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

De Vos, Bart; Fuchs, P.S.; O'Reilly, Thomas; Webb, A.; Remis, R.F.

doi:10.1109/TMAG.2019.2958561

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

Title

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

Author

De Vos, Bart (Student TU Delft)
Fuchs, P.S. (TU Delft Signal Processing Systems)
O'Reilly, Thomas (Leiden University Medical Center)
Webb, A. (TU Delft Signal Processing Systems)
Remis, R.F. (TU Delft Signal Processing Systems)

Date

2020

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.

Subject

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

To reference this document use:

http://resolver.tudelft.nl/uuid:07a2be0d-8a4e-4ef5-9548-f2f38302b0e2

DOI

https://doi.org/10.1109/TMAG.2019.2958561

ISSN

0018-9464

Source

IEEE Transactions on Magnetics, 56 (3)

Part of collection

Institutional Repository