Abstract: A multilayer superconducting wire 7 with essentially round cross sectional area where the outer surface of the round wire is provided with a high temperature superconductor layer 3 and where at least the high temperature superconductor layer 3 is fabricated as a spiral running along the length of the superconductor wire 7 in parallel lanes 15.

Abstract: The present invention relates to a cryostat having a service neck for access to a superconducting magnet. In many cryogenic applications components, e.g. superconducting coils for magnetic resonance imaging (MRI), superconducting transformers, generators, electronics, are cooled by keeping them in contact with a volume of liquefied, the whole cryogenic assembly being known as a cryostat. In order to operate a superconducting magnet, it must be kept at a temperature below its superconducting transition temperature. A cryostat must provide access to the vessel containing the liquefied helium for the initial cooling of the magnet to its low operating temperature, for periodic refilling of systems where there is a loss of helium, and provide sufficient access whereby to enable operation and maintenance of the magnet.

Abstract: A high-temperature superconductor fault current limiter elements (1) of standardized modular design and a high-temperature superconductor fault current limiter unit to protect an electrical application such as power network from damage in case of fault event.

Abstract: In a medical device with at least one transducer fashioned for generation of high-intensity focused ultrasound and with a magnetic resonance apparatus as well as associated ultrasound transducer, and method for generation of magnetic resonance exposures, at least one shim element is associated with the transducer for compensation of a susceptibility difference caused by the design of the transducer with regard to the transducer environment.

Abstract: In a method and device for determination of a position shift, first image data of a body region of a treatment-positioned patient that contain derivable temperature information are acquired. A focal area in the body region is determined, and the focus of a hyperthermia applicator can be aligned on the focal area. Second image data of the body region of the treatment-positioned patient that contain derivable temperature information are acquired, and a position shift of the focal area is determined by a comparison of the second image data with the first image data.

Abstract: A high-temperature superconductor fault current limiter elements (1) of standardized modular design and a high-temperature superconductor fault current limiter unit to protect an electrical application such as power network from damage in case of fault event.

Abstract: In a method and device for correction of a B0 field drift in a temperature map acquisition by magnetic resonance tomography, a fluctuation measurement is calculated per pixel from a number of magnetic resonance tomography phase images of an examination subject or from temperature maps derived therefrom. Using this fluctuation measurement, pixels of the phase images or temperature maps with low fluctuation are determined, and corresponding pixels of a phase image to be corrected or of a temperature map to be corrected are selected using the pixels determined as having low fluctuation. The phase image to be corrected or the temperature map to be corrected is adjusted to a reference phase image or a reference temperature map such that the selected pixels of the phase image to be corrected or of the temperature map to be corrected are calibrated to corresponding pixels of the reference phase image or of the reference temperature map.

Abstract: An ultrasonic transducer has at least two sets of transducer units, with all the transducer units in each set having the same focus position and the transducer units in the different sets having different focus positions. Since the focus points of the sets of ultrasonic transducer units are distributed in a relatively large spatial range, the range of ultrasonic therapy can be increased even within the narrow and limited space of magnetic resonance imaging equipment.

Abstract: A device for implementation and monitoring of thermal ablation has a device for generation of high intensity ultrasound and a magnetic resonance system for generation of examination images composed of voxels that contain temperature information. The geometry of the voxels is adapted to the shape of the ultrasound focus.

Abstract: A multilayer superconducting wire 7 with essentially round cross sectional area where the outer surface of the round wire is provided with a high temperature superconductor layer 3 and where at least the high temperature superconductor layer 3 is fabricated as a spiral running along the length of the superconductor wire 7 in parallel lanes 15.

Abstract: In a method and device for correction of a B0 field drift in a temperature map acquisition by magnetic resonance tomography, a fluctuation measurement is calculated per pixel from a number of magnetic resonance tomography phase images of an examination subject or from temperature maps derived therefrom. Using this fluctuation measurement, pixels of the phase images or temperature maps with low fluctuation are determined, and corresponding pixels of a phase image to be corrected or of a temperature map to be corrected are selected using the pixels determined as having low fluctuation. The phase image to be corrected or the temperature map to be corrected is adjusted to a reference phase image or a reference temperature map such that the selected pixels of the phase image to be corrected or of the temperature map to be corrected are calibrated to corresponding pixels of the reference phase image or of the reference temperature map.

