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US 8,013,605 B2Granted
Magnetic resonance system having a superconducting whole-body receiving arrangement
AssigneeSiemens Aktiengesellschaft
InventorVolker Matschl
Life of this patent
Estimating the term…
Abstract
A data acquisition unit of a magnetic resonance system has an examination region therein, relative to which an examination subject is conveyed by a patient bed. The data acquisition unit has a built-in radio-frequency transmission arrangement, that radiates radio-frequency energy into the examination subject, and a built-in reception arrangement that receives radio-frequency magnetic resonance signals emitted from the examination subject as a result of excitation by the radiated radio-frequency energy. The reception arrangement operates as a resistive arrangement when the radio-frequency energy is being radiated by the transmission arrangement, and operates as a superconducting arrangement when the magnetic resonance signals are being received thereby.
Claims14
A magnetic resonance system comprising:
- a magnetic resonance data acquisition unit comprising an interior examination region that is open axially at opposite ends relative to a central axis, said examination region being radially surrounded by an inner wall of the data acquisition unit;
- a transport bed configured to receive an examination subject thereon and being movable to convey the examination subject into and out of the examination region;
- a basic field magnet built into the data acquisition unit that generates a static, basic magnetic field in the examination region;
- an RF energy transmission arrangement built into the data acquisition unit that radiates a substantially homogenous RF field in an entirety of the examination region, causing the examination subject in the examination region to emit magnetic resonance signals;
- a radio-frequency reception arrangement built into the data acquisition unit that receives the magnetic resonance signals emitted by the examination subject;
- said reception arrangement operating as a resistive arrangement when said radio-frequency energy is radiated by the transmission arrangement, and operating as a superconducting arrangement when said magnetic resonance signals are received by the reception arrangement;
- and
- a single structural arrangement that forms both said transmission arrangement and said reception arrangement, and that is operable in a transmission mode and a reception mode, said structural arrangement comprising current-carrying elements that carry a reception current in the reception mode and that carry an excitation current in the transmission mode that flows in a current flow direction, said current-carrying elements, transverse to said current flow direction, exhibiting a superconducting partial cross section and a non-superconducting partial cross section, said superconducting partial cross section having a current-carrying capacity between said reception current and said excitation current, and said reception current propagating in said superconducting partial cross section and said excitation current propagating in said non-superconducting partial cross section.
5 more elements
A magnetic resonance system as claimed in comprising:
- a magnetic resonance data acquisition unit comprising an interior examination region that is open axially at opposite ends relative to a central axis, said examination region being radially surrounded by an inner wall of the data acquisition unit;
- gradient coils built into said data acquisition unit;
- a transport bed configured to receive an examination subject thereon and being movable to convey the examination subject into and out of the examination region;
- a basic field magnet built into the data acquisition unit that generates a static, basic magnetic field in the examination region;
- an RF energy transmission arrangement built into the data acquisition unit that radiates a substantially homogenous RF field in an entirety of the examination region, causing the examination subject in the examination region to emit magnetic resonance signals;
- a radio-frequency reception arrangement built into the data acquisition unit that receives the magnetic resonance signals emitted by the examination subject, said reception arrangement comprising a plurality of reception coils, and comprising thermal shielding that shields said reception coils individually from said examination region and from said gradient coils;
- and
- said reception arrangement operating as a resistive arrangement when said radio-frequency energy is radiated by the transmission arrangement, and operating as a superconducting arrangement when said magnetic resonance signals are received by the reception arrangement.
5 more elements
A magnetic resonance system comprising:
- a magnetic resonance data acquisition unit comprising an interior examination region that is open axially at opposite ends relative to a central axis, said examination region being radially surrounded by an inner wall of the data acquisition unit;
- a transport bed configured to receive an examination subject thereon and being movable to convey the examination subject into and out of the examination region;
- a basic field magnet built into the data acquisition unit that generates a static, basic magnetic field in the examination region;
- an RF energy transmission arrangement built into the data acquisition unit that radiates a substantially homogenous RF field in an entirety of the examination region, causing the examination subject in the examination region to emit magnetic resonance signals;
- a radio-frequency reception arrangement built into the data acquisition unit that receives the magnetic resonance signals emitted by the examination subject;
- said reception arrangement operating as a resistive arrangement when said radio-frequency energy is radiated by the transmission arrangement, and operating as a superconducting arrangement when said magnetic resonance signals are received by the reception arrangement;
- and
- an evaluation device that wirelessly receives said magnetic resonance signal, received by the reception arrangement, from said reception arrangement.
5 more elements
A magnetic resonance system comprising:
- a magnetic resonance data acquisition unit comprising an interior examination region that is open axially at opposite ends relative to a central axis, said examination region being radially surrounded by an inner wall of the data acquisition unit;
- a transport bed configured to receive an examination subject thereon and being movable to convey the examination subject into and out of the examination region;
- a basic field magnet built into the data acquisition unit that generates a static, basic magnetic field in the examination region;
- an RF energy transmission arrangement built into the data acquisition unit that radiates a substantially homogenous RF field in an entirety of the examination region, causing the examination subject in the examination region to emit magnetic resonance signals;
- a radio-frequency reception arrangement built into the data acquisition unit that receives the magnetic resonance signals emitted by the examination subject;
- said reception arrangement operating as a resistive arrangement when said radio-frequency energy is radiated by the transmission arrangement, and operating as a superconducting arrangement when said magnetic resonance signals are received by the reception arrangement;
- and
- a cooled preamplifier connected downstream from said reception arrangement that pre-amplifies the magnetic resonance signal received by the reception arrangement.
5 more elements
Dependencies are inferred from the claim text.