Siemens Aktiengesellschaft

Siemens Healthcare Gmbh

Siemens Healthineers Ag

Siemens Medical Solutions Usa, Inc.

Massachusetts Institute of Technology

Yale University

Case Western Reserve University

Siemens Aktiengesell Schaft

Massachusetts General Hospital Corporation

Other

Siemans Ag

Markus Vester

Stephan Biber

Jürgen Nistler

Ralph Oppelt

Wolfgang Renz

Jan Bollenbeck

Oliver Heid

Wilfried Schnell

Jianmin Wang

Matthias Gebhardt

Juergen Nistler

Ralf Ladebeck

Robert Rehner

Peter Speier

Sebastian Schmidt

Stefan Schwarzer

Peter Feld

Stefan Popescu

Rainer Alfred Kuth

Nikolaus Demharter

Jian Wang

Klaus Huber

Sebastian Martius

Horst Kroeckel

Robert Krieg

Gudrun Ruyters

Dominik Paul

Stefan Stocker

Swen Campagna

Helmut Greim

Ludwig Eberler

Andreas Fackelmeier

Andre De Oliveira

Gerhard Brinker

Klaus Pistor

Andreas Potthast

Wolfgang Bielmeier

Florian Poprawa

Carsten Prinz

Mark A Griswold

Arne Reykowski

Rainer Schneider

Georg Pirkl

Adam Albrecht

David Grodzki

Thorsten Feiweier

Lawrence Leroy Wald

Matthias J Schmand

Björn Heismann

Nan Zhang

Razvan Lazar

Edgar Mueller

Dirk Diehl

Francisco Miguel Hernandez-Guerra

Florian Steinmeyer

Claus Seisenberger

Marcel Jan Marie Kruip

Christopher Jude Amies

Ralf Kartäusch

Elfar Adalsteinsson

Tong Tong

Paul Beasley

Martin Hergt

Norbert Rietsch

Mario Zeller

Yang Wang

Thorsten Speckner

Stephan Kannengiesser

Matthias Fenchel

James Luke Corbeil

Anthony Peter Hulbert

Bjoern Heismann

Bernd Granz

Hubertus Fischer

Wei Dong Wang

Ralph Kimmlingen

Zhi Bin Li

Johannes Reinschke

Ronald Nutt

Günter Ries

Jörg Zapf

Daniel K Sodickson

Volker Matschl

Helmut Lenz

Rene Gumbrecht

Wilhelm Duerr

Zhibin Li

Wen Ming Li

Ronald Grazioso

Martin Requardt

Lan Jin Wang

Rudi Baumgartl

Ludwig Kreischer

Yvonne Candidus

Michael Koehler

Michael Köhler

Yu Tang

Carmel Hayes

Zeng He He

Thomas Kluge

A system includes two magnetic resonance tomography units. Each of the magnetic resonance tomography units includes a magnet unit having a magnetic controller for generating a homogenous magnetic field. The magnetic controller is configured to change the homogenous magnetic field in a short, predetermined time within image acquisition of an object under examination, such that a Larmor frequency for a predetermined layer of the object under examination remains in a predetermined frequency range. A first magnetic resonance tomography unit has a first predetermined frequency range, and a second magnetic resonance tomography unit has a second predetermined frequency range. The first predetermined frequency range and the second predetermined frequence range are disjoint.

System including magnetic resonance tomography units operated with limited bandwidth

A local coil array for a magnetic resonance tomography unit includes a plurality of antenna coils for receiving magnetic resonance signals from a patient, a first frequency converter for converting the magnetic resonance signals to a first intermediate frequency, and a plurality of transmission coils for transmitting intermediate frequency signals by inductive coupling. The magnetic resonance tomography unit includes a field of view and a plurality of reception coils for inductively coupling to transmission coils of the local coil array. The plurality of reception coils is arranged next to the field of view such that the plurality of reception coils inductively couples with transmission coils of the local coil array arranged at a patient in the field of view.

Wireless local coil array with low intermediate frequency

A local coil control apparatus and a wireless local coil in a magnetic resonance imaging system. The apparatus includes a control signal transmission unit, the control signal transmission unit including a wireless receiving unit, a control signal extraction unit, and a control signal distribution unit. The wireless receiving unit receives, by a receiving antenna, a signal from a radiofrequency power amplifier emitted by a body coil of the MRI system, and transmits the signal to the control signal extraction unit; the control signal extraction unit, if it detects that the signal is background noise, generates a control signal instructing a local coil unit to switch to a tuned state, and, if it detects that the signal is broadband noise, generates a control signal instructing the local coil unit to switch to a detuned state, and distributes the control signal to each local coil unit through the control signal distribution unit.

Local coil control apparatus and wireless local coil in magnetic resonance imaging system

A magnetic resonance tomography unit includes a magnet unit having a magnetic controller for generating a homogenous magnetic field. The magnetic controller is configured to change the homogenous magnetic field in a short, predetermined time within image acquisition of an object under examination, such that a Larmor frequency for a predetermined layer of the object under examination remains in a predetermined frequency range. A layer in the object under examination is selected and a value for the homogenous magnetic field, in which the Larmor frequencies of the nuclear spins of the layer lie in a predetermined frequency band, is determined by a control unit taking into account a predetermined magnetic field gradient. The established value for the homogenous magnetic field and the predetermined magnetic field gradient is set by the magnetic controller, and an excitation pulse, frequencies of which only lie in the predetermined frequency band, is emitted.

