Magnetic resonance tomography device having a noise-suppressing function by damping mechanical vibrations

• Main Author: DROBNITZKY MATTHIAS
• Format: Patent
• Language: English
• Published: 12.07.2005
• Edition: 7
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MEDICAL OR VETERINARY SCIENCE; PHYSICS; SURGERY; TESTING

It is possible to suppress noise by intensively damping mechanical vibrations in MRT devices, especially gradient coils and magnet vessels, using compound materials containing centers of negative stiffness. The invention relates to a core spin tomography device, wherein the vibrations of the device components, which can in many aspects have a negative effect on the entire system, can be reduced or the noise transmission paths can be reduced. The core spin tomography device has a basic field magnet which is surrounded by a magnet envelope which surrounds and defines an inner area, a gradient coil system being disposed inside the inner area. Damping elements made of a material having a negative stiffness are arranged on an inner side of the magnet envelope defining the inner area in order to absorb acoustic vibrations which are produced during switching of the gradient coil system.