NMR TMOGRAPHY MACHINE WITH NOISE SUPPRESSION BY DAMPING OF MECHANICAL VIBRATIONS

摘要

Noise suppression is provided by strong damping of mechanical vibrations in NMR machines, in particular gradient coils and magnet vessels, through the use of composite materials that include centers of electrostrictive property. The NMR tomography machine according to the invention has a basic field magnet that is surrounded by a magnet casing that surrounds and delimits an inner space, a gradient coil system being located in this inner space. Provided on an inner side, delimiting the inner space, of the magnet casing for the purpose of absorbing acoustic vibrations that are produced on switching over of the gradient coil system are damping elements made from a material with an electrostrictive property.