Magnetic resonance tomography unit and method for operating a magnetic resonance tomography unit with limited bandwidth

A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.

Operating an MRI apparatus

A magnetic resonance tomography unit and a method for operating the magnetic resonance tomography unit are provided. The magnetic resonance tomography unit has a transmission interference suppression device with a transmission interference suppression control system, a sensor, and a transmission interference suppression antenna. The transmission interference suppression device is configured to acquire, with the sensor, an excitation signal of the transmitter, and determine, with the transmission interference suppression control system, a transmission interference suppression signal dependent upon the acquired excitation signal of the transmitter. The transmission interference suppression device is configured to transmit, via the transmission interference suppression antenna, the transmission interference suppression signal, so that at a predetermined location outside the magnetic resonance tomography unit, the excitation signal emitted by the transmitter via the transmitter antenna is attenuated.

Method and apparatus for suppressing interference emissions in magnetic resonance systems

A magnetic resonance tomography system that includes a transmitter for generating an excitation signal and a body coil for emitting the excitation signal, and a method for operation of the magnetic resonance tomography system are provided. The magnetic resonance tomography system has a patient tunnel, in which the body coil is arranged. The magnetic resonance tomography system also has a first transmission interference suppression antenna that is arranged between the body coil and an opening in the patient tunnel. The first transmission interference suppression antenna is configured to provide a spatial transmission characteristic that may be compared with the body coil.

Method and apparatus for interference suppression for MR whole body antennas

The disclosure relates to a magnetic resonance imaging device configured to exert a high-frequency electromagnetic field on an object under test in a static magnetic field and to reconstruct an image based on magnetic resonance signals. The magnetic resonance imaging device comprises a receiving coil comprising a plurality of receiving coil elements and configured to receive magnetic resonance signals and feed the magnetic resonance signals to a receiver, and a coupler configured to be coupled with at least a first receiving coil element of the receiving coil, the coupler being directionally coupled with at least the receiver, the first receiving coil element being configured to receive a high-frequency electromagnetic wave signal through the coupler. The directional coupling between the coupler and the receiver is so regulated that the first receiving coil element transmits the high-frequency electromagnetic wave signal to the object under test to sense a physiological movement signal.

Respiratory detection transceiver

An MRI scanner and a method for operation of the MRI scanner are provided. The MRI scanner has a first receiving antenna for receiving a magnetic resonance signal from a patient in a patient tunnel, a second receiving antenna for receiving a signal having the Larmor frequency of the magnetic resonance signal, and a receiver. The second receiving antenna is located outside of the patient tunnel or near an opening thereof. The receiver has a signal connection to the first receiving antenna and the second receiving antenna and is configured to suppress an interference signal by the second receiving antenna in the magnetic resonance signal received by the first receiving antenna.

MRI scanner with active interference suppression and interference suppression method for an MRI scanner

A magnetic resonance apparatus including: a scanner; a patient receiving region which is at least partially surrounded by the scanner; and a lighting apparatus designed to light the patient receiving region. The lighting apparatus includes at least one lighting element; and two neutralizing elements designed to at least partially neutralize a voltage that is induced by a high-frequency field of the scanner.

Magnetic resonance apparatus with a lighting apparatus

Techniques are disclosed for a local coil and a magnetic resonance imaging system. The local coil includes a plurality of coil units that respectively receive magnetic resonance signals generated when magnetic resonance detection is performed on a detected object, and a signal processing unit configured to perform processing including signal preprocessing and quadrature modulation on the magnetic resonance signals received by the plurality of coil units to obtain signals to be transmitted. Contactless connectors are also disclosed, each being configured to couple the signals to be transmitted to a contactless connector at the MR system side.

Local coil and magnetic resonance imaging system

The disclosure relates to a receiving unit configured for acquiring MR signals from an examination object in a magnetic resonance device. The receiving unit may include a detector unit comprising a light source and a first optical detector, a sensor unit comprising a first optical magnetometer, a first optical waveguide connecting the sensor unit to the light source, and a second optical waveguide connecting the sensor unit to the first optical detector.

Quantum sensor-based receiving unit configured for acquiring MR signals

A magnetic resonance tomography system has an interference suppression transmitter and an interference suppression antenna. The interference suppression transmitter is configured to output an interference suppression signal via the interference suppression antenna as a function of a transmission interference suppression parameter determined from a patient property. In a predetermined region of an environment of the magnetic resonance tomography system, a field strength of the excitation pulse is reduced by destructive interference.

Device and method for patient-specific interference suppression

A magnetic resonance apparatus, for acquiring magnetic resonance data from a person who is asleep, includes a person support apparatus to provide a sleeping place; an acquisition arrangement including a radiofrequency coil arrangement for transmitting excitation pulses and for receiving magnetic resonance signals; and a controller, designed to operate the acquisition arrangement according to a magnetic resonance sequence for acquiring a magnetic resonance dataset from a region under examination of the person. The magnetic resonance apparatus includes a main magnetic field of strength less than 20 mT, in particular less than 10 mT, and the controller includes an acquisition unit for acquiring a magnetic resonance dataset via a prolonged magnetic resonance sequence having a total acquisition duration of more than one hour.

Magnetic resonance apparatus and method for operating a magnetic resonance apparatus, computer program and electronically readable data storage medium

Growing community of inventors

Nürnberg, Germany

Markus Vester