Magnetic resonance imaging method and apparatus capable of compensating for disturbed gradient field caused by eddy current

摘要

In an MR (magnetic resonance) imaging method, not only eddy current field is compensated, but also a gradient field vibrated by a mechanical vibration caused by the eddy current is compensated. The method for imaging a biological body under medical examination by utilizing a magnetic resonance phenomenon under influence of a static magnetic field and a gradient magnetic field to acquire an MR image of a preselected slice portion within the biological body, comprising the steps of: producing a first drive current on which an eddy current field compensating current has been superimposed: producing a vibrating-field compensating current for compensating a gradient field vibrated by the eddy current; and superimposing the vibrating-field compensating current on the first drive current to obtain a second drive current. The second drive current is supplied to a gradient coil assembly for generating a gradient field whose vibrating field component has been compensated.