Abstract: In a method and apparatus for recording magnetic resonance data for determining at least one parameter map describing a material parameter in the scanning region, the scanning area having a number of slices, a slice-specific preparation pulse is used, wherein magnetic resonance data are scanned after different waiting times following the preparation pulse. Magnetic resonance data of different waiting times are acquired from at least two slices, by determining an overall pulse by overlaying the slice-specific preparation pulses for the individual slices, and then activating the overall pulse to read out the magnetic resonance data of the slices with a readout sequence after the respective waiting times.

Abstract: In a method and apparatus for generating magnetic resonance (MR) measurement data of an object, (a) a multiband RF excitation pulse is radiated into the object to simultaneously selectively excite at least two slices, which do not overlap, in the object, and (b) echo signals generated are read out with at least two reception coils and are stored in a measurement data record, and (c) after reading out a last echo signal that follows from the multiband RF excitation pulse, a driven equilibrium module is radiated that includes at least one further multiband RF pulse. Steps (a) to (c) are repeated with different position encoding and/or while exciting different slices, until all desired measurement data are stored in the measurement data record. The measurement data contained in the measurement data record are separated into slice-specific measurement data records on the basis of coil sensitivity data of the reception coils used for read-out purposes.

Abstract: A method for operating a magnetic resonance device includes using an acquisition technique using a plurality of coil elements of a transmit and/or receive coil in parallel. For each coil element, a sensitivity map describing the spatial sensitivity of the respective coil element is acquired at the start of the acquisition procedure and used in the reconstruction of a magnetic resonance image dataset from the magnetic resonance data. Magnetic resonance data of the individual coil elements is thus merged. Reference information indicating the position of the patient and/or of the coil elements is measured at the start of the examination procedure. Comparison information supplementary thereto is measured during the acquisition procedure. A reacquisition of at least a portion of the sensitivity maps is performed if at least one recalibration criterion describing a deviation exceeding a threshold value is fulfilled in a comparison of the comparison data with the reference data.

Abstract: 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.

Abstract: A magnetic resonance apparatus and method acquire magnetic resonance data with a recording technique in which the Cartesian scanning of k-space is carried out differently, by a rotation of gradient directions around the center of k-space, for different recording sections of a respective part of the magnetic resonance data, and this recording technique is combined with an accelerating imaging technique for which reference data completely describing a reference range around the center of k-space are used for each individual slice to be scanned. At the beginning of the recording, a calibration area of k-space, which includes all the reference ranges required in the course of recording, is determined and a calibration data set of k-space is recorded in a calibration measurement with complete, Cartesian scanning of the calibration area. Reference data for each recording section are determined from this calibration data set.

Abstract: In a method and magnetic resonance (MR) apparatus for creating an MR 3D image dataset, spin echo sequences are used to acquire two raw datasets that are each undersampled, wherein the excitation pulses or the refocusing pulses radiated in the data acquisitions have an opposite phase for the two raw datasets. These two raw datasets are combined into a combined 3D raw dataset that is not undersampled, and a weighting matrix is calculated for use in calculating the raw data points that were not acquired in the first raw dataset and the raw data points not acquired in the second raw dataset. A first complete raw dataset and second complete raw dataset are thereby calculated, which are then combined. The MR 3D data is then reconstructed from tis combined raw dataset.

Abstract: In a method and apparatus for acquiring magnetic resonance (MR) data, an MR data acquisition scanner is operated, while a subject is situated therein to execute a simultaneous multislice (SMS) turbo spin echo (TSE) sequence by implementing a TSE-based reference scan to acquire reference data and an imaging scan, to acquire raw MR data from the subject. The reference data and the raw MR data are entered into a memory organized as k-space. A computer accesses the memory in order to make the k-space data, composed of said reference data and said image data, available in electronic form, as at least one data file.

Abstract: 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.

Abstract: The disclosure relates to the automatic determination of correction factor values for producing MR images using a magnetic resonance system. A plurality of MR images is produced, wherein each MR image is produced using parameters with parameter values and using correction factors with correction factor values. In order to produce the MR images, MR data of the same examination object is acquired under the same external boundary conditions. The MR images are evaluated automatically in respect of artifacts in the respective MR image, in order to determine the MR image with the least artifacts among the MR images. The correction factor values are determined as those correction factor values which have been used to produce the MR image with the least artifacts. The parameters determine a sequence, with which the MR data is acquired for producing the MR images. The correction factors reduce influences which influence the acquisition of the MR data.

Abstract: 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.

