of metasurface supports magnetoinductive waves because of the mutual inductive coupling existing between the elements of the array. The analysis takes advantage of this coupling and exploits the excitation of a standing magnetoinductive wave across the arrays, which creates a strong local field that contributes to locally homogenize the field of the birdcage. The presence of the arrays does not detune the birdcage, so that they can be used with commercial birdcages that operate both to transmit and to receive.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2023 |
|---|---|
| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:357 |
|---|---|
| Enthalten in: |
Journal of magnetic resonance (San Diego, Calif. : 1997) - 357(2023) vom: 01. Dez., Seite 107586 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Freire, Manuel J [VerfasserIn] |
|---|
| Links: |
|---|
| Themen: |
Birdcage coil |
|---|
| Anmerkungen: |
Date Revised 09.12.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
|---|
| doi: |
10.1016/j.jmr.2023.107586 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM364361379 |
|---|
| LEADER | 01000caa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM364361379 | ||
| 003 | DE-627 | ||
| 005 | 20231227131931.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231226s2023 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1016/j.jmr.2023.107586 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n1226.xml |
| 035 | |a (DE-627)NLM364361379 | ||
| 035 | |a (NLM)37944423 | ||
| 035 | |a (PII)S1090-7807(23)00221-5 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Freire, Manuel J |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Magnetoinductive metasurface of capacitively-loaded split rings for local field homogenization in a 7 T MRI birdcage |b A simulation study |
| 264 | 1 | |c 2023 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Revised 09.12.2023 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Copyright © 2023 Elsevier Inc. All rights reserved. | ||
| 520 | |a The transmit field B1+ in a 7 T birdcage is inherently inhomogeneous due to the effects of wavelengths on tissue. This work investigates the homogenization of this field through metasurfaces that consist of a two-dimensional planar array of capacitively loaded conducting rings. The metasurfaces are placed in the intermediate space between the head and the birdcage on either side of the head. The periodical structure of this type of metasurface supports magnetoinductive waves because of the mutual inductive coupling existing between the elements of the array. The analysis takes advantage of this coupling and exploits the excitation of a standing magnetoinductive wave across the arrays, which creates a strong local field that contributes to locally homogenize the field of the birdcage. The presence of the arrays does not detune the birdcage, so that they can be used with commercial birdcages that operate both to transmit and to receive | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Birdcage coil | |
| 650 | 4 | |a Field homogenization | |
| 650 | 4 | |a Magnetic resonance imaging | |
| 650 | 4 | |a Metamaterials | |
| 700 | 1 | |a Marqués, Ricardo |e verfasserin |4 aut | |
| 700 | 1 | |a Tornero, Jesús |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of magnetic resonance (San Diego, Calif. : 1997) |d 1998 |g 357(2023) vom: 01. Dez., Seite 107586 |w (DE-627)NLM091000068 |x 1096-0856 |7 nnns |
| 773 | 1 | 8 | |g volume:357 |g year:2023 |g day:01 |g month:12 |g pages:107586 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1016/j.jmr.2023.107586 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 357 |j 2023 |b 01 |c 12 |h 107586 | ||