Siemens Aktiengesellschaft

Siemens Healthcare Gmbh

Siemens Medical Solutions Usa, Inc.

Massachusetts Institute of Technology

Yale University

Case Western Reserve University

Massachusetts General Hospital Corporation

Other

Siemens Aktiegesellschaft

Siemans Ag

Siemens Atiengesellschaft

Markus Vester

Stephan Biber

Ralph Oppelt

Jürgen Nistler

Wolfgang Renz

Jan Bollenbeck

Oliver Heid

Wilfried Schnell

Matthias Gebhardt

Juergen Nistler

Ralf Ladebeck

Robert Rehner

Peter Speier

Sebastian Schmidt

Jianmin Wang

Stefan Schwarzer

Peter Feld

Stefan Popescu

Rainer Alfred Kuth

Jian Wang

Nikolaus Demharter

Klaus Huber

Sebastian Martius

Horst Kroeckel

Robert Krieg

Gudrun Ruyters

Dominik Paul

Stefan Stocker

Swen Campagna

Helmut Greim

Ludwig Eberler

Andreas Fackelmeier

Gerhard Brinker

Klaus Pistor

Wolfgang Bielmeier

Florian Poprawa

Carsten Prinz

Mark A Griswold

Arne Reykowski

Georg Pirkl

Adam Albrecht

Andre De Oliveira

Andreas Potthast

David Grodzki

Thorsten Feiweier

Lawrence Leroy Wald

Matthias J Schmand

Björn Heismann

Razvan Lazar

Nan Zhang

Edgar Mueller

Dirk Diehl

Francisco Miguel Hernandez-Guerra

Florian Steinmeyer

Claus Seisenberger

Marcel Jan Marie Kruip

Christopher Jude Amies

Elfar Adalsteinsson

Ralf Kartäusch

Paul Beasley

Martin Hergt

Tong Tong

Norbert Rietsch

Volker Model

Mario Zeller

Yang Wang

Thorsten Speckner

Stephan Kannengiesser

Matthias Fenchel

James Luke Corbeil

Rainer Schneider

Anthony Peter Hulbert

Bjoern Heismann

Bernd Granz

Hubertus Fischer

Zhi Bin Li

Ralph Kimmlingen

Wei Dong Wang

Johannes Reinschke

Ronald Nutt

Daniel K Sodickson

Volker Matschl

Helmut Lenz

Rene Gumbrecht

Jörg Zapf

Wilhelm Duerr

Wen Ming Li

Zhibin Li

Ronald Grazioso

Lan Jin Wang

Rudi Baumgartl

Martin Requardt

Ludwig Kreischer

Yvonne Candidus

Günter Ries

Michael Koehler

Carmel Hayes

Yu Tang

Thomas Kluge

Zeng He He

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

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

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

A MR wireless receiving coil device may include transmitters and receivers, the number of the receivers being equal to or greater than the number of the transmitters; each transmitter comprises: a coil group, an ADC group, two baseband low-pass filters, and an IQ modulation transmitter, wherein the coil group is connected to the ADC group, the ADC group is connected to the two baseband low-pass filters, the two baseband low-pass filters are connected to the IQ modulation transmitter, and the IQ modulation transmitter is provided with an antenna; each coil group contains one or more coils, and the maximum number of coils contained in each coil group is determined by available bandwidth, modulation scheme, and the bandwidth, sampling rate, and sampling accuracy of MR signal. The device and corresponding method advantageously allows an increase in the amount of magnetic resonance information transmitted per unit frequency band.

System and method for wireless magnetic resonance imaging (MRI) data transmission

The disclosure relates to a magnetic resonance tomography system and to a method for operation of the magnetic resonance tomography system. The magnetic resonance tomography system has a magnetic unit, which is configured to change a homogeneous magnetic field B0 with a magnetic field strength, which may vary between a first predetermined value on exciting nuclear spins and a second predetermined value on receiving magnetic resonance signals, in a measuring volume in a short, predetermined time, controlled by the magnetic resonance tomography system.

Magnetic resonance tomography system with B0 modulation and method for operation

A line for an electrical connection in a magnetic resonance tomography apparatus and a magnetic resonance tomography apparatus with a corresponding line are provided. The line includes an electrical interference conductor that may pick up an electromagnetic interference signal from an environment and/or irradiate the electromagnetic interference signal into the environment. The line also includes a sensor that is electrically and/or magnetically coupled to the interference line.

Line with sensor for detecting line-conducted interference in a magnetic resonance tomography apparatus

A device for generating wideband signals in a local coil and a magnetic resonance tomography system with the device are provided. The device has a first analog-digital converter for digitizing a magnetic resonance signal, a signal conditioner, a pulse filter, and a transmit antenna. The signal conditioner is configured to increase a harmonic component in an output signal of the first analog-digital converter, and the pulse filter is configured to restrict an output signal of the signal conditioner to a predetermined frequency band before the output signal of the signal conditioner is emitted via the transmit antenna. The receiver is configured to receive and digitize the signal via a receive antenna, and regain a digital representation of the magnetic resonance signal by a signal processor.

Device, system, and method for data transmission using wideband signals for local coils

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

In a method for compensating stray magnetic fields in a magnetic resonance imaging system with two or more examination areas: a value for a predefined first magnetic field to be applied in a first examination area, in addition to a basic magnetic field is provided; information defining a predefined sequence control pulse to be applied in a second examination area is provided; a stray magnetic field in the second examination area resulting from application of the first magnetic field in the first examination area is determined; a compensated sequence control pulse for the second examination area is calculated from the predefined sequence control pulse and the determined stray magnetic field; and the compensated sequence control pulse is applied to the second examination area.

Method and system for compensating stray magnetic fields in a magnetic resonance imaging system

Growing community of inventors

Nürnberg, Germany

Markus Vester