Siemens Aktiengesellschaft

Siemens Healthcare Gmbh

Siemens Healthineers Ag

Dentsply Sirona Inc.

Sirona Dental Systems Gmbh

Stephan Biber

Markus Vester

Mario Zeller

Jürgen Nistler

Jan Bollenbeck

David Grodzki

Helmut Greim

Ralph Oppelt

Daniel Driemel

Klaus Huber

Thorsten Speckner

Rainer Schneider

Andreas Greiser

Matthias Gebhardt

Wilfried Schnell

Andreas Krug

Andre De Oliveira

Andreas Potthast

Jörg Rothard

Adam Paul Johnstone

Adrian Bampton

Stefan Popescu

Wolfgang Renz

Thomas Kundner

Adrian Mark Thomas

Volker Model

Martin Hemmerlein

Gerhard Metz

Karsten Jahns

Nicholas Aley

Ralf Ladebeck

Juergen Nistler

Stephan Zink

Volker Matschl

Sebastian Martius

Robert Rehner

Andreas Fackelmeier

Yvonne Candidus

Peter Heubes

Franz Eiermann

Robert Greiner

Zeng He He

Lennart Kilian

Edgar Müller

Johannes Ulrici

Michael Mallett

Rainer Kurth

Katharina Hesels

Stephan Kannengieβer

Kay Uwe Seemann

Joerg Rothard

Ian Edward Nichols

David James Sadler

Thorsten Feiweier

Sebastian Schmidt

Thomas Beck

Stephan Kannengiesser

Jianmin Wang

Dieter Ritter

Swen Campagna

Björn Heismann

Patrick Gross

Nikolaus Demharter

Razvan Lazar

Hubertus Fischer

Ludwig Eberler

Daniel K Sodickson

Johann Sukkau

Kun Zhou

Klaus Ludwig

Lars Lauer

Hai Jun Wang

De He Weng

Georg Pirkl

Rudi Baumgartl

Rene Kartmann

Klaus Porzelt

Christian Wünsch

Philipp Hoecht

Carl Udo Maier

Jochen Ostermaier

Steffen Wolf

Li Ma

Georg Rauh

Sven Heggen

Marcel Kruip

Stephan Kannengießer

Jian Min Wang

Martin Nisznansky

Sebastian Dennert

Kuan Jin Lee

Elisabeth Weiland

Jan Ruff

Heinz Hahn

Georg Martschenko

Ralf Ladeback

Johanna Dorothee Schöpfer

Tobias Wichmann

Joerg Christopher Stapf

Sören Grübel

A magnetic resonance system has an air suction apparatus configured and arranged so as to suck air exhaled by a patient examined by the MR system. A method for operating the MR system is also provided, with which air exhaled by a patient examined by the MR system is sucked in.

Magnetic resonance system with air suction apparatus

The disclosure relates to a dental coil comprising a transmitter unit including an antenna, a receiver unit with an array of antennas, and a carrier element to be positioned in use on the jaw region of the patient and to follow at least part of the outer shape of the jaw region of the patient, wherein the carrier element is moreover designed to hold the array of antennas of the receiver unit in a predetermined relative position with respect to the jaw region of the patient, such that the array of antennas of the receiver unit borders the outer shape of the jaw region in the predetermined relative position. The disclosure further relates to a magnetic resonance system having a magnetic resonance apparatus and a dental coil, wherein the magnetic resonance apparatus is designed to detect magnetic resonance signals from a jaw region of the patient via the dental coil.

Dental coil for a magnetic resonance system

A magnetic resonance tomography system with a sensor for detecting spikes and with a gradient coil. Nuclear spins of an object under observation are excited by a magnetic alternating field of the magnetic resonance tomography system. A gradient field is generated by the magnetic resonance tomography system using the gradient coil. A magnetic resonance signal is acquired using a receiving antenna of the magnetic resonance tomography system and an interference signal using the sensor. From the magnetic resonance signal an image is reconstructed as a function of the acquired interference signal of the sensor.

Sensor for detecting gradient-bounded interference to a magnetic resonance tomography system and method for operation

Systems and methods for ascertaining an item of movement information concerning movement of an object under examination during a magnetic resonance scan. A pilot tone signal generator of a magnetic resonance apparatus transmits a pilot tone signal. At least one first coil element of the magnetic resonance apparatus receives the pilot tone signal. The pilot tone signal received by the at least one first coil element is in each case a first pilot tone received signal. At least one second coil element of the magnetic resonance apparatus receives the pilot tone signal. The pilot tone signal received by the at least one second coil element is in each case a second pilot tone received signal. The at least one first pilot tone received signal is corrected with the aid of the at least one second pilot tone received signal. The item of movement information for the object under examination is ascertained using the corrected at least one first pilot tone received signal.

