Abstract: A local coil for percutaneous MRT-guided minimally invasive intervention is provided. The local coil has a central antenna coil having an opening for passing through an instrument. A first plurality of first peripheral antenna coils surround the central antenna coil on an outer circumference. The local coil is configured to be arranged flat on a body surface of a patient.

Abstract: A medical imaging system a magnet unit includes a main magnet and a first housing. In an embodiment, the main magnet is arranged inside the first housing and includes coil elements and at least one coil carrier, the magnet unit defining an examination opening. The first radiation unit is embodied to irradiate the examination object and is arranged on the side of the magnet unit. The magnet unit includes a first region, transparent to radiation emitted by the first radiation unit radially to the examination axis. The first radiation unit is embodied to emit radiation through the first region of the magnet unit in a direction of the examination opening and is furthermore embodied to rotate about the examination opening.

Abstract: A magnetic resonance unit includes a shim coil apparatus and a gradient coil apparatus. The shim coil apparatus is configured to compensate for basic magnetic field inhomogeneities of the first order in an examination region of the magnetic resonance unit. The shim coil apparatus includes at least one shim coil element. The gradient coil apparatus is arranged in a gradient coil layer. In addition to the gradient coil apparatus, at least one part of the at least one shim coil element is arranged in the gradient coil layer.

Abstract: A magnetic resonance unit includes a shim coil apparatus and a gradient coil apparatus. The shim coil apparatus is configured to compensate for basic magnetic field inhomogeneities of the first order in an examination region of the magnetic resonance unit. The shim coil apparatus includes at least one shim coil element. The gradient coil apparatus is arranged in a gradient coil layer. In addition to the gradient coil apparatus, at least one part of the at least one shim coil element is arranged in the gradient coil layer.

Abstract: An imaging system includes a magnetic resonance imaging device and a radiation generator that are mechanically linked to each other such that both surround a patient bore for receiving and positioning the examination subject. The magnetic resonance imaging device has at least one main magnet for generating a magnetic field, and the radiation generator has a radiation source for generating radiation. The imaging system is configured from a static part and a part that is rotatable through an angle of rotation such that at least one rotatable main magnet is rotatable around a static radiation generation unit or a rotatable radiation generation unit is rotatable around at least one static main magnet. The imaging system includes at least two passive shim units, of which at least one static shim unit is stationary and at least one rotatable shim unit is fixedly connected to the rotatable part.

Abstract: A method and a system for magnetic resonance imaging are provided. The method includes acquiring a magnetic resonance (MR) data set of an object by sampling only a portion of a k-space of the object. This sampled portion may be substantially triangle-shaped or be composed of multiple planes that extend through a point of origin of the k-space and are tangential to a common spherical cap in the k-space. An inverse Fourier transformation is then applied to the MR data set to transform the MR data set from the k-space to image space. A final MR image with a fan- or cone-beam geometry is then computed based on the transformed MR data set in image space.

Abstract: Methods for performing digital subtraction angiography of a region of interest of a patient are described herein. The methods include acquiring a filled image data set of the region of interest by x-ray imaging and creating an angiography image data set by subtracting a mask image data set from the filled image data set, wherein an x-ray imaging device for x-ray imaging and a further imaging device for at least one additional imaging modality are co-registered and operable to acquire image data in the same field of view, wherein the imaging devices are used to simultaneously acquire the filled image data set using the x-ray imaging device and an anatomy data set using the further imaging device and the mask image data set in derived from the anatomy data set in a conversion process, which converts additional imaging modality image data into virtual x-ray image data.

Abstract: A medical imaging system a magnet unit includes a main magnet and a first housing. In an embodiment, the main magnet is arranged inside the first housing and includes coil elements and at least one coil carrier, the magnet unit defining an examination opening. The first radiation unit is embodied to irradiate the examination object and is arranged on the side of the magnet unit. The magnet unit includes a first region, transparent to radiation emitted by the first radiation unit radially to the examination axis. The first radiation unit is embodied to emit radiation through the first region of the magnet unit in a direction of the examination opening and is furthermore embodied to rotate about the examination opening.

Abstract: A method and an x-ray apparatus for interferometric 2D x-ray imaging, use a Talbot-Lau interferometer having at least one phase grating and an analysis grating for producing 2D images of an object to be examined using a phase stepping method. A stepwise readout of a detector is carried out continuously at a multiplicity of the phase positions of an interference pattern. Time sequences of readout interval data records which overlap in time are extracted from the readout data records, and at least one result image data record is calculated from an absorption image and/or a phase-contrast image and/or a dark-field image from each readout interval data record.

Abstract: An imaging system includes a magnetic resonance imaging device and a radiation generator that are mechanically linked to each other such that both surround a patient bore for receiving and positioning the examination subject. The magnetic resonance imaging device has at least one main magnet for generating a magnetic field, and the radiation generator has a radiation source for generating radiation. The imaging system is configured from a static part and a part that is rotatable through an angle of rotation such that at least one rotatable main magnet is rotatable around a static radiation generation unit or a rotatable radiation generation unit is rotatable around at least one static main magnet. The imaging system includes at least two passive shim units, of which at least one static shim unit is stationary and at least one rotatable shim unit is fixedly connected to the rotatable part.

