Miniaturization Of The Design Of Mri Permanent Magnet System

There are many projects of magnet design in the nuclear magnetic resonance. But if applied both small and lightweight, even large areas,good stability, we face a series of problems. These problems mainly rely on the calculation of electromagnetic fields. These questions were elaborated in the paper, and then optimized the analysis of the programme, to identify the best solution. The uniform regional magnetic field established in the external side of magnet is a brand-new question which the magnet design faces. The feasibility of magnetic miniaturization design was explored by a counter mixed numerical algorithm. Numerical algorithm is one two steps of algorithms, including direct matrix inversion for counting and secondary planning. The details of this numerical algorithm ,which was used to find a more successful combination of magnetic pieces unilateral permanent magnetism magnetic structures ,were described in the paper. Software simulation models by Maxwell 3D/2D and measurements show that the structure can be better applied in establishment of magnetic field area in the external side of magnet. Thus we can lay the ground work for miniaturization unilateral homogeneous field of conventional magnetic resonance imaging system.