Frequency monitoring of gradient pulses in magnetic resonance imaging
US-2015369889-A1 · Dec 24, 2015 · US
Mri apparatus
US2025035726A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025035726-A1 |
| Application number | US-202418591184-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 29, 2024 |
| Priority date | Mar 2, 2023 |
| Publication date | Jan 30, 2025 |
| Grant date | — |
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Abstract
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In one embodiment, an MRI apparatus includes: a cylindrical static magnetic field magnet; a cylindrical gradient coil; a vibration isolator; and processing circuitry. The cylindrical static magnetic field magnet is configured to generate a static magnetic field. The cylindrical gradient coil is installed inside the static magnetic field magnet. The cylindrical gradient coil is configured to generate a gradient magnetic field. The vibration isolator is disposed between the static magnetic field magnet and the gradient coil. The vibration isolator includes a plurality of vibration-proof materials provided in a circumferential direction of a cylindrical body of the static magnetic field magnet and in a height direction of the cylindrical body, each of the vibration-proof materials being composed of a pair of a spring and a damper. The processing circuitry is configured to control springs and dampers constituting the plurality of vibration-proof materials according to a type of pulse sequence.
First claim
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What is claimed is: 1 . An MRI apparatus comprising: a cylindrical static magnetic field magnet configured to generate a static magnetic field; a cylindrical gradient coil installed inside the static magnetic field magnet, the cylindrical gradient coil being configured to generate a gradient magnetic field; a vibration isolator disposed between the static magnetic field magnet and the gradient coil, the vibration isolator including a plurality of vibration-proof materials provided in a circumferential direction of a cylindrical body of the static magnetic field magnet and in a height direction of the cylindrical body, each of the vibration-proof materials being composed of a pair of a spring and a damper; and processing circuitry configured to control either or both of springs and dampers constituting the plurality of vibration-proof materials according to a type of pulse sequence to be executed. 2 . The MRI apparatus according to claim 1 , wherein the processing circuitry is configured to control softness/hardness of either or both of the springs and the dampers constituting the plurality of vibration-proof materials according to positions of an antinode and a node at time of vibration of the gradient coil, the antinode and the node being positionally determined depending on the type of pulse sequence to be executed. 3 . An MRI apparatus comprising: a cylindrical static magnetic field magnet configured to generate a static magnetic field; a cylindrical gradient coil installed inside the static magnetic field magnet, the cylindrical gradient coil being configured to generate a gradient magnetic field; a vibration isolator disposed between the static magnetic field magnet and the gradient coil, the vibration isolator including a plurality of vibration-proof materials provided in a circumferential direction of a cylindrical body of the static magnetic field magnet; and processing circuitry configured to control softness/hardness of the vibration-proof materials according to positions of an antinode and a node at time of vibration of the gradient coil, the antinode and the node being positionally determined according to a type of pulse sequence to be executed.
Assignees
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Classifications
Manufacture and installation of gradient coils, means for providing mechanical support to parts of the gradient-coil assembly (manufacture of inductances or coils in general H01F41/00) · CPC title
- G01R33/3854Primary
means for active and/or passive vibration damping or acoustical noise suppression in gradient magnet coil systems · CPC title
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- What does patent US2025035726A1 cover?
- In one embodiment, an MRI apparatus includes: a cylindrical static magnetic field magnet; a cylindrical gradient coil; a vibration isolator; and processing circuitry. The cylindrical static magnetic field magnet is configured to generate a static magnetic field. The cylindrical gradient coil is installed inside the static magnetic field magnet. The cylindrical gradient coil is configured to gen…
- Who is the assignee on this patent?
- Canon Medical Systems Corp
- What technology area does this patent fall under?
- Primary CPC classification G01R33/3854. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Jan 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).