ORIGINAL RESEARCH article
Front. Phys.
Sec. Medical Physics and Imaging
Volume 13 - 2025 | doi: 10.3389/fphy.2025.1579043
Design Method of Magnetic Resonance Biplanar Gradient Coil Based on Target Field Method and Stream Function
Provisionally accepted
- 1University of Shanghai for Science and Technology, Shanghai, Shanghai Municipality, China
- 2Shanghai University of Medicine and Health Sciences, Shanghai, China
- 3Shanghai General Hospital, Shanghai, China
- 4Shanghai Tenth People's Hospital, Tongji University, Shanghai, Shanghai Municipality, China
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The gradient coil is a crucial component of the magnetic resonance imaging (MRI) system, responsible for generating linear gradient magnetic fields to facilitate spatial positioning for image reconstruction. This article combines a new target field point method and stream function with classical electromagnetism theory to design a Biplanar gradient coil. According to the demand of magnetic field strength of the gradient coil, the winding distribution characteristics of the coil are obtained by inverse simulation using numerical calculation tools. Then, a solid gradient coil model is established using electromagnetic field simulation software. The corresponding gradient magnetic field strengths are individually obtained by orthogonal analysis for the transverse gradient coil 𝑥, 𝑦, and the longitudinal gradient coil 𝑧. The gradient coil's winding pattern is iteratively modified and optimised based on the magnetic field strength distribution. The optimisation process targets several key parameters, including gradient linearity, coil efficiency, and the uniformity of the magnetic field within the desired spherical volume (DSV). After optimisation, a prototype of the dual-plane gradient coil is fabricated and evaluated to verify its performance against theoretical expectations. The experiments show that the Biplanar gradient coil has high linearity and fast gradient switching time, and the image resolution and signal-to-noise ratio of magnetic resonance imaging is improved, which lays the foundation for high-end clinical applications such as rapid magnetic resonance imaging.
Keywords: target field method, Streaming Function, inverse simulation, Forward calculation, gradient coil
Received: 18 Feb 2025; Accepted: 12 May 2025.
Copyright: © 2025 Huang, Huang, Zhang, Huang, Wang and Shen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Bing Shen, University of Shanghai for Science and Technology, Shanghai, 130012, Shanghai Municipality, China
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