Siemens Healthcare Gmbh

Siemens Healthineers Ag

The General Hospital Corporation

Uvo Hölscher

Ralf Kartäusch

Yan Zhang

David Grodzki

Dominik Paul

Thorsten Feiweier

Jürgen Nistler

Andreas Greiser

Alto Stemmer

Thorsten Speckner

Dieter Ritter

Mathias Nittka

Hubertus Fischer

Daniel Niederlöhner

Kun Zhou

Jonathan R Polimeni

Wilhelm Horger

Christoph Forman

Daniel Nico Splitthoff

Michael Köhler

George William Ferguson

Christian Wünsch

William Scott Hoge

Stephan Stöcker

Marc Beckmann

Volker Weißenberger

Peter Gall

Petra Bildhauer

Carsten Großhauser

Felix Horn

Yulin Chang

A trajectory is determined for inserting a patient into an MR scanner. An avatar representing specific body dimensions is provided. The avatar includes location information relating to an implant. A spatial magnetic field gradient data set relating to the scanner is provided. An avatar pose at a starting point of the trajectory is defined, and a course for the trajectory is provided. For several points on the trajectory, the corresponding magnetic field value are determined by combining the spatial magnetic field gradient data set with the avatar pose. The trajectory and/or the avatar pose are determined so that the at least one implant only passes regions within the MR scanner that are below a predetermined threshold value concerning the magnetic field gradient.

Method for determining a trajectory representing an inserting of a patient into an MR scanner

A magnetic resonance (MR) system compensation interface having: a hardware subinterface configured to receive individual hardware parameters from an individual scan unit of an MR system; a model determination unit configured to determine an imperfection model on the basis of the hardware parameters; a compensation model determination unit configured to determine a compensation model on the basis of the imperfection model; an application subinterface configured to receive application data assigned to an application; and a compensation unit configured to determine compensated application data on the basis of the received application data and the determined compensation model.

Compensation interface for a magnetic resonance imaging system

Eddy current induced magnetic fields (MF) are compensated in a magnetic resonance imaging system. An MR-sequence (M) includes a number of gradients. A dataset includes values of an amplitude and a time constant of eddy current fields of a number of gradients on at least one gradient axis. A number of points in time within the time period of the MR-sequence are defined. A number of constant currents are calculated for a number of coils of the magnetic resonance imaging system based on the dataset. The number of constant currents is designed to compensate at least at the one defined point in time (PT, PT). The calculated number of constant currents are applied on the related coils prior or during the application of the MR-sequence or a section of the MR-sequence.

Method and control unit for compensation of eddy current induced magnetic fields in magnetic resonance imaging

A reconstruction module may include at least one parameter interface to receive a set of measurement sequence parameters and a memory interface to a memory having a trained mathematical model stored in the memory. The trained mathematical model determines a results dataset containing at least one iterative denoising parameter and at least one edge enhancement parameter for at least one received measurement sequence parameter. A control of the reconstruction module controls a reconstruction of the medical images using a reconstruction algorithm based on the determined parameters for parameterizing an iterative denoising function and an edge enhancement function.

Reconstruction module and method for reconstruction of medical images

Techniques are disclosed for providing a process plan of a magnetic resonance examination incorporating n protocols where n&#x2265;1. The process plan includes selecting an examination strategy with a number n of metaprotocols and a chronological order of the n metaprotocols. Each of the n metaprotocols includes a protocol category having a plurality of different variants of a protocol of the one protocol category. The process plan further includes selecting a variant of a protocol of the one protocol category of an ith metaprotocol, where 1&#x2264;i&#x2264;n, repeating the step of selecting the variant of a protocol of the one protocol category of an ith metaprotocol until i=n, and providing the magnetic resonance examination process plan including the n protocols.

Method for providing a process plan of a magnetic resonance examination

Systems and methods include conversion of a first frame of k-space data acquired using a first initial readout polarity to first hybrid (k, y)-space data, conversion of a second frame of k-space data acquired using a second initial readout polarity to second hybrid (k, y)-space data, determination of a relationship between phase difference and y-position based on phase differences between a plurality of pixels located at k=a of first hybrid (k, y)-space data and a plurality of pixels at k=b of second hybrid (k, y)-space data, where a and b are constants, modification of the second hybrid (k, y)-space data based on the relationship, conversion of the modified second hybrid (k, y)-space data to a modified second frame of k-space data, generation of two single-polarity readout k-space frames based on the first frame of k-space data and the modified second frame of k-space data, and correction of a third frame of EPI image data based on the two single-readout polarity k-space frames.

Phase correction for echo-planar imaging

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 generating a spatially resolved magnetic resonance dataset using a coil arrangement includes providing at least one correction datum based on receiver characteristics of the coil arrangement. The method also includes providing a magnetic resonance dataset with spatially resolved signal intensity data, and correcting the at least one signal intensity datum in the magnetic resonance dataset by the correction datum before or after providing the magnetic resonance dataset.

Generating a spatially resolved magnetic resonance dataset

The disclosure relates to a method for processing movement signals detected during a magnetic resonance scan of a patient, and to a corresponding magnetic resonance device and a computer program product. According to the method, RF pulses are generated by a RF transmitting unit of a magnetic resonance device in order to excite nuclear spins in the body of the patient. Magnetic resonance signals are generated by the excited nuclear spins. For spatial encoding of the magnetic resonance signals, gradient pulses are generated by a gradient coil unit of the magnetic resonance device. The magnetic resonance signals are detected by a RF receiving unit of the magnetic resonance device. Furthermore, movement signals of the patient are detected by a movement detection unit during detection of the magnetic resonance signals, and these are processed by a processing unit.

Processing movement signals during a magnetic resonance scan

A method for setting a MRI sequence, a magnetic resonance device, and a computer program product are provided. The method includes providing, by a limitation unit, at least one limitation; providing, by a parameter provision unit, a plurality of parameters of the sequence, wherein at least one parameter of the plurality of parameters is assigned to a default parameter value; selecting, by a selection unit, a parameter of the plurality of parameters; determining, by a simulation unit, at least one sequential pattern based on at least one default parameter value of the default parameter values; determining, by an analysis unit, a permissible range of parameter values of the selected parameter based on at least one sequential pattern and the at least one limitation; and establishing, by an establishment unit, a new parameter value of the selected parameter within the permissible range of the parameter values.

Methods for setting a MRI sequence

Growing community of inventors

Erlangen, Germany

Uvo Hölscher