Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2008-07-15
2008-07-15
Shrivastav, Brij B (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S307000
Reexamination Certificate
active
07400146
ABSTRACT:
The invention relates to a magnetic resonance imaging (MRI apparatus comprising a main magnetic system for generating a main magnetic field in an examination volume which is enclosed by the main magnetic system. The MRI apparatus also comprises a magnetic gradient coil system comprising gradient coils. The gradient coil system is accommodated between the main magnetic system and the examination volume in order to generate gradients of the main magnetic field. The MRI apparatus also comprises a vacuum space. According to the invention, the gradient coil system only partly adjoins the vacuum space, that is, by way of its side which faces the vibrations caused by the gradient coil system in operation, while, in a specific embodiment, the end sides of the gradient coil system are available for electrical and mechanical connections outside the vacuum space.
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Katsunuma, A., et al.; Quiet MRI with Novel Acoustic Noise Reduction; Magnetic Resonance Materials in Physics, Bilogy & Med.; 2002, vol. 13, pp. 139-144.
Ham Cornelis Leonardus Gerardus
Limpens Patrick Willem Paul
Roozen Nicolaas Bernardus
Koninklijke Philips Electronics , N.V.
Shrivastav Brij B
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