Abstract: An endoscopy system has an endo-robot that is navigable within an anatomical lumen of a patient by interacting with a magnetic field generated by an extracorporeal magnet system. The patient lies on a patient bed that is movable in one or more directions and/or orientations, and an obstacle detects objects in the movement path of the endo-robot in the anatomical lumen and produces a signal that causes the position and/or orientation of the patient bed to be altered dependent thereon.

Abstract: A device is for repeated semi-invasive abrasion of lesions on the walls of hollow organs, in particular blood vessels or the gastrointestinal tract of a patient. The device includes an outer stent which, fixed in position at the site of the lesions, can be clamped against the wall of the hollow organ and has recesses through which the lesions can inwardly protrude. The device further includes a cutting body which is guided within the outer stent and only negligibly narrows the internal bore of the outer stent, which cutting body has cutting edges sliding on the inner side of the outer stent and is coupled magnetically to an external magnet system via which it can turn about the stent axis and/or can move longitudinally along the stent axis.

Abstract: A linear drive including a stator and a rotor configured for linear reciprocal movement along an axis, with the stator having a magnetic-field guide core having a plurality of legs extending each with one foot substantially toward the rotor, with the rotor having a plurality of magnets disposed in a linear array along the direction of the axis, wherein at least one of a respective one of respective lengths of the magnets along the axis and the respective widths of the legs along the axis and the respective spacings of the legs along the axis are different such that force components of the magnets along the axis will substantially compensate each other when the linear drive is in a de-energized state.

Abstract: A device is for introducing a stent into a hollow organ, in particular into the gastrointestinal tract of the body of a patient. The device includes a magnet system which covers the area of treatment of the patient and generates a 3D gradient field for remote-controlled movement and orientation of an endorobot. The endorobot is provided with a linear magnet and is freely movable in the hollow organ. Further, the stent, which can be uncoupled from the outside, is secured to the endorobot in a folded-down state so that it can be brought to the site of use and can there be opened out so as to bear firmly on the wall of the hollow organ.

Abstract: A magnetic body is displaceable in a contact-free manner in a working chamber by the use of a magnetic coil system composed of fourteen individually controllable coils. Three magnetic field components and five magnetic field gradients are produced. Apart from two individual coils in the coil system, the other coils, which may be saddle-shaped coils, are arranged on lateral tubular surfaces surrounding the working chamber.

Abstract: A linear drive including a stator and a rotor configured for linear reciprocal movement along an axis, with the stator having a magnetic-field guide core having a plurality of legs extending each with one foot substantially toward the rotor, with the rotor having a plurality of magnets disposed in a linear array along the direction of the axis, wherein at least one of a respective one of respective lengths of the magnets along the axis and the respective widths of the legs along the axis and the respective spacings of the legs along the axis are different such that force components of the magnets along the axis will substantially compensate each other when the linear drive is in a de-energized state.

Abstract: A cryostat having a connecting branch which is connected to a coolant chamber and is open on the end side. The connecting branch expands from an inside diameter to an outside diameter.

Abstract: For releasing a therapeutic agent, a release is disclosed. The release allows a release or expulsion of the therapeutic agent that is adapted appropriately for the therapy, and/or for the specific properties of the therapeutic agent.

Abstract: A device is for repeated semi-invasive abrasion of lesions on the walls of hollow organs, in particular blood vessels or the gastrointestinal tract of a patient. The device includes an outer stent which, fixed in position at the site of the lesions, can be clamped against the wall of the hollow organ and has recesses through which the lesions can inwardly protrude. The device further includes a cutting body which is guided within the outer stent and only negligibly narrows the internal bore of the outer stent, which cutting body has cutting edges sliding on the inner side of the outer stent and is coupled magnetically to an external magnet system via which it can turn about the stent axis and/or can move longitudinally along the stent axis.

Abstract: A device is for introducing a stent into a hollow organ, in particular into the gastrointestinal tract of the body of a patient. The device includes a magnet system which covers the area of treatment of the patient and generates a 3D gradient field for remote-controlled movement and orientation of an endorobot. The endorobot is provided with a linear magnet and is freely movable in the hollow organ. Further, the stent, which can be uncoupled from the outside, is secured to the endorobot in a folded-down state so that it can be brought to the site of use and can there be opened out so as to bear firmly on the wall of the hollow organ.

Abstract: In a method for the operation of a magnetic resonance apparatus having a gradient coil system as well as a shim system with a number of shim plates with respectively allocated heaters, at least one information signal indicating a change in shape and/or position of the gradient coil system is determined or employed, the regulation of the heaters, and thus the temperatures of the respective shim plates ensuing dependent thereon.

Abstract: Cryostat having a connecting branch which is connected to a cooling chamber and is open on the end side, raised parts and/or depressions increasing the wall surface being provided on at least part of the inner wall of the connecting branch.

Abstract: A magnetic resonance tomography apparatus, in particular an iron-guided or permanently magnetic, short or open magnetic resonance tomography apparatus, has thermally highly sensitive components and a temperature controller, formed by a foil heater which is provided with a control device and can be controlled in opposition to the internal dynamic heat sources.

Abstract: In a method for the operation of a magnetic resonance apparatus having a gradient coil system as well as a shim system with a number of shim plates with respectively allocated heaters, at least one information signal indicating a change in shape and/or position of the gradient coil system is determined or employed, the regulation of the heaters, and thus the temperatures of the respective shim plates ensuing dependent thereon.

Abstract: A magnetic resonance tomography apparatus, in particular an iron-guided or permanently magnetic, short or open magnetic resonance tomography apparatus, has thermally highly sensitive components and a temperature controller, formed by a foil heater which is provided with a control device and can be controlled in opposition to the internal dynamic heat sources.

Abstract: In a method for the operation of a magnetic resonance apparatus having at least one gradient coil and elements for generating a force acting on the gradient tube, with which natural oscillation modes of the gradient tube are excited, so as to oppose oscillations of the gradient tube produced by Lorentz forces, drive signals are supplied for the excitation of the elements, and the amplitudes and/or the phases of the drive signals are varied for adjusting the force generated by the elements and acting on the gradient tube so as to compensate modifications of the oscillatory behavior of the gradient tube. The drive signals are varied dependent on at least one measured value representing a criterion for the change of the oscillatory behavior.

Abstract: A magnetic resonance apparatus has a gradient tube at which at least one gradient coil with current flowing therein in operation is arranged, and at which a number of elements for generating a force acting on the gradient tube as needed are arranged, with the positions of the elements being selected dependent at least on the vibratory mode of the gradient tube, so that a counteracting mode is excited given drive of the elements. The elements serving for the excitation of X and/or Y modes are distributed in the middle and around the circumference of the gradient tube with respect to the length of the gradient tube and/or the elements serving for the excitation of the Z mode are distributed along the length and the circumference of the gradient tube.