scholarly journals Analytic expressions for the ultimate intrinsic signal-to-noise ratio and ultimate intrinsic specific absorption rate in MRI

2011 ◽  
Vol 66 (3) ◽  
pp. 846-858 ◽  
Author(s):  
E. Kopanoglu ◽  
V. B. Erturk ◽  
E. Atalar
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Specific Absorption ◽  
Intrinsic Signal ◽  
Analytic Expressions ◽  
Noise Ratio

scholarly journals The Intrinsic Signal-to-Noise Ratio in Human Cardiac Imaging at 1.5, 3, and 4 T

1997 ◽  
Vol 125 (1) ◽  
pp. 65-71 ◽  
Author(s):  
H. Wen ◽  
T.J. Denison ◽  
R.W. Singerman ◽  
R.S. Balaban
Keyword(s):  
Cardiac Imaging ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Intrinsic Signal ◽  
Noise Ratio

Ultimate intrinsic signal-to-noise ratio in MRI

1998 ◽  
Vol 39 (3) ◽  
pp. 462-473 ◽  
Author(s):  
Ogan Ocali ◽  
Ergin Atalar
Keyword(s):  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Intrinsic Signal ◽  
Noise Ratio

The intrinsic signal-to-noise ratio in NMR imaging

1986 ◽  
Vol 3 (4) ◽  
pp. 604-618 ◽  
Author(s):  
W. A. Edelstein ◽  
G. H. Glover ◽  
C. J. Hardy ◽  
R. W. Redington
Keyword(s):  
Signal To Noise Ratio ◽  
Nmr Imaging ◽  
Signal To Noise ◽  
Intrinsic Signal ◽  
Noise Ratio

scholarly journals Towards an integrated neonatal brain and cardiac examination capability at 7 T: electromagnetic field simulations and early phantom experiments using an 8-channel dipole array

2022 ◽  
Author(s):  
Jérémie Clément ◽  
Raphaël Tomi-Tricot ◽  
Shaihan J. Malik ◽  
Andrew Webb ◽  
Joseph V. Hajnal ◽  
...  
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Signal To Noise Ratio ◽  
Birdcage Coil ◽  
Rf Coil ◽  
Neonatal Brain ◽  
Specific Absorption ◽  
Safe Operating ◽  
Phantom Experiments ◽  
Rf Performances

Abstract Objective Neonatal brain and cardiac imaging would benefit from the increased signal-to-noise ratio levels at 7 T compared to lower field. Optimal performance might be achieved using purpose designed RF coil arrays. In this study, we introduce an 8-channel dipole array and investigate, using simulations, its RF performances for neonatal applications at 7 T. Methods The 8-channel dipole array was designed and evaluated for neonatal brain/cardiac configurations in terms of SAR efficiency (ratio between transmit-field and maximum specific-absorption-rate level) using adjusted dielectric properties for neonate. A birdcage coil operating in circularly polarized mode was simulated for comparison. Validation of the simulation model was performed on phantom for the coil array. Results The 8-channel dipole array demonstrated up to 46% higher SAR efficiency levels compared to the birdcage coil in neonatal configurations, as the specific-absorption-rate levels were alleviated. An averaged normalized root-mean-square-error of 6.7% was found between measured and simulated transmit field maps on phantom. Conclusion The 8-channel dipole array design integrated for neonatal brain and cardiac MR was successfully demonstrated, in simulation with coverage of the baby and increased SAR efficiency levels compared to the birdcage. We conclude that the 8Tx-dipole array promises safe operating procedures for MR imaging of neonatal brain and heart at 7 T.

Measurement of the intrinsic signal‐to‐noise ratio for high‐performance rigid recording media

1986 ◽  
Vol 59 (2) ◽  
pp. 557-563 ◽  
Author(s):  
Nathan R. Belk ◽  
Peter K. George ◽  
Greg S. Mowry
Keyword(s):  
High Performance ◽  
Signal To Noise Ratio ◽  
Recording Media ◽  
Signal To Noise ◽  
Intrinsic Signal ◽  
Noise Ratio

scholarly journals Ultimate intrinsic signal-to-noise ratio for parallel MRI: Electromagnetic field considerations

2003 ◽  
Vol 50 (5) ◽  
pp. 1018-1030 ◽  
Author(s):  
Michael A. Ohliger ◽  
Aaron K. Grant ◽  
Daniel K. Sodickson
Keyword(s):  
Electromagnetic Field ◽  
Signal To Noise Ratio ◽  
Parallel Mri ◽  
Signal To Noise ◽  
Intrinsic Signal ◽  
Noise Ratio
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