Method for ascertaining an item of movement information

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 apparatus may include at least one sensor and a controller. The magnetic resonance apparatus is positionable in an examination room. A spatial location of the magnetic resonance apparatus in the examination room can be determined using the sensor. In a method for supporting an adjustment of a shim parameter of a magnetic resonance apparatus, a current spatial location of the magnetic resonance apparatus in an examination room is determined using the sensor, and a shim parameter of at least one shim element of the magnetic resonance apparatus is determined based on the current spatial location of the magnetic resonance apparatus and information of a magnetic field database. The magnetic field database may include information about a spatial location of the magnetic resonance apparatus and also magnetic field data correlated with the spatial location.

Apparatus and method for supporting a shimming of a magnetic resonance 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 imaging device may include a field generator for generating at least one magnetic gradient field. The field generator may include a first magnet and a second magnet confining an imaging volume of the magnetic resonance imaging device in two spatial directions. The first magnet and the second magnet may be arranged asymmetrically with respect to the imaging volume. The magnetic resonance imaging device may be used to perform a method for acquiring an image of a diagnostically relevant body region of a patient.

Magnetic resonance imaging device with asymmetric field generation unit

A magnetic resonance imaging device having a field generation unit configured to provide a magnetic field in an imaging volume of the magnetic resonance imaging device. The field generation unit has at least one magnet. A surface of the field generation unit directed towards the imaging volume of the at least one magnet has a concave shape, wherein a direction of access to the imaging volume is oriented essentially perpendicular to a main direction of magnetic field lines in the imaging volume.

Magnetic resonance imaging device with a concave-shaped field generation unit

A magnetic resonance tomograph and a method for operating a magnetic resonance tomograph. In a transmitting state of the magnetic resonance tomograph nuclear spins are excited in an object under examination with an excitation pulse by a high-frequency unit of the magnetic resonance tomograph via a transmitting antenna. The magnetic resonance tomograph is switched over from the transmitting state to a receiving state in a period of less than 40 microseconds. In a further step, in the receiving state, a magnetic resonance signal is received with a receiving antenna.

Magnetic resonance tomograph and method for rapid switchover from TX to RX

In accordance with a method for operating an MRT system a first MR recording is performed so as to map an object to generate first MR data that represents the object. The first MR recording is performed in accordance with a first k-space scanning scheme and during the first MR recording at least one first excitation pulse is transmitted. A second MR recording that is different from the first MR recording is performed to generate second MR data and a noise component is determined in dependence upon the second MR data by a computing unit and the noise component represents an influence of at least one external noise source. An MR image is generated by the computing unit in dependence upon the first MR data and in dependence upon the noise component.

Magnetic resonance tomography having dual recording for noise reduction

A magnetic resonance tomography scanner and a method for testing the magnetic resonance tomography scanner are provided. The magnetic resonance tomography scanner has a transmitter that is configured to transmit two-tone signals at different levels and to acquire intermodulation products of the two-tone signal with the receiver. A status of a receive path is inferred via a behavior of odd-order intermodulation products.

Magnetic resonance tomography scanner and method for testing

An imaging apparatus has an MRT system with an MR receiving antenna configured to receive a first receive signal containing an MR signal from an object to be examined during an examination period. The imaging apparatus includes a modality for examining the object and/or for acting on the object via mechanical or electromagnetic waves, wherein the modality has an electronic circuit. The imaging apparatus includes an auxiliary antenna arranged and configured to receive a second receive signal containing an interference signal generated by the electronic circuit during the examination period. The imaging apparatus has a processing system configured to suppress interference in the first receive signal based on the first and the second receive signal.

Magnetic resonance tomography with signal interference suppression

A gradient coil unit including a first conductor structure arranged within a first form and a second conductor structure arranged within a second form, wherein the first conductor structure and the second conductor structure are designed together to generate a magnetic field gradient in a first direction, the first form and the second form are arranged separately, opposite each other, and divided by a hollow space, and the first form has a segment of a circle as a cross section.

Non-cylindrical gradient coil unit

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

Growing community of inventors

Erlangen, Germany

Stephan Biber