EP 1425597 A1 20040609 - MAGNETIC RESONANCE TOMOGRAPHY DEVICE HAVING A NOISE-SUPPRESSING FUNCTION BY DAMPING MECHANICAL VIBRATIONS
Title (en)
MAGNETIC RESONANCE TOMOGRAPHY DEVICE HAVING A NOISE-SUPPRESSING FUNCTION BY DAMPING MECHANICAL VIBRATIONS
Title (de)
MAGNET-RESONANZ-TOMOGRAPHIEGERÄT MIT LÄRMUNTERDRÜCKUNG DURCH DÄMPFUNG VON MECHANISCHEN SCHWINGUNGEN
Title (fr)
APPAREIL DE TOMOGRAPHIE A RESONANCE MAGNETIQUE A MOYENS ANTI-BRUIT PAR AMORTISSEMENT DES VIBRATIONS MECANIQUES
Publication
Application
Priority
- DE 0203204 W 20020830
- DE 10143048 A 20010903
Abstract (en)
[origin: WO03025609A1] It is possible to suppress noise by intensively damping mechanical vibrations in MRT devices, especially gradient coils and magnet vessels, using compound materials containing centres of negative stiffness. The invention generally relates to core spin tomography (otherwise known as magnetic resonance tomography or MRT) as used in medicine in order to examine patients. More specifically, the invention relates to a core spin tomography device, wherein the vibrations of the components of said device, 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 inventive core spin tomography device has a basic field magnet (1) which is surrounded by a magnet envelope (12) which surrounds and defines an inner area (15), a gradient coil system (2) being disposed inside said inner area (15). Damping elements made of a material (14) having a negative stiffness are arranged on an inner side of the magnet envelope (12) defining the inner area (15) in order to absorb acoustic vibrations which are produced during switching of the gradient coil system (2).
IPC 1-7
IPC 8 full level
G01R 33/28 (2006.01); A61B 5/055 (2006.01); G01R 33/385 (2006.01)
CPC (source: EP KR US)
A61B 5/055 (2013.01 - KR); G01R 33/3854 (2013.01 - EP US)
Citation (search report)
See references of WO 03025609A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03025609 A1 20030327; CA 2459122 A1 20030327; DE 10143048 C1 20030417; EP 1425597 A1 20040609; JP 2005521434 A 20050721; JP 4214056 B2 20090128; KR 20040029149 A 20040403; US 2004196041 A1 20041007; US 6917200 B2 20050712
DOCDB simple family (application)
DE 0203204 W 20020830; CA 2459122 A 20020830; DE 10143048 A 20010903; EP 02760140 A 20020830; JP 2003529185 A 20020830; KR 20047003207 A 20020830; US 48849504 A 20040302