MAGNET SYSTEM AND MRI APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a magnet system having excellent use efficiency of magnetic energy of a permanent magnet, and an MRI apparatus including such a magnet system. SOLUTION: A magnet system (100) has a pair of parallel plate-like permanent magnets in which magnetic poles of reversed polarities are opposed to each other with a space therebetween. The pair of permanent magnets (102) includes main portions (310) magnetized in the same direction as their thickness direction, and peripheral portions magnetized in a direction different from their thickness direction. The peripheral portions are border portions (330) of the magnetic poles on the side where the pair of permanent magnets are opposed to each other, and the peripheral portions are side circumference portions (320) of the pair of permanent magnets. COPYRIGHT: (C)2009,JPO&INPIT