Siemens Healthcare Gmbh

Siemens Aktiengesellschaft

Siemens Healthineers Ag

Robert Rehner

Markus Vester

Jan Bollenbeck

Klaus Huber

Andreas Fackelmeier

Stephan Biber

Ralph Oppelt

Helmut Greim

Stephan Zink

Stefan Popescu

Peter Speier

Stephan Kannengiesser

Thomas Kundner

Sebastian Martius

Georg Pirkl

Marijn Pieter Oomen

Gudrun Ruyters

Peter Van Haβelt

Stephan Kannengießer

Christopher Stumpf

Barbara Dornberger

Michael Miosga

A local coil for a magnetic resonance tomography system is provided. The local coil has a plate-shaped local coil body with a main extension plane, and an electronic apparatus within the local coil body. A wireless local coil generates waste heat. Therefore, the local coil has an electrically non-conducting heat sink body that is connected for the conduction of heat to the electronic apparatus, and is configured as a type of plate within the local coil body in order to distribute heat of the electronic apparatus in the main extension plane of the local coil body. This provides that a surface of the local coil has a standards-compliant temperature.

Local coil for a magnetic resonance tomography system and a magnetic resonance tomography system

A local coil includes a coil element in the form of a loop. The coil element includes a first conductor, a second conductor, and a third conductor. The coil element includes a first dielectric and a second dielectric. The first dielectric is arranged between the first conductor and the second conductor, and the second dielectric is arranged between the second conductor and the third conductor. The coil element includes a receive unit that includes the first conductor and the second conductor, and a detuning unit that includes the third conductor. In a first operating state of the coil element, the receive unit has a first resonant frequency. In a second operating state of the coil element, the detuning unit is configured to detune the resonant frequency of the receive unit so that the receive unit has a second resonant frequency different than the first resonant frequency.

Local coil with detuning function

A local coil for magnetic resonance imaging is disclosed herein. The local coil includes an electrical circuit arrangement and a coaxial cable with an internal conductor and an external conductor surrounding the internal conductor. The two ends of the coaxial cable are connected to the electrical circuit arrangement and the internal conductor and the external conductor together form an antenna loop. The internal conductor and/or the external conductor has at least one interruption and the at least one interruption divides the internal conductor and/or the external conductor into at least two separate segments in each case.

Local coil for magnetic resonance imaging

A local coil for a magnetic resonance tomography scanner has an antenna. The antenna has a conductor loop and a plurality of electronic function groups, which are arranged in a distributed manner spaced apart from one another along the conductor loop and are electrically connected to one another by flexible conductor segments.

Local coil with segmented antenna device

A local coil for a magnetic resonance tomograph includes a transmitting antenna for emitting a pilot tone, and a receiving antenna for receiving the pilot tone. The local coil also has a decoupling device for decoupling the receiving antenna from the transmitting antenna.

Local coil with integrated pilot tone transmitter

The disclosure relates to a field camera and a method for measuring a magnetic field distribution using a magnetic resonance tomograph and the field camera. The field camera has a number of samples, which are distributed over a spatial volume to be measured, and a number of receive antennas. In an act of the method, a sensitivity matrix for the receive antennas, for each sample at each receive antenna, is captured using the magnetic resonance tomograph. In another act, antenna signals of the samples in a magnetic field to be measured are captured by the receive antennas, using the magnetic resonance tomograph. Finally, magnetic resonance signals of the individual samples are determined from the antenna signals as a function of the sensitivity matrix, using a controller. In a further act, the magnetic field strength at the location of the samples may be determined from the magnetic resonance signals.

Passive field camera and method for operating the passive field camera

The invention relates to a local coil matrix and to a magnetic resonance scanner for operation by means of a low magnetic field. The local coil matrix according to the invention has a first coil winding and a second coil winding and a first low-noise pre-amplifier and second pre-amplifier, each electrically connected to a coil winding. The first coil winding has a broadband matching in a first frequency range at a Larmor frequency to the first pre-amplifier connected thereto.

