Siemens Healthcare Gmbh

Siemens Aktiengesellschaft

Daniel Nico Splitthoff

Thorsten Feiweier

Dominik Paul

Andreas Greiser

Thorsten Speckner

Bernd Kuehn

Peter Speier

Swen Campagna

Thomas Benner

David Grodzki

Michael Wullenweber

Stephan Stoecker

Thomas Loeffler

Flavio Carinci

Mathias Nittka

Josef Pfeuffer

Himanshu Bhat

Tobias Kober

Johann Sukkau

Jan Ole Blumhagen

Simon Bauer

Volker Schnetter

Carsten Prinz

Uvo Hölscher

Peter Gall

Felix Wolf

Jens Thoene

Stephan Stöcker

In a method and apparatus for generating a magnetic resonance data record, at least two excitation cycles are executed, wherein, in each excitation cycle, at least one magnetic resonance signal is recorded, using different phases with a first radio-frequency pulse in two consecutive excitation cycles, with at least one dephasing gradient being applied in an excitation cycle.

Method and apparatus for generating a magnetic resonance data record

In a magnetic resonance imaging apparatus and a method for the operation thereof, a diagnostic magnetic resonance imaging sequence is selected in a control computer of the apparatus, and an adjustment parameter for the selected sequence is acquired in the control computer, which is specific to the subject under examination. A limit value for a loading parameter of the subject is specified in the computer, and a parameter range for an imaging parameter of the sequence is determined in the computer on the basis of the acquired adjustment parameter and the specified limit value for the loading parameter. A planning environment for the magnetic resonance imaging of the subject is presented, in which only the determined parameter range can be set for the imaging parameter.

Method and magnetic resonance imaging apparatus for providing a planning environment for magnetic resonance imaging

The disclosure relates to simulating an electrical stimulation during an examination of an examination object, in which the examination object is examined in a MR system to create a MR image using an imaging sequence, where a time characteristic of at least one magnetic field gradient used during the imaging sequence is determined, a time derivative of the time characteristic of the at least one magnetic field gradient is determined, and change time points at which the value of the time derivative changes are determined. The simulation of the electrical stimulation for the imaging sequence is performed, wherein the simulation is restricted to the determined change time points.

Calculation of stimulation values in magnetic resonance tomography

A medical imaging apparatus has a data acquisition scanner having a patient receiving zone at least partially enclosed by the scanner, and at least one acquisition unit equipped with a camera to acquire positional data. The at least one acquisition unit has a first imaging optics system and at least one second imaging optics system that differs from the first imaging optics system with regard to at least one optical property or attribute that affects the acquisition of the positional data.

Medical imaging apparatus

The disclosure relates to a method for determining a sequence information element of a magnetic resonance sequence, a computer program product and an evaluation unit for performing such a method, and also a magnetic resonance device having such an evaluation unit. The method includes a determination of the sequence information element based on at least one pattern of the magnetic resonance sequence.

Recognition of repetition patterns in MR sequences

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

In a method and apparatus for recording a magnetic resonance dataset of a volume of interest of an object, at least one gradient moment is calculated as a function of at least one jump in susceptibility that is present in the volume of interest, between two sections of the volume of interest. An excitation pulse is radiated and at least one compensation moment is activated in a part volume of the volume of interest, for the at least partial compensation of a gradient moment caused by the jump in susceptibility. The signal generated by the excitation pulse is read out.

Method and magnetic resonance apparatus for acquiring magnetic resonance dataset with reduced susceptibility artifacts in the reconstruction image

In order to enable improved analysis of a magnetic resonance sequence, which provides a number of radio-frequency pulses for the acquisition of magnetic resonance measurement data of an object undergoing investigation by a magnetic resonance apparatus, the magnetic resonance sequence is provided to a computer and a first average radio-frequency output that is present during a first time window of the magnetic resonance sequence is determined. A second average radio-frequency output that is present during a second time window of the magnetic resonance sequence is determined. A value derived from the first average radio-frequency output and the second average radio-frequency output is provided from the computer.

