Abstract: In a method and a magnetic resonance (MR) system for fat saturation when acquiring MR data in a predetermined volume segment of an examination object (O), a flip angle is determined as a function of a predetermined requirement for a fat signal that is acquired by the magnetic resonance system in the volume segment, and an RF preparation pulse is emitted that has the determined flip angle. This is followed by emission of a SPAIR pulse, followed by acquisition of the MR data.

Abstract: In a method and magnetic resonance (MR) apparatus for acquisition of MR data from a slice in a subject, a first slice selection gradient is activated in a first direction perpendicular to the slice, and an RF excitation pulse then selectively excites nuclear spins in the slice. A second slice selection gradient is activated along the first direction, and a refocusing pulse is radiated. A first phase encoding gradient along the first direction is activated, and a second phase encoding gradient is activated along a second direction perpendicular to the first direction. A selection gradient is activated along a third direction perpendicularly to the first and second directions, during which MR data are acquired from the slice. The acquired MR data are entered into multiple k-space lines that are selected starting from the refocusing pulse, without a further RF pulse being radiated.

Abstract: In order to provide an improved homogeneity of a primary magnetic field during a magnetic resonance imaging process, a method for magnetic resonance imaging of a subject under examination using a magnetic resonance device includes an acquisition of magnetic resonance image data in a plurality of scanning blocks. Different shim settings are set in each case for the plurality of scanning blocks.

Abstract: In a method and magnetic resonance (MR) scanner for acquiring an MR data set of multiple slices of a volume of interest of an examination object (patient), on receipt of a trigger signal relating to the patient's respiration and indicating the start of an acquisition time window, a fat saturation technique is begun and, in one of a number of acquisition blocks having a number of echo trains each relating to a single slice and a single portion of k-space, wherein all the echo trains of each individual acquisition block relate to different slices, magnetic resonance data for the different slices are acquired. A magnetic resonance image of each slice is determined for that slice by combining magnetic resonance data acquired in different acquisition blocks and relating to a portion of k-space. For at least two of the acquisition blocks, a different sequence of the slices to be acquired by the echo trains is used within the acquisition block.

Abstract: A method for adapting activation parameters used to generate a pulse sequence when activating a magnetic resonance system is provided. The method includes determining stimulation values for the pulse sequence based on predefined activation parameters. The stimulation values represent a stimulation exposure of a patient. Test regions that exhibit stimulation maxima are identified in the pulse sequence, and the identified test regions are tested with respect to compliance with a predefined stimulation limit value.

Abstract: In a method for accelerated CEST imaging in magnetic resonance tomography, RF pulses for the saturation of the protons of the substance to be shown are emitted by several transmission coils, and shape of these RF pulses is calculated using an optimization method so that a weighted sum is minimized, the sum exhibiting at least two of the following norms: the norm of the magnetization of free water protons in each point in space, the norm of the deviation of the magnetization of the bound protons from an inverted magnetization in each point in space and the norm of the magnetization of protons with an inverted shift relative to the predefined frequency shift in each point in space. The shape of the RF pulses for subsequent excitation of the free water protons also can be calculated for the optimization method.

Abstract: A method is disclosed for determining analysis information supporting a user assessing the effect of a biological agent on the treatment of a rheumatic disease. The method includes, subsequent to starting the administration of the biological agent: recording a first morphological magnetic resonance imaging record of at least one target joint using a first magnetic resonance sequence; recording a second magnetic resonance imaging record showing the blood flow through the target joint by perfusion imaging using a second magnetic resonance sequence; determining at least a first measuring parameter related to the morphology of the joint by analysis of the first magnetic resonance imaging record and at least a second measuring parameter describing the blood flow in the target joint by analysis of the second magnetic resonance imaging record; and automatic determination of the analysis information from the first and the second measuring parameter.

Abstract: In a method and apparatus for magnetic resonance imaging, in order to enable improved saturation of magnetic resonance signals during an acquisition sequence, the acquisition sequence includes a readout block set with multiple readout blocks, a readout saturation pulse set with multiple readout saturation pulses, and an intermediate saturation pulse set with one or more intermediate saturation pulses, wherein the readout saturation pulse set is disjoint from the intermediate saturation pulse set, at least one readout block of the readout block set includes a readout saturation pulse of the readout saturation pulse set, and at least one intermediate saturation pulse of the intermediate saturation pulse set takes place between two successive readout blocks of the readout block set.

Abstract: In a method and apparatus for magnetic resonance imaging, in order to improve saturation of magnetic resonance signals during an acquisition sequence, the acquisition sequence includes at least one acquisition cycle, that includes: a preparation pulse set with a number of preparation pulses, a saturation pulse set that is disjoint from the preparation pulse set, with a number of saturation pulses, and a readout block set with a number of readout blocks.

Abstract: A method for an image data acquisition with a magnetic resonance device that has a display unit includes acquisition of at least one overview measurement with at least one image data set, evaluation of the at least one image data set, generation of information of a slice geometry, graphical presentation of the information of the slice geometry along at least one slice plane, and acquisition of image data regarding a medical and/or diagnostic question and/or examination.

