Title:
開放型MR装置におけるノイズ抑制
Document Type and Number:
Japanese Patent JP2005512705
Kind Code:
A
Abstract:
The invention relates to an MR apparatus ( 1 ) having an examination volume ( 6 ) of the open type such that the examination volume ( 6 ) is also accessible laterally, having main coil devices ( 2 ) for producing a main magnetic field that are disposed on two opposite sides of the examination volume ( 6 ), having at least one high-frequency coil device ( 5 ) for exciting the proton precession and having at least one two-part gradient coil device ( 4 ), disposed on opposite sides of the examination volume ( 6 ), for the positional coding of the excitation of the proton precession. The dynamic Lorentz forces have hitherto resulted in a high oscillation level. It is an object of the invention to provide an MR apparatus ( 1 ) that has only a low oscillation level. The invention proposes that, on at least one side of the examination volume ( 6 ), a central recess ( 7 ) extends from the examination volume ( 6 ) and through the main coil device ( 2 ), in which recess ( 7 ) a holding element ( 9 ) is disposed to whose side facing the examination volume ( 6 ) the gradient coil device ( 4 ) is exclusively attached.
Inventors:
Harvey, Paul Earl
Overwech, Johannes Ahr
Fan Omen, Alfred Har
Overwech, Johannes Ahr
Fan Omen, Alfred Har
Application Number:
JP2003555228A
Publication Date:
May 12, 2005
Filing Date:
December 19, 2002
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
A61B5/055; G01R33/38; G01R33/385; G01R33/3815; (IPC1-7): A61B5/055; G01R33/3815; G01R33/385
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito