Abstract: To operate a magnetic resonance tomography system, first analysis signals are received by a main receive antenna and an auxiliary receive antenna. Based thereon, a first interference source and first weighting factors are determined. Second analysis signals are received by the main receive antenna and the auxiliary receive antenna and in accordance with the first weighting factors, a combination of the second analysis signals is created. Based thereon, a second interference source is determined. Second weighting factors are determined in order to suppress the influence of the first interference source and an influence of the second interference source. A magnetic resonance signal is received during an examination phase by the main receive antenna and an interference signal by the auxiliary receive antenna. An interference-suppressed magnetic resonance signal is created as a combination of the magnetic resonance signal and the interference signals depending on the second weighting factors.

Abstract: 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.

Abstract: A method for suppressing interference signals during an image acquisition with a magnetic resonance tomography scanner that has an antenna and an interference signal sensor is provided. The magnetic resonance tomography scanner receives a reference interference signal via the interference signal sensor, receives a magnetic resonance signal via the antenna, and reduces a portion of an interference signal in the magnetic resonance signal as a function of the reference interference signal. During the reduction of the interference signal, the method takes into account the fact that the reference interference signal also has a signal portion of the magnetic resonance signal.

Abstract: Method for optimizing an MR control sequence for acquiring MR data of an examination subject by means of an MR device having gradient coils. The method includes providing an MR control sequence having sequence portions, each having an excitation portion, a phase encoding portion and a readout portion, wherein the phase encoding portion is arranged in each case between the excitation portion and the readout portion with respect to time; providing a defined parameter for the MR control sequence; providing an optimization objective; ascertaining usage time of the gradient coils between the excitation portion and the readout portion with respect to time for each of the sequence portions; optimizing the excitation portions for each of the sequence portions considering the ascertained usage time for the corresponding sequence portion and the defined parameter with regard to the optimization objective; and providing the optimized MR control sequence having the optimized excitation portions.

Abstract: 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.

Abstract: A pilot tone device for acquiring physiological data of a patient and a magnetic resonance tomography system with a corresponding pilot tone device are provided. The pilot tone device has a pilot tone transmitter that is designed to transmit a pilot tone in an ISM band.

Abstract: A magnetic resonance tomography scanner with a noise suppressor for suppressing interferences of reception and a method for operation of the magnetic resonance tomography scanner are provided. The noise suppressor receives an interference signal with a sensor, determines a noise suppression signal with a noise suppression controller, and sends the noise suppression signal using a controllable radio frequency amplifier via a transmit antenna, so that the interference signal on a receive antenna of the magnetic resonance tomography scanner is reduced.

Abstract: 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.

Abstract: Automated setting techniques for MR imaging with ultra-short echo times in a region to be examined are described. With the method protocol parameter values for an MR imaging method are determined. The protocol parameters comprise a predetermined imaging resolution. Optimized values for echo time and bandwidth are also determined based on an image signal simulation, which is based on the determined protocol parameters. The signal to noise ratio and point spread function are used as optimization criteria.

Abstract: In a method and magnetic resonance imaging apparatus having a scanner that for acquires a magnetic resonance dataset, a magnetic resonance sequence is provided to a computer and is converted in the computer into a digital sequence execution signal that includes a target gradient waveform in the form of a time-discrete target gradient signal the computer calculates a pre-GIRF gradient signal by applying a digital pre-emphasis filter to the target gradient signal. The computer transmits the pre-GIRF gradient signal to the magnetic resonance system scanner and) the scanner executes the digital sequence execution signal containing the pre-GIRF gradient signal in order to acquire magnetic resonance raw data.

Abstract: A method is for classifying a risk for thrombus formation in an organ, in particular during an atrial fibrillation. In an embodiment, the method includes providing a medical image data set via a medical imaging device; calculating a flow parameter based on the medical image data set; assigning a risk parameter based on the flow parameter calculated; and—providing the risk parameter.

Abstract: The disclosure relates to a magnetic resonance tomography unit with a control unit for controlling an image acquisition. The control unit has an interface for a signal-carrying connection to a disturbance source. The control unit is configured to synchronize an image acquisition by an information exchange with the disturbance source.