Abstract: In a method and a control device for operating a magnetic resonance system by a pulse sequence that includes an excitation phase, in which material in an examination volume is excited by emission of an RF excitation pulse during selection gradient pulse in a first gradient direction. In an acquisition phase, a number of RF refocusing pulses are emitted and a number of readout gradient pulses are activated in a second gradient direction for spatially coded acquisition of raw data of the examination volume along the second gradient direction. A prephasing gradient pulse is switched before a first RF refocusing pulse in the second gradient direction. As an alternative or in addition, a rephaser gradient pulse is switched before an RF restore pulse, following the number of RF refocusing pulses, in the second gradient direction. The prephaser gradient pulse and/or the rephaser gradient pulse have lower slew rates than the number of readout gradient pulses.

Abstract: In a method and apparatus for magnetic resonance imaging, an improved saturation of magnetic resonance signals during an acquisition sequence is achieved by the acquisition sequence including at least one acquisition cycle, this acquisition cycle including a saturation pulse set composed of one or more saturation pulses, a first trigger window and a second trigger window. The first trigger window and the second trigger window are temporally delimited from one another. The first trigger window and the second trigger window are activated on the basis of a trigger signal. At least one saturation pulse of the saturation pulse set takes place during the first trigger window. Data acquisition takes place during the second trigger window.

Abstract: In a magnetic resonance method and apparatus, the magnetic resonance apparatus is operated according to a SEMAC (Slice Encoding for Metal Artifact Correction) sequence, and, before executing the SEMAC sequence, a scout sequence is implemented, which is a SEMAC sequence but without phase encoding in the direction perpendicular to the slice selection direction. The number of SEMAC coding steps can then be determined before executing the SEMAC sequence, so that an unnecessarily high number of SEMAC coding steps is avoided.

Abstract: In a magnetic resonance method and apparatus wherein the magnetic resonance device has a movable patient bed, in a first overview measurement, a first image data record of a patient is acquired, and patient information and/or information of a treatment region of a patient is/are determined from the acquired first image data record. In a second overview measurement, dependent on the patient information and/or on the positioning information of the treatment region of the first image data record, a second image data record is acquired. In a planning step a layer planning for the image data acquisition is implemented from the acquired second image data record. Image data for a medical and/or diagnostic issue and/or examination are recorded. The first image data record of the first overview measurement is recorded with a lower spatial resolution than a spatial resolution of the second image data record of the second overview measurement.

Abstract: In a method and a magnetic resonance system to acquire MR data of a slice of a volume segment within an examination subject, a slice selection gradient is activated along a first direction that is orthogonal to the slice. An RF excitation pulse is radiated for selective excitation of the slice, a first phase coding gradient is activated along the first direction, and a second phase coding gradient is activated along a second direction. The second direction is orthogonal to the first direction. A readout gradient is activated along a third direction that is orthogonal to the first direction and the second direction. MR data are acquired while the readout gradient is activated. A number of phase coding steps for the second phase coding gradient is determined depending on the first phase coding gradient.

Abstract: A method is disclosed for determining a position-dependent attenuation map of at least one high frequency coil of a combined magnetic resonance PET device. A magnetic resonance PET device and a computer program product are also disclosed. The method includes determining at least one first signal frequency for at least one coil element during a magnetic resonance PET examination; determining at least one second signal frequency, wherein at least one gradient field is applied during determination thereof; reconstructing the position of the at least one coil element using the at least one first and second signal frequency; reconstructing the position of the at least one high frequency coil using the reconstructed position of the at least one coil element; and determining a position-dependent attenuation map of the at least one high frequency coil using the reconstructed position of the at least one high frequency coil.

Abstract: In a method and apparatus to automatically display and/or measure bone variations in medical image data, an image data set of an examination region is acquired and the bone regions in the image data set are automatically segmented in a first segmentation followed by a second segmentation in which bone variation regions in the image data set are automatically segmented on the basis of the results of the first segmentation. The results of the first and/or second segmentations are stored and/or displayed.

Abstract: In a control method and control unit to monitor a data acquisition of magnetic resonance image data of an imaging area located in a measurement volume of a magnetic resonance apparatus, an RF excitation pulse is radiated by an RF transmission/reception device of the magnetic resonance apparatus, raw data are acquired after a time after the radiated excitation pulse, by means of the RF transmission/reception device, and store the raw data, the raw data are transmitted to a monitoring unit and (a) through (c) are repeated while switching different gradients for spatial coding by readout of k-space corresponding to the imaging area along trajectories that are predetermined by the switched gradients, up to a termination criterion that is predetermined by the monitoring unit.

Abstract: In a method to operate a magnetic resonance (MR) system to acquire MR data, an RF excitation pulse is radiated followed by repeated, chronologically sequential implementation of the following steps in order to respectively acquire the MR data of an echo train. A refocusing pulse is radiated, a phase coding gradient is activated, and an additional magnetic field gradient for spatial coding is activated in a direction that is orthogonal to the direction of the phase coding gradient in order to read out the MR data of a k-space line. A k-space line in the k-space center is acquired at a predetermined echo time. A first half of k-space is acquired by entering data into k-space lines of the respective echo train, the data being acquired before the echo time. A second half of k-space is acquired by entering data into k-space lines of the respective echo train, this data having been acquired after the echo time.

Abstract: A magnetic resonance imaging system includes a control unit configured to (a) compare a plurality of magnitudes of a field of a coil of a local coil, wherein each magnitude of the plurality of magnitudes is measured at a different time; and (b) determine, based on on a comparison result, whether to stop or advance a position adjustment apparatus of the patient couch of the magnetic resonance imaging system.