Patent ID: 6707302
Filing Date: 2004-03-16
Classification: G01R

Abstract:
A magnetic resonance apparatus comprising:a basic field magnet having an inner unit, an outer unit and a middle unit each being formed as a hollow cylinder having an inner cylindrical jacket, and each being electrically conductive, said inner unit being enveloped by said middle unit and said middle unit being enveloped by said outer unit; a gradient coil system which causes eddy currents to be induced at least in regions of said outer unit; and the inner cylindrical jackets of said inner unit, said outer unit and said middle unit each having a characteristic frequency, and the characteristic frequency of said middle unit being detuned relative to at least one of the respective characteristic frequencies of said outer unit and the inner cylindrical jackets of said inner unit, so that said middle unit damps oscillatory transmission due to magnetic coupling from said outer unit to said inner unit.