A portable, low-cost, 3D-printed main magnetic field system for magnetic imaging
In this paper, a portable, low-cost, 3D-printed system for main magnetic field is proposed to suggest a solution for accessibility problems of current magnetic imaging systems, e.g. MRI scanner, their size and cost. The system consists of twelve pairs of NdFeB N35 permanent magnets arranged in a Halbach array in a 3D-printed, cylindrical container based on FEM simulation results by COMSOL Multiphysics 4.4b. Its magnetic field homogeneity and field strength were measured by Hall sensors, WSH-135 XPAN2 by Wilson Semiconductor, and the container was printed by 3DISON H700 by Rokit. The system generated a 5-mm imaging quality FOV and main magnetic field of 120 mT with a 12 % error in the field strength. Also, a hundred dollar was enough for the manufacture of the system with a radius of 6 cm and height of 10 cm. Given the results, I believe the system will be useful for some magnetic imaging applications, e.g. EPRI and low-field MRI.
3D-printed container 3D-printed main magnetic field system biomedical equipment biomedical MRI boron alloys COMSOL Multiphysics 4.4b Containers cylindrical container EPRI FEM simulation field strength finite element analysis Halbach array Hall sensors imaging quality FOV iron alloys Korea low-field MRI magnetic field homogeneity Magnetic field measurement Magnetic fields magnetic flux density 120 mT magnetic imaging systems Magnetic resonance imaging Magnetics Magnets MRI scanner NdFeB NdFeB N35 permanent magnets neodymium alloys Permanent magnets radius 6 cm Rokit Sensitivity Seoul National University size 10 cm three-dimensional printing Wilson Semiconductor WSH-135 XPAN2