Display options
Cite
McGinley JV, Ristic M, Young IR. A permanent MRI magnet for magic angle imaging having its field parallel to the poles. J Magn Reson. 2016;271:60-7doi: 10.1016/j.jmr.2016.08.001.
McGinley, J. V., Ristic, M., & Young, I. R. (2016). A permanent MRI magnet for magic angle imaging having its field parallel to the poles. Journal of magnetic resonance (San Diego, Calif. : 1997), 27160-7. https://doi.org/10.1016/j.jmr.2016.08.001
McGinley, John V M, et al. "A permanent MRI magnet for magic angle imaging having its field parallel to the poles." Journal of magnetic resonance (San Diego, Calif. : 1997) vol. 271 (2016): 60-7. doi: https://doi.org/10.1016/j.jmr.2016.08.001
McGinley JV, Ristic M, Young IR. A permanent MRI magnet for magic angle imaging having its field parallel to the poles. J Magn Reson. 2016 Oct;271:60-7. doi: 10.1016/j.jmr.2016.08.001. Epub 2016 Aug 08. PMID: 27552556.
Copy Download .nbib Format: NLM
Share it on

J Magn Reson. 2016 Oct;271:60-7. doi: 10.1016/j.jmr.2016.08.001. Epub 2016 Aug 08.

A permanent MRI magnet for magic angle imaging having its field parallel to the poles.

Journal of magnetic resonance (San Diego, Calif. : 1997)

John V M McGinley, Mihailo Ristic, Ian R Young

Affiliations

  1. Imperial College London, Mechanical Engineering Department, South Kensington Campus, Exhibition Road, London SW7 2AZ, United Kingdom.
  2. Imperial College London, Mechanical Engineering Department, South Kensington Campus, Exhibition Road, London SW7 2AZ, United Kingdom. Electronic address: [email protected].

PMID: 27552556 DOI: 10.1016/j.jmr.2016.08.001

Abstract

A novel design of open permanent magnet is presented, in which the magnetic field is oriented parallel to the planes of its poles. The paper describes the methods whereby such a magnet can be designed with a field homogeneity suitable for Magnetic Resonance Imaging (MRI). Its primary purpose is to take advantage of the Magic Angle effect in MRI of human extremities, particularly the knee joint, by being capable of rotating the direction of the main magnetic field B0 about two orthogonal axes around a stationary subject and achieve all possible angulations. The magnet comprises a parallel pair of identical profiled arrays of permanent magnets backed by a flat steel yoke such that access in lateral directions is practical. The paper describes the detailed optimization procedure from a target 150mm DSV to the achievement of a measured uniform field over a 130mm DSV. Actual performance data of the manufactured magnet, including shimming and a sample image, is presented. The overall magnet system mounting mechanism is presented, including two orthogonal axes of rotation of the magnet about its isocentre.

Copyright © 2016 Elsevier Inc. All rights reserved.

Keywords: Magic angle imaging; Magnet design; Magnetic Resonance Imaging (MRI); Permanent magnet

Publication Types

Grant support