Siemens Aktiengesellschaft

Siemens Healthcare Gmbh

Siemens Healthineers Ag

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Johns Hopkins University

David Grodzki

Bjoern Heismann

Stephan Biber

Sebastian Schmidt

Mathias Nittka

Mario Zeller

Rainer Schneider

Andreas Greiser

Thorsten Speckner

Arne Hengerer

Lars Lauer

Dieter Ritter

Dominik Paul

Heiko Meyer

Daniel Nico Splitthoff

Markus Vester

Thorsten Feiweier

Björn Heismann

Peter Schmitt

Himanshu Bhat

Edgar Mueller

Stefan Popescu

Rainer Alfred Kuth

Yao-Jen Chang

Ankur Kapoor

Berthold Kiefer

Matthias Fenchel

Hans-Peter Fautz

Matthias Gebhardt

Patrick Gross

Michael Deimling

Kun Zhou

Birgi Tamersoy

Gerhard Laub

David Andrew Porter

Sven Zuehlsdorff

De He Weng

Philipp Hoelzer

Bernd Schweizer

Martin Requardt

Patrick Liebig

Gerhard Brinker

Rene Kartmann

Florian Maier

Esther Raithel

Stephan Kannengießer

Katharina Hesels

Elena Nioutsikou

Waqas Majeed

Michael Kaus

Hans Weber

Ian Edward Nichols

David James Sadler

Christian Eisen

Vladimir Jellus

Andre De Oliveira

Thomas Benkert

Daniel Rinck

Michael Köhler

Gregor Koerzdoerfer

Carsten Prinz

Thomas Kluge

Uvo Hölscher

Jan Fritz

Donald Hardie

Marcel Kruip

Theresa Bachschmidt

Stephan Stoecker

Volker Weissenberger

Wilfried Landschuetz

Mark-Aleksi Keller-Reichenbecher

Stephan Kannengieβer

Gregor Körzdörfer

Annemarie Hausotte

Elmar Rummert

Nicholas Aley

Kuan Jin Lee

Armin Nagel

Robin Heidemann

Axel Joachim Krafft

Martin Ott

Jeanette Lenger

Axel Heitland

Haris Saybasili

Wuyi Zhao

Hannah Hale

Bernd Kühn

Philipp Hölzer

Nicolas Groß-Weege

In magnetic resonance imaging, shape estimation is used to limit patient burns. A localizer image or scout scan is used to determine some of the patient shape and corresponding position. A missing part, such as the arm not in the scout scan field of view, is inferred from the localizer image. The position of the inferred body part is used to predict the risk of burn, allowing generation of a warning to reposition the patient and/or change the scan settings.

Body shape estimation from localizer scan in magnetic resonance medical imaging

A computer-implemented method for providing output data comprising an indication regarding the affliction of a patient with an infectious respiratory disease, the method comprises receiving magnetic resonance imaging data, the magnetic resonance imaging data acquired using a magnetic resonance imaging system, the magnetic resonance imaging data comprising a lung region of the patient; applying a trained function to the magnetic resonance imaging data to generate the output data, the trained function being based on an artificial neural network and the output data comprising the indication regarding the affliction of the patience with the infectious respiratory disease; and proving the output data.

Providing an indication regarding the affliction of a patient with an infectious respiratory disease based on magnetic resonance imaging data

In a method for creating an image dataset of a mapping area situated in a measuring volume, k-space corresponding to the mapping area may be read out and image data may be reconstructed based on recorded first and second raw data points of k-space. The reading out of k-space may include: switching a gradient in the slice selection direction and a phase-encoding gradient in at least one further encoding direction, radiating a non-slice-selective radio-frequency (RF) excitation pulse, recording echo signals and storing them as first raw data points along a radial k-space trajectory predefined by the full strength of the phase-encoding gradients (Gp) further switched during recording of the echo signals, and reading out k-space corresponding to the mapping area as second raw data points.

Method for creating an image dataset, magnetic resonance system, computer program product and electronically readable data carrier

The disclosure relates to a method for operating a magnetic resonance apparatus, to a magnetic resonance apparatus, and to a computer program product. According to the method, a pre-measurement is carried out by the magnetic resonance apparatus, wherein carrying out the pre-measurement includes acquiring pre-measurement data for the object under examination. The pre-measurement data is evaluated to ascertain evaluation information. The evaluation information is used to determine whether a B1 field map needs to be measured.

Method for operating a magnetic resonance apparatus, magnetic resonance apparatus and computer program product

Techniques are provided for operating a magnetic resonance tomography unit. The operation includes determining a B0 field map, determining an excitation of the nuclear spins that is to be achieved, and determining a spectrally selective, generic excitation pulse for transmission by the transmitter via the antenna in dependence upon the B0 field map. The generic excitation pulse is designed to generate the excitation of the nuclear spins that is to be achieved in the patient except for local differences. The operation also comprises determining a spectrally selective, dynamic excitation pulse for transmission by the transmitter via the antenna in dependence upon the B0 field map. The excitation pulse is designed so as to compensate the local differences and thus to generate the excitation of the nuclear spins that is to be achieved in the patient, and outputting the excitation pulse via the antenna.

Generic and dynamic excitation pulse for B0 compensation

A method for operating a magnetic resonance imaging scanner, comprising: providing 3D data from a patient; providing target parameters, wherein the target parameters include an excitation of nuclear spins to be achieved; ascertaining a spectrally selective excitation pulse for emission by a transmitter based on the 3D data from the patient, wherein the spectrally selective excitation pulse is configured to generate the target parameters; and outputting the spectrally selective excitation pulse via the transmitter.

