Abstract: A local coil unit for a magnetic resonance apparatus, which radiates a radio-frequency field into an examination subject, has a housing and at least a part of the housing is formed of an insulating dielectric material that passively compensates for an inhomogeneity in the high-frequency field in the subject. The material has a relative dielectric value ?r of greater than 50, preferably greater than 100, and a dielectric loss factor tan ? of less than 2.5×10?2, preferably less than 1×10?3. In the dielectric material displacement currents are generated which create an additional magnetic field that compensates for the minima in the B1 field as a result of the eddy currents arising in the patient due to the radio-frequency radiation.

Abstract: A magnetic resonance has a scanner unit with an examination space for placing at least a region of an examination subject therein, a gradient coil unit movable in a displacement direction at least in the examination space, a component of the scanner unit surrounding the examination space, and at least one pillow that can be arranged between the gradient coil unit and the component and which has an internal pressure that can be controlled for fixing the gradient coil unit relative to the component.

Abstract: A magnetic resonance device has a gradient coil system, with an adhesive introduced between the gradient coil system and the rest of the magnetic resonance device to attach the gradient coil system to the rest of the magnetic resonance device.

Abstract: A magnetic resonance system has a transport element and an examination tunnel with an inner tunnel contour and a tunnel axis. An examination subject can be inserted into the examination tunnel in the direction of the tunnel axis by means of the transport element. At least one local coil that exhibits an outer coil contour (viewed in cross-section relative to the tunnel axis) and that can be pivoted around a base pivot axle, so as to be adjusted to the examination subject, is disposed in the examination tunnel. The base pivot axle is disposed at the edge of the examination tunnel and runs parallel to the tunnel axis.

Abstract: A coil arrangement for a magnetic resonance system has a resonator that is followed by a modulator with which a magnetic resonance signal of the resonator is modulated onto a carrier frequency. An infeed element follows the modulator with which that magnetic resonance signal modulated onto the carrier frequency is supplied into a single transmission cable. In a corresponding reception circuit, an analog-to-digital converter is preceded by a demodulator with which the magnetic resonance signal is demodulated.

Abstract: In a method and apparatus for continuously, directly monitoring the RF-tightness of a shielded cubicle of an MR system, a radio-frequency signal is transmitted to the cubicle from the outside via an antenna and the signal part that passes to the interior is identified with a receiver in the inside of the cubicle. An RF transmission antenna arranged at the outside in the door region of the shielded cubicle is connected to an RF output of the MR system, and a body coil of the MR system is employed as a reception antenna for determining the RF tightness of the shielded cubicle of the MR system, and is connected to a monitoring receiver.

Abstract: A magnetic resonance system has a transport element by means of which an examination subject can be inserted into and removed from an examination tunnel. The examination tunnel is surrounded by an outer antenna arrangement, by means of which the examination subject can be excited to emit magnetic resonance signals, and which can receive these signals. In the examination tunnel, an auxiliary arrangement can be disposed that has a tunnel that, given arrangement of the auxiliary arrangement in the examination tunnel is parallel to the examination tunnel. with the auxiliary arrangement in the examination tunnel, the transport element still can be inserted into and removed from the examination tunnel. The auxiliary arrangement has an inner antenna arrangement that surrounds the tunnel thereof, and by means of which magnetic resonance signals excited in the examination subject can be received. The auxiliary arrangement also has an elastically yielding layer on its outer circumferential surface.

Abstract: A magnetic resonance antenna has at least five antenna elements, each of, which extends essentially radially from an inner element beginning to at least one outer element end with respect to a center axis. The antenna elements are at least magnetically coupled with one another.

Abstract: An RF transmission/reception antenna for an open MR system, wherein the bottom and top poles of the basic field magnet are connected to one another by two columns, is composed of an electrically conductive connecting loop that surrounds the patient space and is formed by the basic field magnetic system with the connecting columns, with a shortening capacitor inserted in the loop.

Abstract: A device to install and remove a structural component in and from a medical large device has a guide system that simplifies the difficult handling of the structural component due to the size or the weight of the structural component. The guide system has a first guide rail that can be positioned on a height-adjustable patient bed of the large device, and a guide groove which is arranged on the structural component. Additionally, another second guide rail can be attached to the medical large device, which forms an extension of the first guide rail when the patient bed is correspondingly positioned. With this device the structural component can be easily raised and lowered with the aid of the height-adjustable patient bed, and can easily be slid into and out of the large device when the first and second rails are at the same height.