Abstract: The disclosure relates to a magnetic resonance tomography scanner and to a method for operating the magnetic resonance tomography scanner. The method includes determining a B0 field map. The method further includes determining an excitation of the nuclear spins to be achieved and a spectrally selective excitation pulse for transmission by a transmitter by way of an antenna as a function of the B0 field map. In the method, the excitation pulse is configured here to generate the excitation of the nuclear spins to be achieved in the patient. The excitation pulse is then output by way of the antenna.

Abstract: In a method for MRI where k-space describing spatial frequencies in an acquisition volume (AV) is scanned, a first measured data acquisition is performed in the AV with a first gradient field strength of a gradient field, including irradiating a RF pulse into the AV and acquiring a first series of measured values spaced apart temporally, a second measured data acquisition is performed with a second, different gradient field strength, including irradiating a RF pulse into the AV and acquiring a second series of measured values spaced apart temporally. With the first measured data acquisition, the first measured values for a respective response signal are acquired at a first time interval from one another and with the second measured data acquisition, the second measured values for a respective response signal are acquired at a second, different time interval from one another.

Abstract: In a Method and a device for magnetic resonance imaging of a subject using a spoiled gradient echo sequence, a B0 magnetic field strength of at most 1.5 T is used during the sequence. As part of the sequence a slice select gradient acting as a spoil gradient is played out. Substantially simultaneously with the slice select gradient a predetermined RF pulse is played out in the sequence, wherein a time-bandwidth product of the RF pulse is set so that a majority of the energy of the RF pulse is transmitted in its central main lobe.

Abstract: In a method for operating a magnetic resonance (MR) apparatus, MR raw-data is acquired from an acquisition region of a patient for a sampling region of k-space using a MR sequence that employs ultrashort echo times; a first MR image dataset is reconstructed from the MR raw-data of the k-space region; a second MR image dataset is reconstructed from the MR raw-data in a central subregion of the sampling region in k-space; a resolution of the second MR image dataset is interpolated to increase the resolution of the second MR image dataset to a resolution of the first magnetic resonance image dataset; and the first and second MR image datasets are combined to obtain an output MR image dataset.

Abstract: In a method and medical imaging apparatus for determining a feature characterizing intentional breath-holding by an examination object for acquiring medical raw data with breath-holding algorithm, an algorithm, the algorithm being designed to allocate at least one feature characterizing intentional breath-holding to at least one physiological property. The algorithm includes or accesses trained artificial neural network. A physiological property of the examination object is detected during free breathing of the examination object. The feature characterizing intentional breath-holding by the examination object is determined by the computer, by executing the algorithm with the detected physiological property of the examination object, as an input to the algorithm.

Abstract: In a method for performing a magnetic resonance measurement of an organ structure of a patient using a magnetic resonance imaging system adapted to the imaging of the organ structure: a correct positioning of the organ structure of the patient is ascertained, a correct positioning of the magnetic resonance imaging system with regard to the positioning of the organ structure of the patient is ascertained, a magnetic resonance scanning protocol is selected, a spatial coverage of the magnetic resonance measurement with regard to the organ structure to be imaged is adjusted, and the magnetic resonance measurement is performed to acquire magnetic resonance image data of the organ structure.

Abstract: In a system and method for performing MR image reconstruction based on acquired MR measurement data of an organ structure of a patient, the MR measurement data of the organ structure is received, a-priori information about the organ structure from which the MR measurement data have been acquired is received, MR image reconstruction is performed based on the MR measurement data and taking into account the a-priori information, and the reconstructed MR image data is provided.

Abstract: A method for compiling a dental overview map of the dentition of an examination object on the basis of magnetic resonance (MR) data from a MR measurement of the dentition. An MR measurement for acquiring MR data if performed from the dentition. An analysis of sections of the dentition is performed in order to determine an abnormality on the basis of the MR data, wherein a section of the dentition includes a subset of the number of teeth in the dentition, and an abnormality is determined in at least one section. A dental overview map is compiled as a function of the MR data and the abnormality of the at least one section of the dentition. The dental overview map is provided. Also, an MR apparatus with a computer, and a computer program product directly loadable into a data storage device of a computer of an MR apparatus in order to carry out the method.