Hitachi, Ltd.

Hitachi Medical Corporation

Hitachi Engineering Co., Ltd.

Kunihito Suzuki

Hirofumi Motoshiromizu

Hiroyuki Watanabe

Akira Kurome

Yoshihide Wadayama

Hirotaka Takeshima

Kenji Sakakibara

Takeshi Yatsuo

Shin Hoshino

Kunihiro Takayama

The present invention relates to a magnetic resonance imaging apparatus, which includes a apparatus bottom surface, a static magnetic field generator, two pieces of which are placed opposite each other vertically across an image pickup space, and a plurality of support legs for supporting a weight of the resonance imaging apparatus, the support legs being elastically deformed in a direction in which the weight is to be applied, and being arranged between the apparatus bottom surface and a floor. Furthermore, each of the support legs has a spring constant which is set to absorb a displacement between the apparatus bottom surface and the floor, while bearing the weight. This MRI apparatus has the simple structure enabling the efficient damping of the vibrations which may cause the deterioration of magnetic resonance images.

Magnetic resonance imaging apparatus

An MRI apparatus having a configuration that reduces vibration of a static magnetic field generating source is provided. A closed vesselof the static magnetic field generating source is provided with a rigid structurefor preventing transmission of vibration generated from a gradient magnetic field generating partto other members via the closed vessel. The rigid structureuses, for example, a connecting partthat connects a faceon the imaging space side and a faceconfronting it. The rigidity of the closed vessel is thereby increased, and therefore vibration transmitted from the gradient magnetic field generating part can be reduced. The connecting part can have a through-hole structure, and in such a case, internal space of through-hole can be used for drawing cables.

Magnetic resonance imaging device

In the MRI apparatus of the present invention, a reinforcing member is firmly provided so as to enhance the rigidity strength of two connecting tubes connecting upper and lower cryostats, thereby suppression of vibration caused by a gradient magnetic field coil and suppression of variation of static magnetic field can be realized. Further, in the MRI apparatus of the present invention, the reinforcing member is provided in upper and lower portions of the connecting tubes of the vacuum vessels, thereby suppression of vibration caused by the gradient magnetic field coil and suppression of variation of static magnetic field can be realized. Further, in the MRI apparatus of the present invention, the reinforcing member is provided in upper and lower parts of the vacuum vessels, thereby suppression of vibration caused by the gradient magnetic field coil and suppression of variation of static magnetic field can be realized.

Magnetic resonance imaging apparatus with suppressed noise

The MRI apparatus has ring-shaped superconducting coils arranged to vertically oppose each other. The superconducting coils are installed in ring-shaped cooling containers. The cooling containers are accommodated in radiation shield plates. The radiation shield plates are accommodated in vacuum vessels. The cooling containers are connected together at at least two locations. Support members are arranged between an outer wall surface of the lower cooling container and an inner wall surface of the lower vacuum vessel to support the lower cooling container on the lower vacuum vessel. The upper cooling container is free, supported only by the connecting tubes connecting the upper and lower cooling containers.

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Hitachi, Japan

Kunihito Suzuki