Method for operating a magnetic resonance imaging scanner, magnetic resonance imaging scanner, computer program and storage medium with the computer program

A method for operating a magnetic resonance device is provided. The magnetic resonance device includes a component that has an operating limit in relation to a state parameter. The component uses a protocol to record magnetic resonance data. The protocol includes a magnetic resonance sequence and is described by protocol parameters. A protocol parameter set that, in relation to a protocol section, allows the protocol section to be repeated as often as desired without exceeding the operating limit is provided or determined. The method includes receiving a boost parameter from a user interface. At least for the protocol section, adaptation parameters are determined at least partially automatically based on the boost parameter, such that the desired number of repetitions described by the boost parameter is established while complying with the operating limit. Magnetic resonance data is recorded with the protocol using the determined adaptation parameters.

Operating a magnetic resonance device

In a method to improved positioning of slices in which measurement data is to be recorded, a planning image of an examination object is provided that has been distortion-corrected using non-linearity data describing a non-linearity of a gradient unit of the magnetic resonance system, a desired field of view and desired slices in the at least one planning image are selected, a measurement protocol to record the measurement data is loaded, switchable gradients and/or emittable RF pulses are adapted, as a function of the non-linearity data that has been loaded and the desired slices, such that the desired slices are excited despite the non-linearities of the gradient unit, and the loaded measurement protocol is performed in the selected field of view, using the adapted gradients to be switched and/or adapted RF pulses. The measurement protocol may include switchable gradients and the emittable RF pulses.

Method for improved positioning of slices in which measurement data is to be recorded using a magnetic resonance system

A method for determining a Bmap for, for example, performing an imaging magnetic resonance measurement using a magnetic resonance apparatus, includes measuring an original magnetic field distribution in a measurement volume of the magnetic resonance apparatus, and computing a final Bmap that describes a magnetic field distribution produced in the measurement volume of the magnetic resonance apparatus by setting a shim state. The magnetic field distribution produced in the measurement volume of the magnetic resonance apparatus by setting the shim state differs from the original magnetic field distribution.

Method for determining a B0 map

A method for performing a magnetic resonance measurement of a patient using a magnetic resonance apparatus is provided. The magnetic resonance apparatus includes a radiofrequency antenna unit for producing an excitation pulse. A first B0 field map for a first motion state of the patient, and a second B0 field map for a second motion state of the patient are provided. A first excitation pulse for the first motion state, and a second excitation pulse for the second motion state are determined based on the first B0 field map and the second B0 field map. A magnetic resonance measurement is performed, during which the motion state of the patient is monitored. When the patient is in the first motion state, the radiofrequency antenna unit transmits the first excitation pulse. When the patient is in the second motion state, the radiofrequency antenna unit transmits the second excitation pulse.

Method for performing a magnetic resonance measurement of a patient, magnetic resonance apparatus, and computer program product

Techniques are provided for operating an MR scanner that comprises gradient coils configured to generate a field gradient along coordinate axes of a coil coordinate system. The techniques include receiving limit values concerning the field gradient in the coil coordinate system and an MR scan protocol. Expected orientations of a logical coordinate system are then determined and, for each one, a compliant value for a timing parameter is determined and stored in a database. The MR scanner is controlled to carry out an MR scan, and afterwards the orientation is set to a first orientation. A first value for the timing parameter according to the first orientation is determined based on the data stored in the database, and the MR scanner is controlled to carry out a scan sequence according to the first orientation and the first value.

Magnetic resonance imaging using a database of timing parameters

A method for actuating a magnetic resonance system having a radiofrequency unit designed to generate a radiofrequency pulse for the saturation of nuclear spins in an area under examination of an object under examination. The method includes loading a B0 map of the magnetic resonance system; loading frequency information on nuclear spins to be saturated in the area under examination; ascertaining at least one global RF saturation pulse for the global saturation of the nuclear spins to be saturated on the basis of the B0 map and the frequency information; and outputting the RF saturation pulse via the radiofrequency unit of the magnetic resonance system.

Actuating a magnetic resonance device with saturation

The disclosure relates to an imaging apparatus for acquiring image data from a diagnostically-relevant body region of a patient comprising a sensor and a correction unit, wherein the at least one sensor is embodied to output a signal containing information on movement of the diagnostically relevant body region of the patient and the correction unit is embodied to receive the signal from the at least one sensor, and to apply a correction method in dependence on the signal to reduce the influence of the movement of the diagnostically relevant body region of the patient on an imaging examination. The disclosure further relates to a local coil for acquiring magnetic resonance signals in a frequency and power range of a magnetic resonance measurement, and a method for correcting patient movement.

Imaging apparatus, local coil and method for correcting a patient movement

In a method for synchronous magnetic resonance (MR) imaging and radiation therapy using a combined system having a radiation apparatus and an MR imaging apparatus, wherein the system is designed to record MR signals of a subject during irradiation of the subject, a three-dimensional MR volume data set of the subject is acquired that contains a target volume for the irradiation, the location of a central beam of the radiation therapy apparatus relative to the subject, is continuously determined, and a second MR image data set is determined, which is positioned essentially perpendicular to the central beam. If the location of the central beam changes, a correspondingly changed second MR image data set is determined perpendicular to the central beam.

Method and magnetic resonance apparatus for synchronous imaging and radiation therapy

In a computer-implemented method for setting a field of view for a magnetic resonance scan, exclusion information describing a region of the original field of view that is unmapped owing to the distortion is ascertained on the basis of the distortion map for at least one first set of field-of-view parameters describing a rectangular or cuboidal original field of view, the exclusion information is used to determine a second set of field-of-view parameters to be used for the magnetic resonance scan, and the magnetic resonance scan is performed using the second set of field-of-view parameters.

System and method for setting a field of view for a magnetic resonance scan

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Erlangen, Germany

David Grodzki