Gradient Coil Design and Realization for a Halbach-Based MRI System

Bart De Vos; Patrick Fuchs; Thomas O'Reilly; Andrew Webb; Rob Remis

doi:10.1109/TMAG.2019.2958561

Gradient Coil Design and Realization for a Halbach-Based MRI System

Bart De Vos, Patrick Fuchs^*, Thomas O'Reilly, Andrew Webb, Rob Remis

^*Corresponding author for this work

Signal Processing Systems

Research output: Contribution to journal › Article › Scientific › peer-review

16 Citations (Scopus)

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Abstract

In this article, we design and construct gradient coils for a Halbach permanent-magnet array magnetic resonance (MR) scanner. The target field method, which is widely applied for the case of axial static magnetic fields, has been developed for a transverse static magnetic field as produced by a Halbach permanent-magnet array. Using this method, current densities for three gradient directions are obtained and subsequently verified using a commercial magneto-static solver. Stream functions are used to turn the surface current densities into wire patterns for constructing the gradient coils. The measured fields are in good agreement with simulations and their prescribed target fields. 3-D images have been acquired using the constructed gradient coils with a very low degree of geometric distortion.

Original language	English
Article number	8961197
Number of pages	8
Journal	IEEE Transactions on Magnetics
Volume	56
Issue number	3
DOIs	https://doi.org/10.1109/TMAG.2019.2958561
Publication status	Published - 2020

Keywords

Gradient coils
Halbach arrays
low field
magnetic resonance imaging (MRI)
target field method

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10.1109/TMAG.2019.2958561

1912.08500Accepted author manuscript, 1.49 MB

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title = "Gradient Coil Design and Realization for a Halbach-Based MRI System",

abstract = "In this article, we design and construct gradient coils for a Halbach permanent-magnet array magnetic resonance (MR) scanner. The target field method, which is widely applied for the case of axial static magnetic fields, has been developed for a transverse static magnetic field as produced by a Halbach permanent-magnet array. Using this method, current densities for three gradient directions are obtained and subsequently verified using a commercial magneto-static solver. Stream functions are used to turn the surface current densities into wire patterns for constructing the gradient coils. The measured fields are in good agreement with simulations and their prescribed target fields. 3-D images have been acquired using the constructed gradient coils with a very low degree of geometric distortion.",

keywords = "Gradient coils, Halbach arrays, low field, magnetic resonance imaging (MRI), target field method",

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journal = "IEEE Transactions on Magnetics",

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T1 - Gradient Coil Design and Realization for a Halbach-Based MRI System

AU - De Vos, Bart

AU - Fuchs, Patrick

AU - O'Reilly, Thomas

AU - Webb, Andrew

AU - Remis, Rob

PY - 2020

Y1 - 2020

N2 - In this article, we design and construct gradient coils for a Halbach permanent-magnet array magnetic resonance (MR) scanner. The target field method, which is widely applied for the case of axial static magnetic fields, has been developed for a transverse static magnetic field as produced by a Halbach permanent-magnet array. Using this method, current densities for three gradient directions are obtained and subsequently verified using a commercial magneto-static solver. Stream functions are used to turn the surface current densities into wire patterns for constructing the gradient coils. The measured fields are in good agreement with simulations and their prescribed target fields. 3-D images have been acquired using the constructed gradient coils with a very low degree of geometric distortion.

AB - In this article, we design and construct gradient coils for a Halbach permanent-magnet array magnetic resonance (MR) scanner. The target field method, which is widely applied for the case of axial static magnetic fields, has been developed for a transverse static magnetic field as produced by a Halbach permanent-magnet array. Using this method, current densities for three gradient directions are obtained and subsequently verified using a commercial magneto-static solver. Stream functions are used to turn the surface current densities into wire patterns for constructing the gradient coils. The measured fields are in good agreement with simulations and their prescribed target fields. 3-D images have been acquired using the constructed gradient coils with a very low degree of geometric distortion.

KW - Gradient coils

KW - Halbach arrays

KW - low field

KW - magnetic resonance imaging (MRI)

KW - target field method

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DO - 10.1109/TMAG.2019.2958561

M3 - Article

SN - 0018-9464

VL - 56

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 3

M1 - 8961197

ER -

Gradient Coil Design and Realization for a Halbach-Based MRI System

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Keywords

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Electromagnetic Fields in MRI: Analytical Methods and Applications

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