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Research of Magnetic and Electric Fields to Design and Develop the Prototype of Magnetic Resonance Imaging Device
Author(s)
Chompoo-Inwai, Chai
Suksathit, Witchayaphorn
Kaewpromrat, Weerapat
Maneerat, Saranyu
Date Issued
January 1, 2025
Type
Conference Paper
Abstract
This research presents a study and preliminary design of a main magnetic field generation system for an MRI machine using simulation software. The objective is to investigate the factors affecting magnetic field strength. Six coil models were preliminarily designed and simulated to analyze the magnetic field behavior. Simulation results were compared with experimental magnetic field measurements, showing that the software accurately reproduces the magnetic field. It was found that distributed winding improves field uniformity, and that both the number of coil turns and conductor size directly affect the strength of the main magnetic field in the air core.Based on the simulation outcomes, a prototype magnetic field generation system was designed. The proposed prototype consists of an aluminum core with a diameter of 110 mm and a height of 335 mm, suitable for arm imaging. The system uses a superconducting NbTi wire wound 6,516 turns in eight segments, with a current of 120 A. Cooling is achieved using a cryocooler model RDE-418D4 4K, which can reach temperatures as low as 4.2 K. This study provides essential guidance for the development of main magnetic field systems in future MRI devices.
Citation
2025 7th International Conference on Power Energy and Innovations Icpei 2025 Proceedings, 2025