Abstract: An improved technique for recording of scan data is provided, which includes recording scan data from at least two slices of an examination object simultaneously by means of a magnetic resonance system. The technique includes selecting a desired simultaneous recording of scan data from at least two slices (S1, . . . , Sn), determining an artifact-preventing minimum RF pulse duration (dRF) for a desired recording, considering desired recording parameters (PA), and performing the desired recording using the determined minimum RF pulse duration.

Abstract: A method for calculating an operating parameter of a magnetic resonance sequence, a magnetic resonance apparatus, and a computer program product are disclosed. According to the method, at least one initial sequence parameter of a radio-frequency (RF) transmit pulse of the magnetic resonance sequence is provided. In addition, at least one test RF transmit pulse is determined, (e.g., calculated and/or modeled and/or simulated), wherein the at least one test RF transmit pulse is adapted based on the at least one initial sequence parameter to a specified, in particular geometric, standard shape. The at least one operating parameter is determined, (e.g., calculated), with the assistance of the at least one test RF transmit pulse. It is in particular assumed in this respect that the at least one test RF transmit pulse is applied on performance of the magnetic resonance sequence.

Abstract: Accelerated acquisition of scan data by means of magnetic resonance to enable short echo times so that scan data of substances can also be acquired with a transversal relaxation time.

Abstract: Techniques for optimizing protocol parameters of an MR protocol are provided. The techniques provides for a combined safety/operability test gradient-specific gradient factors Fx already determined prior to the performance of a test on an MR protocol and noise optimization of the MR protocol by means of a noise optimization method are used, with adjusted protocol parameters determined after the determination of the gradient-specific gradient factors Fx via a test performed on the MR protocol, in the creation of an adjusted MR protocol. As a result, valuable computing time for the combined testing and optimization is saved, since multiplication of the parameter space of both the methods can be omitted. A method for the combined testing and noise optimization is herewith greatly accelerated by the use of pre-prepared gradient information, e.g. in the form of gradient factors.

Abstract: A method for operating a magnetic resonance apparatus, a magnetic resonance apparatus, and a computer program product are provided. According to the method, an initial MR scan protocol is provided. At least one boundary condition, such as a performance-limiting boundary condition, that is dependent on the patient and/or the MR apparatus is provided. Based on the initial MR scan protocol, at least two sub-protocols are generated. Each of the at least two sub-protocols is checked as to whether the at least one boundary condition is complied with when the respective sub-protocol is applied.

Abstract: A method for operating a higher-level automated vehicle (HAV), in particular a highly automated vehicle, is provided, including: S1 for providing a digital map, which may be a highly accurate digital map, in a driver assistance system of the HAV; S2 for determining an instantaneous vehicle position and localizing the vehicle position in the digital map; S3 for providing an expected setpoint traffic density at the vehicle position; S4 for ascertaining an instantaneous actual traffic density in the surroundings of the HAV; S5 for comparing the actual traffic density to the setpoint traffic density and ascertaining a difference value as the result of the comparison; S6 for checking the vehicle position of the HAV for plausibility at least partially based on the difference value and/or S7 for updating the digital map at least partially based on the difference value. Also described are a corresponding driver assistance system and a computer program.

Abstract: Techniques are disclosed for use in magnetic resonance imaging (MRI) for exciting spins of a first material and spins of a second material. A first spin echo signal is acquired when the excited spins include a first phase difference, which is given by ?, and a second spin echo signal is acquired when the excited spins of the first material and the excited spins of the second material include a second phase difference, which is given by ??. An absolute value of ? lies within the interval ]0,?[. A first image for the first material and/or a second image for the second material is generated by a computing unit depending on the first spin echo signal and the second spin echo signal.

Abstract: Method for operating an MR device to acquire MR data slices, wherein in a sequence section of an MR sequence, MR signals of at least two slices are measured simultaneously, and an acquisition order having an association of slices to respective sequence sections of a repetition sequence covering all slices of an associated concatenation is determined using an ordering rule. A crosstalk criterion is evaluated for the acquisition order by checking whether a first slice acquired in a last sequence section of the repetition sequence is directly adjacent to a second slice acquired in a first sequence section of the same repetition sequence. If the crosstalk criterion is fulfilled, the acquisition order is adapted according to an adaptation rule such that a larger temporal acquisition distance between the acquisition of the first and the second slices is provided.

Abstract: In a computer-implemented method for setting a field of view for a magnetic resonance scan, exclusion information describing a region of the original field of view that is unmapped owing to the distortion is ascertained on the basis of the distortion map for at least one first set of field-of-view parameters describing a rectangular or cuboidal original field of view, the exclusion information is used to determine a second set of field-of-view parameters to be used for the magnetic resonance scan, and the magnetic resonance scan is performed using the second set of field-of-view parameters.

Abstract: A method serves for MR-based reconstruction of images of a patient. Whether a value of a movement of the patient in at least one motion direction during an MR scan exceeds a respective threshold value is monitored. If this is not the case, an image reconstruction is performed by a Wave-CAIPI method on the basis of identical calibrated PSF subfunctions for all k-space lines. When this is the case, a number of bins are provided that correspond to sequential value ranges of the patient movement in at least one motion direction, the k-space lines are assigned to the bins based on a movement value determined during their respective acquisition, a calibration of PSF subfunctions is performed for at least two bins on the basis of the k-space lines assigned to said bins, and an image reconstruction is performed by a Wave-CAIPI method in such a way that the PSF subfunctions associated with the assigned bins are used for the respective k-space lines.

