Numerical study of RF magnetic field, specific absorption rate and signal to noise ratio in high field MRI

2006 ◽  
Author(s):  
Chunsheng Wang
Keyword(s):  
Magnetic Field ◽  
High Field ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Numerical Study ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
High Field Mri ◽  
Specific Absorption ◽  
Rf Magnetic Field

Computer-Vision Techniques for Water-Fat Separation in Ultra High-Field MRI Local Specific Absorption Rate Estimation

2019 ◽  
Vol 66 (3) ◽  
pp. 768-774
Author(s):  
Angel Torrado-Carvajal ◽  
Yigitcan Eryaman ◽  
Esra Abaci Turk ◽  
Joaquin L. Herraiz ◽  
Juan A. Hernandez-Tamames ◽  
...  
Keyword(s):  
Computer Vision ◽  
High Field ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Ultra High Field ◽  
High Field Mri ◽  
Specific Absorption ◽  
Rate Estimation ◽  
Ultra High Field Mri

scholarly journals Improving radiofrequency power and specific absorption rate management with bumped transmit elements in ultra‐high field MRI

2020 ◽  
Vol 84 (6) ◽  
pp. 3485-3493 ◽  
Author(s):  
Alireza Sadeghi‐Tarakameh ◽  
Gregor Adriany ◽  
Gregory J. Metzger ◽  
Russell L. Lagore ◽  
Steve Jungst ◽  
...  
Keyword(s):  
High Field ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Ultra High Field ◽  
High Field Mri ◽  
Specific Absorption ◽  
Ultra High Field Mri

scholarly journals Effect of radiofrequency shield diameter on signal‐to‐noise ratio at ultra‐high field MRI

2021 ◽  
Vol 85 (6) ◽  
pp. 3522-3530
Author(s):  
Bei Zhang ◽  
Gregor Adriany ◽  
Lance Delabarre ◽  
Jerahmie Radder ◽  
Russell Lagore ◽  
...  
Keyword(s):  
High Field ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Ultra High Field ◽  
High Field Mri ◽  
Ultra High Field Mri ◽  
Noise Ratio

scholarly journals High-Field Pulsed ENDOR with Intra-cavity Radiofrequency Coil

2020 ◽  
Vol 51 (11) ◽  
pp. 1433-1449
Author(s):  
G. Annino ◽  
H. Moons ◽  
M. Fittipaldi ◽  
S. Van Doorslaer ◽  
E. Goovaerts
Keyword(s):  
Magnetic Field ◽  
High Field ◽  
Conversion Factor ◽  
Signal To Noise Ratio ◽  
Model Systems ◽  
Signal To Noise ◽  
Radiofrequency Coil ◽  
W Band ◽  
Radiofrequency Current ◽  
Field Uniformity

AbstractThis study compares the performance of two coil configurations for W-band pulsed ENDOR using a setup with both a radiofrequency ‘hairpin’ coil internal to a microwave non-radiative resonator and Helmholtz-like coils external to the resonator. Evaluation of the different coil performances is achieved via the ENDOR study of two model systems. The efficiencies of the coil configurations are first investigated numerically, showing that a higher radiofrequency current-to-magnetic field conversion factor can be achieved with the intra-cavity coil, with a similar radiofrequency magnetic field uniformity. This result is then confirmed by the broadband ENDOR spectra acquired with the two coil arrangements. A gain in the signal-to-noise ratio enabled by the internal coil of about a factor 10 was observed. In some cases, the high conversion factor of the intra-cavity coil led to a saturation of the ENDOR transitions. The possibility to implement a similar intra-cavity radiofrequency coil configuration in higher field spectrometers is finally discussed.

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