Abstract: In a method for correction of a B0 field map measured with a magnetic resonance device, that describes deviations from a nominal field strength in the homogeneity area of the magnetic resonance device by deviations from a nominal frequency for protons bonded to water, the deviations being represented as Larmor frequency values for different picture elements shifted by chemical shifts, the B0 field map is recorded with spins of the fat and water protons not in phase. The B0 field map is segmented by evaluating the differences of the Larmor frequency values of adjacent picture elements of the B0 field map in at least two contiguous clusters. For each cluster, a decision is made on the basis of a smoothness criterion and a compactness criterion as to whether a cluster containing a majority of protons bonded into fat is involved.

Abstract: In a method and a control sequence determination device for determining a magnetic resonance system control sequence includes at least one radio-frequency pulse train to be emitted by a magnetic resonance system, a target magnetization is acquired and a k-space trajectory is determined. A radio-frequency pulse train for the k-space trajectory is then determined in an RF pulse optimization method using a target function, wherein the target function includes a combination of different trajectory curve functions, of which at least one trajectory curve function is based on a trajectory error model. A method for operating a magnetic resonance system uses such a control sequence and a magnetic resonance system has such a control sequence determination device.

Abstract: In a method and magnetic resonance (MR) apparatus for recording MR signals in a recording volume of an examination object with an imaging sequence, the recording volume has a first recording region in which at least one system component of the scanner of the MR apparatus has a first homogeneity, which is greater than a homogeneity of the at least one scanner component in a second recording region of the recording volume. A magnetization of nuclear spins in the recording volume is produced by at least one RF pulse, with the RF pulse being determined such that the magnetization produced in the first recording region by the at least one RF pulse is greater than magnetization produced in the second recording region by the at least one RF pulse.

Abstract: In order to determine the position of a reception coil in a magnetic resonance (MR) scanner of an MR apparatus, wherein the instrument has a reception coil, MR data are acquired from the reception coil along one direction in the scanner, and are provided to a processor that determines a position specification from the acquired MR data. The processor determines the position specification by initially executing a training period, using a first position specification establishment method, in order to produce a training period dataset, and then the training period dataset is used to establish a final position specification with a second position specification establishment method that differs from the first position specification establishment method.

Abstract: In a method to generate a spatially selective excitation in an imaging region of a magnetic resonance apparatus that precedes an acquisition of magnetic resonance data, in the course of the excitation an excitation trajectory in k-space is traversed, the excitation trajectory having a symmetry relative to the k-space center in at least one direction of k-space in the sense that a first traversed extreme value in this direction corresponds to the negative of the other extreme value traversed in this direction, so the excitation trajectory is shortened in the at least one directions on one side of the zero point between the extreme values, and the shortened excitation trajectory is used for excitation.

Abstract: A method for establishing a magnetic resonance system actuation sequence is described. A first number of field distribution maps are acquired for slices of the measurement region, and a radiofrequency pulse train is established on the basis thereof for the magnetic resonance system actuation sequence. This acquisition of the first number of field distribution maps may be brought about on the basis of an acquisition scheme. A reduced number of field distribution representation maps are established on the basis of the acquired field distribution maps, which field distribution representation maps represent the first number of acquired field distribution maps in accordance with a predetermined optimization criterion, and the radiofrequency pulse train is established on the basis of the field distribution representation maps.

Abstract: A method for creating an image data set using a magnetic resonance system including at least two RF transmit coils includes, for each RF transmit coil, calculating a value for a susceptibility magnetic field gradient to be corrected from the Gs map in combination with the B1 map of the RF transmit coil. The method includes, for each RF transmit coil, calculating a time delay of the excitation pulse. The method also includes calculating a complex weighting factor for scaling the pulse profile for each RF transmit coil to achieve an as uniform as possible deflection of the magnetization by the excitation pulse over the area under examination, and passing through the imaging sequence. The RF transmit coils each emit an excitation pulse with the calculated time delay and with a pulse profile scaled according to the calculated complex weighting factors.

Abstract: A magnetic resonance facility is operated by an external control device. The magnetic resonance facility includes an interface for communicating with the external control device and establishes a communications link between the external control device and the magnetic resonance facility via the interface, acquire an instruction from the external control device via the interface, and carries out the instruction on the magnetic resonance facility.

Abstract: Disclosed is a method for producing a recombinant protein of interest, the method being characterized in by the following steps: (a) providing a fusion protein comprising an Npro autoprotease moiety and a protein of interest moiety in inclusion bodies, (b) solubilizing the inclusion bodies, (c) allowing the fusion protein to be cleaved by the Npro autoprotease moiety under chaotropic conditions, wherein the recombinant protein of interest is cleaved from the fusion protein and wherein the recombinant protein of interest is not yet renatured or simultaneously renatured, and (d) recovering the protein of interest, optionally including a renaturing step for the protein of interest.

Abstract: The embodiments relate to a magnetic resonance tomograph and a method for tracking a marker in an examination subject by a magnetic resonance tomograph. The magnetic resonance tomograph includes a first image recording mode for acquiring the position of the marker. In one act of the method, data for acquiring the position of the marker is recorded with the first image recording mode. In a further act, a position of the marker is determined from the data and a first image with a location-accurate reproduction of the marker is prepared. The recording of the data for acquiring the position of the marker takes place depending on an event.

