Patent ID: 7053744

Claim:
A magnetic resonance tomography device comprising: a toroidal magnet shell having a longitudinal axis and surrounding and defining an interior cylindrical volume radially centered with respect to said longitudinal axis; a similarly toroidal magnet body disposed in said interior volume; an encapsulation cylinder, defining a cylindrical surface of said cylindrical volume; a switchable gradient coil system disposed between said cylindrical surface and said magnet body; and a capsule completely enclosing a radial outer surface of said magnet shell and connected to said encapsulation cylinder with an acoustically sealed connection for preventing acoustic vibrations, generated during switching of said switchable gradient coil system and transmitted to said magnet shell, from penetrating into said radial outer surface, said capsule comprising a three-layer system having an outermost cover layer, a center layer comprising a full foam layer, and an inner layer comprising a partial foam layer containing foam elements in a form selected from the group consisting of foam patches and foam strips.