Method, computer and magnetic resonance apparatus

In a method and a magnetic resonance system for fat saturation when acquiring magnetic resonance data in a predetermined volume segment of an examination object, a SPAIR pulse is emitted and an RF excitation pulse is emitted following a predetermined time period after the SPAIR pulse, and magnetic resonance data are thereafter acquired. The time period of at least one slice is set so as to be different from the time period for the remaining slices.

Method and magnetic resonance system for fat saturation

In a magnetic resonance apparatus and an operating method therefore, a data acquisition sequence for operating the apparatus is repeatedly reviewed in a number of ascertainment passes executed in a processor, each ascertainment pass involving a calculation step, and in each calculation step a determination is made as to other respective values of data elements used in a previous calculation step have changed. If no change has occurred, a re-calculation in the current calculation step is not implemented, thereby reducing the time and computing capacity that are needed to generate a final data acquisition sequence.

Magnetic resonance apparatus and operating method therefor

A method for automatically and dynamically optimizing image acquisition parameters/commands of an imaging procedure performed by a medical imaging apparatus in order to mitigate or cancel dynamic effects perturbing the image acquisition process of an object to be imaged by the medical imaging apparatus. The method includes connecting a dynamic correction module (DCM) to the medical imaging apparatus, automatically acquiring by the DCM image acquisition parameters/commands and data about dynamic changes or effects, and automatically determining in real time, by the DCM, at least one new image acquisition parameter/command from the image acquisition parameters/commands defined in the imaging control system and the dynamic change data, while the image acquisition parameter/command defined in the imaging control system remains unchanged. The method further includes automatically providing, by the DCM, the new image acquisition parameter/command to the hardware control system.

Method and device for dynamic effects correction in medical imaging

In a method for operating a medical imaging examination apparatus having multiple subsystems controlled by a control computer in a scan sequence, a control protocol for the scan is provided to the control computer, which determines sequence control data for the control protocol that define different functional subsequences of the scan, with different effective volumes assigned to each functional subsequence. Current ambient conditions of the apparatus are determined that are decisive for the determined relevant sequence control data and associated effective volumes. Control signals for the scan are determined from the sequence control data, the effective volumes and the current ambient conditions determined that optimize the functional subsequences of the scan.

Medical imaging apparatus having multiple subsystems, and operating method therefor

In a method for operating a medical imaging examination apparatus having multiple subsystems, current ambient conditions in a scan volume of the apparatus are determined and stored in a global ambient condition parameter set. A control computer starts a scan sequence according to a selected scan protocol, and sequence control data that define different functional sub-sequences for the respective subsystems are provided to the control computer. Different effective volumes are assigned to each functional sub-sequence, and respective current sub-regions in the effective volume associated with the respective sub-sequence are determined, in which a volume optimization is to take place. Control signals for the scan sequence are calculated using the sequence control data, the global ambient condition parameter set, and the determined current sub-regions of the affected volumes, in order to optimize the functional sub-sequences at least with regard to the current sub-region of the assigned effective volume.

In a method for operating a medical imaging apparatus having subsystems, a control protocol assigned to a scan sequence to be performed is provided to a control computer that determines sequence control data for the control protocol, which define different functional subsequences of the scan sequence. Different effective volumes are assigned to each functional subsequence, and current ambient conditions of the apparatus are determined for the sequence control data and associated effective volumes, for a series of states of physiological processes that occur during the scan sequence. Control signals for the scan sequence are determined from the sequence control data, the effective volumes and the current ambient conditions per observed state, that optimize the functional subsequences of the scan sequence locally. During the scan, at least one current state of the observed physiological processes is determined and the control signals used for the ongoing scan are determined from the stored control signals, dependent on the at least one current state.

In a method for determining time windows in a scan sequence, in which values of setting parameters of a scan can be changed during a current scan without adversely affecting the scan data obtained with the scan, comprising the following a scan sequence is loaded into a control computer, that then determines the time windows in the scan sequence in which values of setting parameters can be changed during a current scan, on the basis of an analysis of useful coherences in the scan sequence. The determined time windows are stored or processed so as to be available to operate an imaging apparatus to execute the scan sequence.

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Erlangen, Germany

Daniel Nico Splitthoff