MAGNETIC STRUCTURE IN PERMANENT MAGNET FOR MRI AND MAGNETIC FILED GENERATION DEVICE THEREOF

摘要

PURPOSE: Magnetic structure in a permanent magnet for MRI is provided which configures a lattice-style groove with deeper depth than skin depth on surface to block a channel, in which eddy current is flown by slide magnetic field pulse so that it reduces the amount of eddy current. CONSTITUTION: In the magnetic structure of the permanent magnet for MRI which is placed to the front face of the permanent magnet to control direction of magnetic field emitted from the permanent magnet, the magnetic structure is characterized by forming a groove with deeper depth than a depth which is made by the permeation of slide magnetic field pulse in MRI on the surface of a conductive plate member to divide the surface into multiple domains.