Abstract: In a method and apparatus for characterizing an obstacle within an examination object using a medical image data set by the use of a database containing at least one data class, a trained artificial neural network defines and develops relationships between different obstacles, features and medical imaging data sets. A data entry of a data class is assigned by the neural network to the obstacle within the examination object and the obstacle within the examination object is characterized in an electronic output by this data entry.

Abstract: In a magnetic resonance (MR) method and apparatus, first and second MR data are acquired from respective echo trains with gradient moments of one echo train being in a sequence that is an inversion of at least a portion of the sequence of gradient moments in the second echo train. The MR signals are acquired from at least two substances in a volume of a subject, so that the relaxation of the respective nuclear spins influences the manner by which the first and second data are entered into k-space, so that when an image is reconstructed, the filter effect induced by such relaxation is compensated for.

Abstract: In a method and magnetic resonance (MR) apparatus, for an MR control sequence is activated that contains a large number of blocks that are to be activated successively, with a block of the blocks that are to be played successively having an excitation module for exciting spins in a first region of an examination object and an encoding module for spatial encoding of spins excited in the first region and for recording a signal emitted by spins excited in the first region. A sensor detects an external movement of the examination object during activation of an excitation module of a block. An optimization computer carries out an optimization of the encoding module of this block based on the detected external movement and generates an optimized encoding module. The optimized encoding module is activated.

Abstract: In a method and magnetic resonance (MR) apparatus for reducing artifacts in an image dataset reconstructed from MR raw data that were acquired by radial sampling using different coil elements, for each of at least some of the coil elements, exclusion information is determined that identify MR data from that coil element that are responsible for at least one artifact, by a comparison of a sensitivity map, which defines a spatial reception capability of that coil element, with at least one comparison dataset obtained from at least a portion of the MR data from that coil element. At least the MR data identified from the exclusion information are excluded from the reconstruction of the image dataset.

Abstract: In a magnetic resonance (MR) apparatus and an operating method therefor, a sequence with which the MR data are to be recorded is created in or provided to a control computer of the MR apparatus. A maximum RF output and a maximum gradient performance of the scanner magnetic resonance apparatus during the performance of the sequence are determined by simulating or analyzing the performance of the sequence in the control computer, and it is verified whether the maximum RF output and/or the maximum gradient performance violate predetermined limit values. Execution of the sequence to record the MR data is performed only if the verification showed that the limit values are not violated.

Abstract: In a method and magnetic resonance apparatus for generating at least one combination image dataset, a first image dataset is acquired with a turbo spin echo sequence, wherein the echo signals are timed so that the spins of two spin species in the region to be examined are in-phase. A second image dataset is acquired with a turbo spin echo sequence, wherein the echo signals are timed so that the spins of two spin species in the region to be examined have opposed phase. The first image dataset and the second image dataset are combined to form a combination image.

Abstract: In a magnetic resonance tomography scanner and an operating method therefor, a scanning volume is subdivided in a slice direction into multiple scanning slices, and the scan data of each of the scanning slices are acquired by a scan sequence allocated to the respective scanning slice. Each scan sequence has at least one preparation pulse allocated to the scanning slice, which causes nuclear spin excitation throughout the whole scanning volume. At least two scan sequences are implemented that differ with regard to a coil current fed during the preparation pulse to a field correction coil of the scanner for reducing a local inhomogeneity of a basic magnetic field, or that differ with regard to at least one pulse parameter of the preparation pulse. The respective coil current and/or pulse parameter is determined depending on the position of the scanning slice allocated to the respective scan sequence in the scanning volume.

Abstract: 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.

Abstract: A magnetic resonance (MR) method and apparatus use simultaneous multislice imaging, with different excitations being effective for different slices in respective iterations of a single scanning sequence, in order to acquire raw MR data from different multiple slices, with respectively different contrasts, in the single scanning sequence. Single band excitation of a first slice among the multiple slices takes place in a first iteration of the single scanning sequence, with multi-band excitation then occurring for all of the multiple slices. Raw data are then acquired from the first slice, and at least one other slice among the multiple slices, that respectively exhibit different contrasts due to only the first slice being affected by the single band excitation. In a second iteration of the single scanning sequence, another slice is excited with single band excitation, and the first slice is among the multiple slices excited with multi-band excitation.

Abstract: A method is provided for recording, with a magnetic resonance device, magnetic resonance data of a target region of a patient moved by their breathing. An optical camera arranged in a bore of the magnetic resonance device directed onto the patient is used. Image data of the patient recorded by the camera before and/or during the recording of the magnetic resonance data is evaluated to form breathing information describing the breathing state and the breathing information is used for triggering and/or movement correction and/or assessment of a process in which a patient holds their breath.