Abstract: The disclosure relates to techniques for determining an acquisition order identified with an acquired magnetic resonance data set, which comprises a total number of slices, using a simultaneous multislice technique.

Abstract: Acquisition of MR data with a compressed sensing technique in a volume section includes ascertaining an extent of magnetic field distortion within the volume section. A first gradient along a first direction is switched. An RF excitation pulse is radiated for selective excitation of a slice in the volume section while the first gradient is switched. The MR data is acquired in a volume of the volume section that is composed of the slice, a partial volume above the slice, and a partial volume below the slice by executing the following multiple times: switching a first phase-encoding gradient along a second direction; switching a second phase-encoding gradient along the first direction; and reading out the MR data in a k-space line while a readout gradient is switched along a readout direction. A set of k-space lines to be read out for the volume is determined in dependence on the extent.

Abstract: A method for avoiding artifacts in image data reconstructed from measurement data acquired by means of a TSE (turbo spin echo) sequence with a coil having a plurality of antenna elements associated with one channel respectively. The method includes loading the measurement data, acquired with the coil, of all channels of the coil; loading at least the first three echo signals respectively of an echo train from phase correction measurement data of all channels acquired with the coil in relation to the TSE sequence; determining a step value d for each channel of the coil from the loaded phase correction measurement data, which value describes a signal drop in the three successive echo signals of the phase correction measurement data; channel-by-channel manipulation of the measurement data as a function of the step value of the respective channel; and reconstructing image data by taking into account the manipulated measurement data.

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: Techniques are disclosed for positioning a patient couch in a patient receiving area of a magnetic resonance device for a magnetic resonance examination, which includes starting an introduction of the patient couch into the patient receiving area, acquiring monitoring data within an acquisition area of at least one sensor unit by means of the at least one sensor unit during the introduction of the patient couch into the patient receiving area, evaluating the monitoring data with respect to a selected area of an examination object and/or a selected area of the patient couch, and positioning the patient couch within the patient receiving area in dependence on an acquisition of the selected area of the examination object and/or the selected area of the patient couch in the monitoring data.

Abstract: A method for operating a magnetic resonance facility in which a measurement gradient pulse is used to record magnetic resonance signals for sampling k-space along a trajectory section. The recorded magnetic resonance signals are assigned to k-space points using a shape function describing the time profile of the measurement gradient pulse. To correct deviations of the real time profile of the measurement gradient pulse from an assumed target profile, a first correction measurement is performed to ascertain first magnetic resonance signals of the trajectory section. A second correction measurement is then performed using a reference sampling pattern or a reference gradient pulse with fewer deviations from an assigned reference target profile. If a deviation criterion is met, a correction function for the shape function is ascertained by aligning the first and second magnetic resonance signals to one another, providing correction information to be used in an imaging measurement.

Abstract: A method of manufacturing a housing and a housing for an inductive sensor having at least one sleeve-like housing part and at least one beaker-like end cap for a sensor element, wherein the beaker-like end cap, wherein the end cap is composed of plastic, wherein the end cap is arranged in the sleeve-like housing part, wherein the end cap has a peripheral annular pressing surface that has an excess size with respect to an inner diameter of the housing part along an outer diameter of the sleeve-like section so that a press fit is formed between the sleeve like housing part and the end cap, and wherein a jacket-like outer surface of the sleeve-like section of the end cap does not have a step that projects beyond the inner diameter of the sleeve-like housing part.

Abstract: A method a for acquiring magnetic resonance data of an object under examination by means of a magnetic resonance system comprises: in an excitation phase, applying an RF excitation pulse; in a wait phase following the excitation phase, applying at least one first RF refocusing pulse after the applied RF excitation pulse according to a first echo spacing; in an acquisition phase following the wait phase, applying at least two further RF refocusing pulses to generate echo signals according to a second echo spacing, wherein the second echo spacing is smaller than the first echo spacing; and reading out the echo signals generated in the acquisition phase as magnetic resonance data from which image data can be reconstructed, wherein in the wait phase at least two spoiler gradients are switched in the readout direction.

Abstract: An adaptive reconstruction of MR data, including acquired MR data of a core region having core segments and simulated MR data of a peripheral region. The method includes ascertaining a peripheral signal based on the MR data of the peripheral region, determining a scaling factor for each core segment by taking into account the peripheral signal and a mean signal intensity of the MR data for the respective core segment, scaling the MR data of the core region by taking into account the MR data of each core segment and that of the scaling factor corresponding to the respective core segment, generating filtered MR data by combining the scaled MR data of the core region with the MR data of the peripheral region, and reconstructing image data from the filtered MR data.

Abstract: A method is provided for monitoring a current respiratory curve of a patient with regard to a recording region which is imaged by magnetic resonance scanning. The method includes acquiring a reference respiratory curve of the patient over a plurality of respiratory cycles; establishing a respiration state of the patient that is suitable for the magnetic resonance scanning based on the reference respiratory curve; determining at least one reference recording time window and a trigger threshold value for starting a magnetic resonance scan based on the previously determined respiration state; carrying out at least one magnetic resonance scan within the determined reference recording time window of the current respiratory curve using the trigger threshold value; and continually acquiring and monitoring the current respiratory curve during the magnetic resonance scan in the reference recording time window.