Thermal bus structure for a magnetic resonance imaging device
AssigneeSiemens Healthcare GmbH
InventorsAdrian Mark Thomas, Simon Chorley, Nicholas Aley
Life of this patent
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Abstract
The disclosure relates to a magnetic resonance imaging device comprising a main magnet, a gradient system including at least one gradient coil, a thermal bus structure, a shield structure arranged between the gradient system and the main magnet and a cryocooler including a cold head, wherein the shield structure is configured to reduce a transport of heat energy to the main magnet and wherein the main magnet comprises a magnet spacer configured for spacing individual coils of the main magnet, wherein the thermal bus structure comprises at least one thermal bus element extending through the magnet spacer for providing a thermal connection between the cold head of the cryocooler and the shield structure.
Claims20
A magnetic resonance imaging device, comprising:
- a main magnet including a magnet spacer configured to maintain a predefined positional relationship between separate coils of the main magnet;
- a gradient system including a gradient coil;
- a shield structure arranged between the gradient system and the main magnet, the shield structure comprising a thermal shield and an electromagnetic shield that are separate from one another, the thermal shield being configured to reduce a transport of heat energy to the main magnet;
- a cryocooler including a cold head;
- and
- a thermal bus structure including a thermal bus element extending through the magnet spacer for providing a thermal connection between the cold head of the cryocooler and the thermal shield of the shield structure.
A magnetic resonance imaging device, comprising:
- a main magnet including a magnet spacer configured to maintain a predefined positional relationship between separate coils of the main magnet,
- wherein the main magnet is surrounded by a heat-insulating layer;
- a gradient system including a gradient coil;
- a shield structure arranged between the gradient system and the main magnet, the shield structure being configured to reduce a transport of heat energy to the main magnet;
- a cryocooler including a cold head;
- and
- a thermal bus structure including a thermal bus element extending through the magnet spacer for providing a thermal connection between the cold head of the cryocooler and the shield structure,
- wherein an inner surface of a hole in the magnet spacer, which provides a passageway for the thermal bus element, is covered by the heat-insulating layer to reduce a heat exchange between the magnet spacer and the thermal bus element.
A magnetic resonance imaging device, comprising:
- a main magnet including a magnet spacer configured to maintain a predefined positional relationship between separate coils of the main magnet;
- a gradient system including a gradient coil;
- a shield structure arranged between the gradient system and the main magnet, the shield structure being configured to reduce a transport of heat energy to the main magnet,
- wherein a section of the shield structure comprises a plurality of concentric, axially spaced rings mechanically connected via a plurality of struts oriented in parallel with a cylinder axis defined by the plurality of concentric, axially spaced rings;
- a cryocooler including a cold head;
- and
- a thermal bus structure including a thermal bus element extending through the magnet spacer for providing a thermal connection between the cold head of the cryocooler and the shield structure.
Dependencies are inferred from the claim text.