Abstract: A method and a system for magnetic resonance imaging are provided. The method includes acquiring a magnetic resonance (MR) data set of an object by sampling only a portion of a k-space of the object. This sampled portion may be substantially triangle-shaped or be composed of multiple planes that extend through a point of origin of the k-space and are tangential to a common spherical cap in the k-space. An inverse Fourier transformation is then applied to the MR data set to transform the MR data set from the k-space to image space. A final MR image with a fan- or cone-beam geometry is then computed based on the transformed MR data set in image space.

Abstract: Methods for performing digital subtraction angiography of a region of interest of a patient are described herein. The methods include acquiring a filled image data set of the region of interest by x-ray imaging and creating an angiography image data set by subtracting a mask image data set from the filled image data set, wherein an x-ray imaging device for x-ray imaging and a further imaging device for at least one additional imaging modality are co-registered and operable to acquire image data in the same field of view, wherein the imaging devices are used to simultaneously acquire the filled image data set using the x-ray imaging device and an anatomy data set using the further imaging device and the mask image data set in derived from the anatomy data set in a conversion process, which converts additional imaging modality image data into virtual x-ray image data.

Abstract: A mobile grating-detector arrangement has an X-ray detector and at least one grating. The grating-detector arrangement is configured to record an interferometric X-ray image of at least one body part of a patient in a patient bed in operation. In addition, an X-ray system with such a grating-detector arrangement and its use for X-ray interferometric imaging is described.

Abstract: A method and an x-ray apparatus for interferometric 2D x-ray imaging, use a Talbot-Lau interferometer having at least one phase grating and an analysis grating for producing 2D images of an object to be examined using a phase stepping method. A stepwise readout of a detector is carried out continuously at a multiplicity of the phase positions of an interference pattern. Time sequences of readout interval data records which overlap in time are extracted from the readout data records, and at least one result image data record is calculated from an absorption image and/or a phase-contrast image and/or a dark-field image from each readout interval data record.

Abstract: The invention relates to a bearing device (100) for the contactless bearing of a rotor in relation to a stator (101). Said bearing device (100) comprises a rotor provided with a shaft (102) and at least one rotor disk (103), and a stator (101) provided with at least two stator disks (105, 106). Said stator (101) at least partially surrounds the rotor at a certain distance and the rotor disks (103) protrude into the intermediate chamber (104) between the rotor disks thus forming a bearing gap (107). Said bearing device (100) also comprises a magnetic bearing part for bearing the rotor in a radial manner and an air bearing part for bearing the rotor in an axial manner.

Abstract: Disclosed is a saddle-shaped coil winding which is formed onto an outer tube surface from a planar race track-type coil shape so as to be provided with axially extending winding sections on the longitudinal side and winding sections that extend therebetween, are located on the front side, and form winding overhangs. The individual windings of the coil winding are to be formed with at least one band-shaped superconductor which comprises especially high Tc superconductor material and whose narrow side faces the outer tube surface. In order to prevent unacceptable mechanical stresses of the conductor when forming the coil, the windings in the saddle shape have a circumferential length which is virtually unchanged from the length in the planar oil shape.

Abstract: A fully transposed composite superconductor of the Roebel bar type is produced. The superconductor is formed from combines superconductors. The process step for forming the subconductors, which are being configured with a lateral projection into a region of a neighbouring subconductor, is separated from the stranding step. Carrier strips, which are coated with the superconductive material, are used as the conductors.

Abstract: An optical measuring device for determining temperature in a cryogenic environment includes at least one optical waveguide provided with at least one fiber Bragg grating sensor that is interrogated by a light signal. The device includes a light injector that injects light into the at least one fiber Bragg grating sensor, and an evaluation unit that determines a temperature value from the modulated light signal emanating from the at least one fiber Bragg grating sensor. The device includes at least one jacket that non-rigidly encloses the optical waveguide, at least in the region of the at least one fiber Bragg grating sensor. The jacket has a larger coefficient of thermal expansion, at least at cryogenic temperatures, than the optical waveguide. A winding arrangement for use in a cryogenic environment is provided with such a device for temperature monitoring of a conductor of the winding arrangement.

Abstract: In a superconductive connection for two end pieces of superconductors that each have a matrix of normally-conductive material and at least one superconductor lead, of superconductive material, in the matrix, and in a method for making such a superconductive connection, the respective end pieces of the conductor leads are stripped of the matrix material and are inserted into a sheath or bushing. MgB2, as superconductive contacting material, is additionally inserted into the sheath or bushing, so as to at least partially fill regions in the sheath or bushing between the conductor leads. The cross-section of the sheath or bushing is then reduced.

Abstract: Disclosed is a saddle-shaped coil winding which is formed onto an outer tube surface from a planar race track-type coil shape so as to be provided with axially extending winding sections on the longitudinal side and winding sections that extend therebetween, are located on the front side, and form winding overhangs. The individual windings of the coil winding are to be formed with at least one band-shaped superconductor which comprises especially high Tc superconductor material and whose narrow side faces the outer tube surface. In order to prevent unacceptable mechanical stresses of the conductor when forming the coil, the windings in the saddle shape have a circumferential length which is virtually unchanged from the length in the planar oil shape.