Abstract: Permitted gradient intensities are established to prevent an overloading of a gradient unit of a magnetic resonance system during a recording, with the magnetic resonance system, of scan data from an examination object situated in a scan volume of said magnetic resonance system.

Abstract: In method for MR imaging, an MR signal is acquired for each of a plurality of readout gradient pulses during a respective readout period and an MR image is generated on the basis thereof. A start time of the respective readout period relative to a start time of the respective readout gradient pulse is delayed by a delay duration which is selected randomly or pseudo-randomly from two or more predefined time values, and/or to generate the MR image, the acquired MR signals are processed, wherein the processing includes a frequency conversion based around a center frequency which is randomly or pseudo-randomly selected from two or more predetermined frequency values.

Abstract: 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.

Abstract: One or more example embodiments relates to a linear drive apparatus for converting a rotational movement into a linear movement.

Abstract: In a method for recording measurement data of an examination object, by a MR system using an echo planar recording technique that is segmented into at least two segments in the readout direction that also records navigator data (ND) for each of its segments, sampling patterns are changed during recordings of ND, so that the ND can be recorded overall such that reference data for determining further information for improving the recorded measurement data can be generated from the ND. The navigator phases of the recording technique segmented in the readout direction may be used to determine further information. The sampling patterns can be changed depending on the type of desired information and associated reference data. Separate measurements for reference measurements that are otherwise necessary for determining the desired information can be omitted, whereby a time period that is required for the entire measurement can be reduced.

Abstract: A method for creating measurement data of an object for examination located in a measurement volume of a magnetic resonance system, including: a) increasing a gradient until it has reached a first strength in an encoding direction; b) irradiating an RF excitation pulse while the gradient has the first strength; c) after the end of the RF excitation pulse, reducing the strength of the gradient; d) increasing the gradient again until it has reached a desired strength in the encoding direction; and e) recording MR signals generated by the RF excitation pulse as measurement data along a k-space trajectory specified by the gradient present during the recording and storing this measurement data in a measurement data set, the gradient having the desired strength during the recording of the measurement data.

Abstract: Measurement data of an examination object is recorded as collapsed from a plurality of slices of the examination object simultaneously while using an in-plane acceleration technique with an undersampled sampling pattern of the k-space. The measurement data is separated into single-slice measurement data by recording reference measurement data in at least two segments such that a complete set of reference measurement data is recorded. A sampling pattern is used within a segment during the recording of the reference measurement data that corresponds to an acceleration factor to which the sampling pattern of the collapsed measurement data corresponds. The collapsed measurement data is recorded, and the separation of the data is performed based upon on the reference measurement data recorded in at least one of the at least two segments. The separation of the collapsed measurement data is recorded into single-slice measurement data while using the created separation data.

Abstract: The present disclosure relates to a coil assembly, an MRI system, and a tuning method. The coil assembly comprises at least one stretchable RF receiving coil element, respectively comprising a variable capacitor, the variable capacitor being used to adjust a resonant frequency of the corresponding stretchable RF receiving coil element; and a tuning controller, at least configured to adjust a capacitance of the respective variable capacitor of the at least one stretchable RF receiving coil element, so that the resonant frequency of the at least one stretchable RF receiving coil element is within a preset range. The stretchable RF receiving coil element may be adjusted to a resonant state by means of a simple structure.

Abstract: A wireless transmission device for an MR imaging apparatus, including: a transmitting coupler with a transmitting coil array including one or more first transmitting coils arranged in a first local coil device and to transmit a first intermediate frequency signal, the first local coil device being located on a patient couch and below an examined portion of a subject, wherein the first intermediate frequency signal is generated based on a first magnetic resonance signal received by the first local coil device from the subject; and a first receiving coupler including a first receiving coil array, the first receiving coil array including one or more first receiving coils, located below a trajectory of the patient couch sliding over the magnetic resonance main body, and configured to receive the first intermediate frequency signal from the transmitting coil array in response to the transmitting coil array overlapping with the first receiving coil array.

Abstract: The reconstruction network is a variational network configured to reconstruct images from cine MRI data. The reconstruction network comprises an architecture with a cascade of cascade modules. The input of the first cascade module is an input-stack of a plurality of N frames and the input of each following cascade module is the input-stack and an output-stack of the preceding cascade module. The reconstruction network further includes a selection unit configured to select a single frame being processed by the cascade modules that corresponds to the i-th frame of the input stack as the basis for the output dataset.