Abstract: In a method and device for determination of a position shift, first image data of a body region of a treatment-positioned patient that contain derivable temperature information are acquired. A focal area in the body region is determined, and the focus of a hyperthermia applicator can be aligned on the focal area. Second image data of the body region of the treatment-positioned patient that contain derivable temperature information are acquired, and a position shift of the focal area is determined by a comparison of the second image data with the first image data.

Abstract: A substantially cylindrical cryostat defining an axial imaging region, the cryostat housing a magnet which, in use, provides a substantially homogeneous magnetic field in the imaging region, further comprising a refrigerator arranged to cool certain elements of the cryostat, said refrigerator comprising a magnetic material which, in use, oscillates along an axis of the refrigerator. The cryostat is arranged such that the axis of the refrigerator is substantially tangential to a circle centred on the axis of the cylindrical cryostat.

Abstract: In a method and an apparatus for transforming the coordinate system of MRI-guided medical equipment to the coordinate system of an MRI system MRI imaging is used to determine the rotational and translational values of the coordinate system of MRI-guided medical equipment relative to the coordinate system of an MRI system, so as to achieve the transformation. A number of fiducial markers are arranged in the MRI-guided medical equipment, and a coil winding is arranged on each fiducial marker for generating signals to determine its position in the coordinate system of the MRI system. The coil windings are serially connected and the serially connected windings are connected to the magnetic resonance system via an interface circuit.

Abstract: In a medical device with at least one transducer fashioned for generation of high-intensity focused ultrasound and with a magnetic resonance apparatus as well as associated ultrasound transducer, and method for generation of magnetic resonance exposures, at least one shim element is associated with the transducer for compensation of a susceptibility difference caused by the design of the transducer with regard to the transducer environment.

Abstract: A device for supplying electric energy to at least one superconductor, with the superconductor being cooled in a cooled region to at least one predetermined temperature for achieving superconductivity, includes at least one electric energy source, and a transformer for transferring electric energy between the at least one energy source and the superconductor. The transformer has a primary winding electrically connected with the energy source and a secondary winding electrically connected with the superconductor, wherein at least the secondary winding of the transformer is arranged within the cooled region.

Abstract: The present invention relates to pulse tube refrigerators for recondensing cryogenic liquids. In particular, the present invention relates to the same for magnetic resonance imaging systems. In many cryogenic applications components, e.g. superconducting coils for magnetic resonance imaging (MRI), superconducting transformers, generators, electronics, are cooled by keeping them in contact with a volume of liquified gases (e.g. Helium, Neon, Nitrogen, Argon, Methane . . . ). Any dissipation in the components or heat getting into the system causes the volume to part boil off. To account for the losses, replenishment is required. This service operation is considered to be problematic by many users and great efforts have been made over the years to introduce refrigerators that recondense any lost liquid right back into the bath. The present invention addresses the problems arising from convection which occurs within a pulse tube refrigerator. The invention provides.

Abstract: In a method for assessing ambient conditions of an installation site of a magnetic resonance imaging device, various places in an area surrounding the installation site are examined by means of a detection unit for changes in a test magnetic field and the ambient conditions are determined from the results of the examination. The detection unit includes a magnetic field generator and a magnetic field sensor.

Abstract: A device for implementation and monitoring of thermal ablation has a device for generation of high intensity ultrasound and a magnetic resonance system for generation of examination images composed of voxels that contain temperature information. The geometry of the voxels is adapted to the shape of the ultrasound focus.

Abstract: The supraconductor device contains a rotor, which can rotate about a rotational axis, with a supraconductive coil in a heat conducting coil support. The coil support comprises a central cylindrical cavity. A cooling head, which is located outside of the rotor, of a cooling unit is connected in a heat conductive manner to a heat transfer body, which projects into the cavity of the coil support while remaining stationary. An annular gap located between the coil support and the heat transfer body is filled with a heat conducting contact gas.