Principles of active acoustic control in gradient coil design

2000 ◽  
Vol 10 (2) ◽  
pp. 147-151 ◽  
Author(s):  
Peter Mansfield ◽  
B. Haywood
Keyword(s):  
Gradient Coil ◽  
Coil Design ◽  
Acoustic Control ◽  
Active Acoustic Control ◽  
Gradient Coil Design

scholarly journals Acoustic Control through Gradient Coil Design Using a Finite-Difference-Based Method for MRI

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Liyi Kang ◽  
Ling Xia
Keyword(s):  
Finite Difference ◽  
Design Method ◽  
Three Dimensional ◽  
Momentum Equation ◽  
Gradient Coil ◽  
Sound Waves ◽  
Coil Design ◽  
Acoustic Control ◽  
Control Scheme ◽  
Gradient Coil Design

An acoustic control scheme is proposed in this paper through the process of gradient coil design for magnetic resonance imaging (MRI). With a finite-difference-based method, the stream function and coil displacement caused by fast gradient switching can be unified by a simplified momentum equation, which can be incorporated into the conventional gradient coil design. A three-dimensional transverse gradient coil with an edge-connected cylindrical structure is used as a design example to verify the proposed design method. In addition, an acoustic model is established to simulate the sound pressure level (SPL).In the model, two hemispherical air volumes are added flush with the ends of the cylindrical main magnet to mimic the free propagation of sound waves on the boundaries. The simulation results show that by optimizing coil displacement, the overall SPL can be attenuated by 4 dB over the frequency range from 0 to 3000 Hz with the displacement reduced by about 50%, at the cost of a figure of merit (FOM) loss by about 8%. Therefore, the proposed acoustic control scheme can be used as a complement to conventional acoustic control methods for further noise reduction.

A Method for Reducing Secondary Field Effects in Asymmetric MRI Gradient Coil Design

2016 ◽  
Vol 63 (5) ◽  
pp. 924-932 ◽  
Author(s):  
Elliot Smith ◽  
Fabio Freschi ◽  
Maurizio Repetto ◽  
Stuart Crozier
Keyword(s):  
Gradient Coil ◽  
Coil Design ◽  
Secondary Field ◽  
Field Effects ◽  
Gradient Coil Design

A hybrid optimization method for biplanar transverse gradient coil design

2007 ◽  
Vol 40 (9) ◽  
pp. 2988-2993 ◽  
Author(s):  
Qi Feng ◽  
Tang Xin ◽  
Jin Zhe ◽  
Jiang Zhongde ◽  
Shen Yifei ◽  
...  
Keyword(s):  
Optimization Method ◽  
Hybrid Optimization ◽  
Gradient Coil ◽  
Coil Design ◽  
Hybrid Optimization Method ◽  
Transverse Gradient ◽  
Gradient Coil Design

scholarly journals Minimum maximum temperature gradient coil design

2012 ◽  
Vol 70 (2) ◽  
pp. 584-594 ◽  
Author(s):  
Peter T. While ◽  
Michael S. Poole ◽  
Larry K. Forbes ◽  
Stuart Crozier
Keyword(s):  
Temperature Gradient ◽  
Gradient Coil ◽  
Maximum Temperature ◽  
Coil Design ◽  
Gradient Coil Design ◽  
Maximum Temperature Gradient

3D Gradient coil design – Toroidal surfaces

2009 ◽  
Vol 198 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Peter T. While ◽  
Larry K. Forbes ◽  
Stuart Crozier
Keyword(s):  
Gradient Coil ◽  
Coil Design ◽  
Gradient Coil Design

Practical aspects of shielded gradient-coil design for localised in vivo NMR spectroscopy and small-scale imaging

1994 ◽  
Vol 12 (4) ◽  
pp. 621-630 ◽  
Author(s):  
Craig D. Eccles ◽  
Stuart Crozier ◽  
Wolfgang Roffman ◽  
David M. Doddrell ◽  
Philip Back ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Gradient Coil ◽  
Small Scale ◽  
Coil Design ◽  
In Vivo Nmr ◽  
In Vivo Nmr Spectroscopy ◽  
Gradient Coil Design
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