Abstract: In a method for magnetic resonance imaging with adherence to SAR limit values, a patient is charged with a radio-frequency pulse sequence via at least one transmission antenna for the implementation of a measurement in a magnetic resonance tomography apparatus, and the magnetic resonance signals that are produced are acquired in a spatially resolved manner via at least one reception antenna and are further-processed for producing magnetic resonance images or spectra. SAR values are determined before the implementation of the measurement on the basis of patient data and the position of the patient relative to the transmission antenna for planned parameters of the measurement, and the parameters are modified as needed until the SAR values lie within the SAR limit values. The position of the patient relative to the transmission antenna is exactly determined by an imaging magnetic resonance pre-measurement.

Abstract: A circular, planar radio-frequency antenna for open MR devices has two spaced systems composed of planar conductors arranged on a carrier plate for currents that cross one another and that are capacitively shortened by tuning capacitors applied to ground at at least one end for tuning to the desired resonant frequency. A planar metal layer is arranged on each carrier plate, the two currents that are in turn phase-offset by 90° being supplied into the layer offset by 90°. Tuning capacitors are arranged at the feed point and at the side opposite thereto.

Abstract: A shim device for a magnetic resonance apparatus has a cavity for the acceptance of shim elements, the cavity being arranged in an antenna conductor.

Abstract: A magnetic resonance has a scanner unit with an examination space for placing at least a region of an examination subject therein, a gradient coil unit movable in a displacement direction at least in the examination space, a component of the scanner unit surrounding the examination space, and at least one pillow that can be arranged between the gradient coil unit and the component and which has an internal pressure that can be controlled for fixing the gradient coil unit relative to the component.

Abstract: In a method and apparatus for continuously, directly monitoring the RF-tightness of a shielded cubicle of an MR system, a radio-frequency signal is transmitted to the cubicle from the outside via an antenna and the signal part that passes to the interior is identified with a receiver in the inside of the cubicle. An RF transmission antenna arranged at the outside in the door region of the shielded cubicle is connected to an RF output of the MR system, and a body coil of the MR system is employed as a reception antenna for determining the RF tightness of the shielded cubicle of the MR system, and is connected to a monitoring receiver.

Abstract: In a method for magnetic resonance imaging with adherence to SAR limit values, a patient is charged with a radio-frequency pulse sequence via at least one transmission antenna for the implementation of a measurement in a magnetic resonance tomography apparatus, and the magnetic resonance signals that are produced are acquired in a spatially resolved manner via at least one reception antenna and are further-processed for producing magnetic resonance images or spectra. SAR values are determined before the implementation of the measurement on the basis of patient data and the position of the patient relative to the transmission antenna for planned parameters of the measurement, and the parameters are modified as needed until the SAR values lie within the SAR limit values. The position of the patient relative to the transmission antenna is exactly determined by an imaging magnetic resonance pre-measurement.

Abstract: Actuators for handling furniture parts to be coated are provided. For this purpose, a feeder device is provided which has a plurality of lifting bolts arranged in a grid-like manner and which can travel vertically in a simplified manner thereby that all lifting bolts of a row can be locked by common locking means and that all lifting bolts of a line can be acted upon by common actuating means.

Abstract: A coil arrangement for a magnetic resonance system has a resonator that is followed by a modulator with which a magnetic resonance signal of the resonator is modulated onto a carrier frequency. An infeed element follows the modulator with which that magnetic resonance signal modulated onto the carrier frequency is supplied into a single transmission cable. In a corresponding reception circuit, an analog-to-digital converter is preceded by a demodulator with which the magnetic resonance signal is demodulated.

Abstract: A control device for a medical-technical system automatically acquires a status of at least one element of the medical-technical system and compares it to a reference status. When a comparison of the statuses meets a status condition, the control device implements a self-test of at least one system part of the medical-technical system. The test result is communicated to the control device and processed by it.

Abstract: A circular, planar radio-frequency antenna for open MR devices has two spaced systems composed of planar conductors arranged on a carrier plate for currents that cross one another and that are capacitively shortened by tuning capacitors applied to ground at at least one end for tuning to the desired resonant frequency. A planar metal layer is arranged on each carrier plate, the two currents that are in turn phase-offset by 90° being supplied into the layer offset by 90°. Tuning capacitors are arranged at the feed point and at the side opposite thereto.