Abstract: The disclosure relates to gradient delay time correction of magnetic resonance data. For recording the magnetic resonance data, use is made of a three-dimensional recording technique with linear recording trajectories oriented in different readout directions of a readout plane that is perpendicular to a partition direction. Calibration data is recorded which covers a plurality of partitions in partition direction and which describes readout-direction-dependent shifts, caused by delay effects, of measurement points, e.g. sampled k-space sections in the k-space. Correction data is determined by evaluating the calibration data, and the magnetic resonance data is corrected on the basis of the correction data in order to compensate for the delay effects. The calibration data, which covers a coverage region in partition direction, is recorded in a resolved manner in partition direction, and at least one acceleration technique is applied in the partition direction during the recording of the calibration data.

Abstract: A computer-implemented method for gradient delay time correction of MR data using an MR device, wherein the magnetic resonance data is recorded using a three-dimensional recording technique with linear recording trajectories which are oriented in different readout directions of a readout plane that is perpendicular to a partition direction. The method includes: in a calibration measurement using the magnetic resonance device, recording calibration data which describes readout-direction-dependent shifts, caused by delay effects, of measurement points in the k-space; determining correction data by evaluating the calibration data; correcting the MR data based on the correction data in order to compensate for the delay effects, wherein the calibration data, which covers a coverage region in partition direction is recorded in a resolved manner, and the correction data is determined and applied in a manner that is dependent on partition direction.

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: The method for generating a resultant image comprises: defining curved slices between a compression plate and a detector, each curved slice having a shape that follows a curvature of the compression plate and/or detector or that represents a transition between the curvatures; reconstructing slice images that lie on the curved slices; generating the resultant image as a slice stack of the slice images; and outputting the resultant image.

Abstract: A gradient system for a magnetic resonance device, configured to, when arranged in use in the magnetic resonance device, generate a variable magnetic gradient field in a scanning region of the magnetic resonance device. The gradient system includes a first magnetic assembly configured to generate a first magnetic gradient field contribution to the magnetic gradient field. The first magnetic assembly includes one or more components configured to, in use, act as respective non-electric magnets to generate the first magnetic gradient field contribution. A positioning unit is configured to adjust a position and/or orientation, relative to the magnetic resonance device, of the first magnetic assembly and/or of one or more of the components of the first magnetic assembly to adjust the first magnetic gradient field contribution and thereby to vary the magnetic gradient field.

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

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: 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: 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: 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: 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: 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: 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 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 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.