TY  - JOUR
AU  - Aigner, Christoph S
AU  - Sánchez Alarcon, Manuel F
AU  - D'Astous, Alexandre
AU  - Alonso-Ortiz, Eva
AU  - Cohen-Adad, Julien
AU  - Schmitter, Sebastian
TI  - Calibration-free parallel transmission of the cervical, thoracic, and lumbar spinal cord at 7T.
JO  - Magnetic resonance in medicine
VL  - 92
IS  - 4
SN  - 1522-2594
CY  - New York, NY [u.a.]
PB  - Wiley-Liss
M1  - DKFZ-2024-01008
SP  - 1496-1510
PY  - 2024
N1  - #LA:E020# / 2024 Oct;92(4):1496-1510
AB  - To address the limitations of spinal cord imaging at ultra-high field (UHF) due to time-consuming parallel transmit (pTx) adjustments. This study introduces calibration-free offline computed universal shim modes that can be applied seamlessly for different pTx RF coils and spinal cord target regions, substantially enhancing spinal cord imaging efficiency at UHF.A library of channel-wise relative B 1 + 
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AB  -  B<sub>1</sub><sup>+</sup> </td></tr></table>
AB  - </td></tr></table>
AB  - 
AB  -  maps for the cervical spinal cord (six datasets) and thoracic and lumbar spinal cord (nine datasets) was constructed to optimize transmit homogeneity and efficiency for these regions. A tailored B0 shim was optimized for the cervical spine to enhance spatial magnetic field homogeneity further. The performance of the universal shims was validated using absolute saturation based B 1 + 
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AB  -  B<sub>1</sub><sup>+</sup> </td></tr></table>
AB  - </td></tr></table>
AB  - 
AB  -  mapping and high-resolution 2D and 3D multi-echo gradient-recalled echo (GRE) data to assess the image quality.The proposed universal shims demonstrated a 50
KW  - 7 Tesla (Other)
KW  - calibration‐free (Other)
KW  - parallel transmission (Other)
KW  - spinal cord (Other)
KW  - universal pulse (Other)
LB  - PUB:(DE-HGF)16
C6  - pmid:38733068
DO  - DOI:10.1002/mrm.30137
UR  - https://inrepo02.dkfz.de/record/290172
ER  -