Siemens Healthcare Gmbh

Siemens Aktiengesellschaft

Stephan Stöcker

Swen Campagna

Markus Vester

Dominik Paul

Thorsten Feiweier

Jürgen Nistler

Matthias Gebhardt

Nikolaus Demharter

Tobias Kober

Wolfgang Bielmeier

Carsten Prinz

Gudrun Ruyters

Helmut Lenz

Daniel Nico Splitthoff

Gerhard Brinker

Bernd Erbe

Uvo Hölscher

Christian Wünsch

A radio-frequency control system for a magnetic resonance tomography system and a method for the operation thereof are provided. The radio-frequency control system includes a controller and a radio-frequency power amplifier with amplification between a signal input and a signal output of the radio-frequency power amplifier that is dependent on a predetermined frequency response. The controller determines a control pulse for multislice excitation and outputs the pulse to the signal input of the radio-frequency power amplifier. The controller determines a high-frequency power value for the control pulse in dependence on the predetermined frequency response of the radio-frequency power amplifier.

Device and method for generating excitation pulses

A method for monitoring a temporal change in a magnetic field in a magnetic resonance device, as well as an evaluation unit, a magnetic resonance device, and a computer program product for performing the method are provided. The method provides that a position-dependent magnetic field distribution that is produced by the plurality of gradient coils is provided with a plurality of monitoring points. In addition, time-dependent gradient values of the plurality of gradient coils are ascertained. Based on position-dependent magnetic field distribution and the time-dependent gradient values, the temporal change in the magnetic field is ascertained. The temporal change in the magnetic field is monitored by comparing the temporal change in the magnetic field with at least one limit value.

Monitoring of a temporal change in a magnetic field in a magnetic resonance device

A method for operating a magnetic resonance apparatus by a safety unit, taking into account persons fitted with an implant, a safety unit, a safety system, a magnetic resonance apparatus, and a computer program product are provided. The magnetic resonance apparatus includes a first part and a second part. The first part is operated separately from the second part and includes the safety unit. During an examination of a person fitted with an implant, the safety unit checks that the magnetic resonance apparatus, in a restricted operating mode, is complying with implant-conformant limit values.

Operation of a magnetic resonance apparatus taking into account persons fitted with implants

The embodiments relate to signal selection devices for reception antennas. The signal selection device includes a plurality of signal inputs for the reception of signals from the reception antennas via an interface arrangement, and a plurality of signal outputs for the output of altered signals from the reception antennas. The signal selection device is used for selecting/reducing received signals from the reception antennas and forwarding them to an image processing device. The signal selection device contains a plurality of A/D converter chips, a plurality of digital selection chips, and at least physical and/or logical portions of a control unit. The received signals from the reception antennas are fed into the plurality of A/D converter chips via a plurality of signal inputs, are converted into digital data streams, and are supplied to the digital selection chips via signal outputs of the A/D converter chips.

Signal selection of received signals in MRI local reception antennas utilizing metadata and analog-digital (A/D) converter chips

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Baiersdorf, Germany

Stephan Stöcker