Abstract: A computer-implemented method for scattered radiation correction, comprises: receiving a plurality of projection images mapping an object; receiving or determining a virtual three-dimensional reference image mapping the object; determining at least one scattering model; subtracting the at least one scattering model from the projection images to determine corrected projection images; determining a corrected medical image as a function of the corrected projection images; comparing the corrected image with the virtual reference image; and checking whether an abort criteria is met. If the abort criteria is met, then the corrected medical image is provided. If the abort criteria is not met, then the at least one scattering model is adapted and the method is repeated based on the adapted scattering model.

Abstract: A computer-implemented method for reducing an X-ray dose applied on a subject during a respiration-correlated computed tomography scan includes determining a beginning of a data-redundant breathing phase during a beam-on period of the scan; applying a redundancy modulation to the applied X-ray dose such that the X-ray dose is reduced during the data-redundant breathing phase; determining an end of the data-redundant breathing phase; and continuing the scan without a redundancy modulation of the X-ray dose at the end of the data-redundant breathing phase.

Abstract: A medical device has a base body on a delimiting surface of a room. The medical device furthermore has an additional body supported pivotably about a pivot axis on the base body. Thus, by pivoting the additional body about the pivot axis, it is possible to set a rotational position of the additional body relative to the base body. The additional body directly or indirectly carries a radiation source for emitting ionizing radiation. A data transmission element is on each of the base body and on the additional body in each case. The data transmission elements are arranged flush on the base body and on the additional body with respect to the pivot axis and are spaced apart from one another, seen in the direction of the pivot axis.

Abstract: A patient couch is disclosed. In an embodiment, the patient couch includes a docking facility for mechanical docking on a docking point of a medical imaging installation; a drive unit including a plurality of wheels for a drive movement of the patient couch up to a docking position, where the docking facility reaches the docking point; at least one sensor, to acquire sensor signals characterizing a relative position between the medical imaging installation and the patient couch; a computing unit to calculate a movement trajectory with a destination of the docking position for the patient couch, based on the sensor signals acquired; and a display facility, to display the movement trajectory calculated for a user.

Abstract: A trustworthy component for a control path of a magnetic resonance apparatus and a magnetic resonance apparatus with at least one trustworthy component are provided. The trustworthy component is configured to be arranged in a control path of a safety-relevant function of a magnetic resonance apparatus, so that when the trustworthy component is arranged in the control path, the control path is, at least in parts, non-trustworthy.

Abstract: The disclosure relates to techniques for determining a motion parameter of a heart. A subset of a sequence of cardiac MR images is applied as a first input to a first trained convolutional neural network configured to determine, as a first output, a probability distribution of at least 2 anatomical landmarks. The sequence of cardiac MR images is cropped and realigned based on the at least 2 anatomical landmarks to determine a reframed and aligned sequence of new cardiac MR images showing the same orientation of the heart. The reframed and aligned sequence of new cardiac MR images is applied to a second trained convolutional neural network configured to determine, as a second output, a further probability distribution of the at least 2 anatomical landmarks in each new MR image of the reframed and aligned sequence, the motion parameter of the heart is determined based on the second output.

Abstract: 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.

Abstract: In a method for operation of a docking arrangement, position information is determined that describes a position of the patient table, including detecting, sensor data corresponding to: the position of the patient table relative to the docking arrangement, and/or to an environment feature describing a movement trajectory to the docking arrangement. The method may further include performing, in response to a switchover condition indicative of a handover situation and a purely manual operation of the patient table by an operator, a switch into an assistance operating mode of the docking arrangement. In the assistance operating mode, at least one guidance measure may be determined for the patient table and a functional component of the patient table may be controlled to assist the operator.

Abstract: An operating console of a medical device has input elements configured to generate electrical control signals as a result of actuation of the input elements by an operator of the medical device. The operating console has an analysis apparatus, which is connected to the input elements to receive the electrical control signals. The analysis apparatus is configured to determine control commands configured to drive the medical device based on the electrical control signals. It has an interface configured to output the control commands to the medical device. The operating console has a number of sensors configured to detect electromagnetic interference signals from the area surrounding the operating console. The analysis apparatus is connected to the sensors to receive characteristic quantities for the electromagnetic interference signals detected by the sensors. It is configured to process the characteristic quantities.

Abstract: A method for providing a text summary for a medical image data set comprises: receiving the medical image data set of a patient; identifying at least one compartment in the medical image data set; accessing supplementary information associated with the patient in a medical information system; providing a text generation function configured to provide, for a specific compartment, a natural language text summary summarizing medical information pertaining to the specific compartment; applying the text generation function to the supplementary information to generate a text summary for the at least one compartment; and providing the text summary to a user via a user interface.