Magnetic resonance scanner and local coil matrix for operation at low magnetic field strengths

A magnetic resonance device includes a radiofrequency unit that includes a radiofrequency antenna, at least one radiofrequency line and at least one radiofrequency injection point. Radiofrequency signals are transferred to the radiofrequency antenna by the at least one radiofrequency line and are coupled into the radiofrequency antenna at the at least one radiofrequency injection point. The magnetic resonance device also includes a patient receiving zone that is at least partially enclosed by the radiofrequency antenna, and a motion detection unit for detecting a movement of a patient that may be positioned within the patient receiving zone. At least one radiofrequency line includes at least one injection element by which at least one motion detection signal of the motion detection unit is coupled into the radiofrequency line.

Magnetic resonance device having a motion detection unit and a method for detecting a movement of a patient during a magnetic resonance examination

A local coil for a magnetic resonance tomography system is provided. The local coil has a coil winding and a preamplifier connected electrically thereto. The coil winding has a plurality of coil segments that are coupled capacitively to one another.

Local coil for magnetic resonance tomography system

A connecting device for establishing a data link between a docking device provided at a part of a magnetic resonance scanner, and a patient support, with at least one slot for a local coil, which can be docked to the docking device, has a first data transmission device on the patient support side, which interacts with a second data transmission device on the docking device side in order to establish the data link in the docked state. The data transmission devices each have at least one communication device designed for wireless near field communication.

Magnetic resonance device, patient support and method for data transmission using a connecting device for establishing a data link between a docking device and a patient support

The disclosure relates to a local coil with a device for providing a first mixed frequency signal and a second mixed frequency signal by a first auxiliary frequency signal and a second auxiliary frequency signal. The device has an auxiliary mixer configured to generate the second mixed frequency signal from the first auxiliary frequency signal and the second auxiliary frequency signal. The local coil has a signal input including a first signal connection to the device. The local coil is configured to jointly receive the first auxiliary frequency signal and the second auxiliary frequency signal by way of the signal input and supply them to the device by way of the first signal connection.

Local coil with frequency converter

A method for generating motion information for an at least partially moving examination region includes outputting at least one first excitation signal with a first frequency band. The first excitation signal is picked up with a receive coil arrangement of a magnetic resonance system. The at least one coil of the receive coil arrangement is configured to pick up a receive frequency band that includes the first frequency band. At least one item of motion information for the examination region is determined from the picked up first excitation signal.

Generating motion information for an at least partially moving examination region

A magnetic resonance imaging system configured for generating a three-dimensional representation of at least one breast of a patient includes: a device configured for generating a homogeneous magnetic field; a system of active gradient coils configured for generating at least one magnetic field gradient within a measurement volume; at least one breast holder having an internal space configured for positioning the at least one breast during an MRI scan within the measurement volume; at least one local coil system that includes at least one individual coil, the at least one individual coil configured to act as an antenna for receiving magnetic resonance signals; and at least one cushion configured for stabilizing the at least one breast by filling the internal space between the at least one breast and an external boundary of the internal space.

Magnetic resonance imaging system for generating a mammographic representation

The embodiments relate to a method and field probes for measuring a static and/or in particular a dynamic magnetic field in an imaging magnetic resonance tomography system, wherein the field probe includes a body surrounded by a coil. The coil includes a middle or center winding section and at least one or two outer winding sections.

MR field probes with additional windings for improving the homogeneity and localizing the measuring volume

An arrangement for detuning a receive antenna, a detunable magnetic resonance coil, and a magnetic resonance device having a detunable magnetic resonance coil are provided. The arrangement includes a receive antenna having at least one first capacitance, wherein radiofrequency signals from a magnetic resonance examination may be received by way of the receive antenna. The arrangement furthermore includes a switchable detuning circuit containing the first capacitance switched to form an oscillating circuit and a first inductance, and a switching device having a first and a second connection point to deliver a voltage between the first and a second connection point, and one or more transistors. The switching device switches the oscillating circuit to a high impedance level with aid of the one or more transistors on delivery of a positive voltage to the first connection point, preventing a radiofrequency signal from being received by way of the receive antenna.

Growing community of inventors

Neunkirchen am Brand, Germany

Robert Rehner