Abstract: A method and a control sequence determination device for the determination of a magnetic resonance system activation sequence including at least one high-frequency pulse sequence to be transmitted by a magnetic resonance system are provided. A current B0 map and optionally a target magnetization are acquired. In addition, a k-space trajectory type is determined. An error density is calculated in a k-space based on the current B0 map and optionally based on the target magnetization using an analytic function. This analytic function defines an error density in the k-space as a function of the current B0 map and optionally the target magnetization. Taking account of the error density in the k-space, a k-space trajectory of the specified k-space trajectory type is determined. The high-frequency pulse sequence is determined for the k-space trajectory in an HF pulse optimization process.

Abstract: System and methods are provided for determining temperature with the aid of an intervention apparatus. A reference temperature at a detection location inside the examination object is detected using a reference temperature measuring unit. A relative temperature distribution in a measuring volume, having a spatial position in relation to the detection location of the reference temperature that is known, is detected using a temperature distribution measuring unit. An evaluation unit ascertains an absolute temperature distribution using the reference temperature and the relative temperature distribution.

Abstract: In a method, computer and magnetic resonance imaging system for determining a control sequence for operating the magnetic resonance imaging system to generate magnetic resonance image data of a region to be imaged of an examination subject, from which magnetic resonance raw data are acquired, information describing the anatomical structure of the region to be imaged is made available in the computer, and a surrounding area and a central area are specified in the region to be imaged dependent on the determined anatomical structure. Furthermore, a one-dimensional water/fat saturation pulse sequence for saturating the surrounding areas is determined and a multidimensional water/fat saturation pulse sequence for saturating the central area is determined.

Abstract: A medical handle comprises a drive unit and a control device or circuit for driving a medical tool. The control device or circuit comprises a control and/or regulating circuit for controlling and/or regulating the drive unit, the drive unit comprises at least one magnetic element and a sensor system for determining the alignment of the at least one magnetic element. To achieve simpler assembly and a greater resistance to the ambient conditions that prevail during sterilization in comparison with known handles, the sensor system and the control and/or regulating circuit are combined in a joint control module, and the at least one magnetic element is arranged in the medical handle in such a way that at least a part of the control module can be positioned in the immediate vicinity of the at least one magnetic element and that the sensor system is arranged in the control module in such a way that it can be positioned in the immediate vicinity of the at least one magnetic element.

Abstract: In a method and apparatus for the reconstruction of magnetic resonance image data, magnetic resonance measurement data are acquired from an object under examination by a Dixon recording technique. A model is provided to a computer, the model including modeling data matched to the object under examination from which the magnetic resonance measurement data were acquired. At least one tissue image is reconstructed in the computer from the magnetic resonance measurement data using the model matched to the object under examination, wherein the at least one tissue image includes at least one fat image and/or at least one water image.

Abstract: An electromagnetic linear actuator has a frame (stator) and an armature each at least partially formed of soft magnetic material. The armature can be moved relative to the frame along a longitudinal axis, they form a gap therebetween in an open position and lie against each other in a closed position with the gap closed. A first armature coil is connected to the armature so that a force acting on the first armature coil is transferred to the armature. An excitation magnetic field is generated and guided at least partially by the frame and the armature and acts with a force on the first armature coil when current flows through the first armature coil, to close the gap. The frame, the armature, and the excitation magnetic field are configured so that a retaining force takes effect when the gap between the frame and the armature is closed.

Abstract: In method and a control sequence determination device to determine a magnetic resonance system control sequence that includes at least one radio-frequency pulse train to be emitted by a magnetic resonance system, a target magnetization (m) is initially detected, and an energy distribution function in k-space is determined on the basis of the target magnetization. A k-space trajectory is then determined under consideration of the energy distribution function in k-space, for which the radio-frequency pulse train is then determined in an RF pulse optimization method. The method is suitable for operation of a magnetic resonance system, and a magnetic resonance system includes such a control sequence determination device.

Abstract: A method for creating an image data set using a magnetic resonance system including at least two RF transmit coils includes, for each RF transmit coil, calculating a value for a susceptibility magnetic field gradient to be corrected from the Gs map in combination with the B1 map of the RF transmit coil. The method includes, for each RF transmit coil, calculating a time delay of the excitation pulse. The method also includes calculating a complex weighting factor for scaling the pulse profile for each RF transmit coil to achieve an as uniform as possible deflection of the magnetization by the excitation pulse over the area under examination, and passing through the imaging sequence. The RF transmit coils each emit an excitation pulse with the calculated time delay and with a pulse profile scaled according to the calculated complex weighting factors.

Abstract: Method for the production of indexable inserts, which exhibits the following: Deposition of a layer of cutting tip material forming the indexable inserts (40) by means of a PVD method on a dissolvable profiled substrate (10), and—dissolving of the substrate to produce the form of free-standing parts as indexable inserts.

Abstract: In a method and magnetic resonance apparatus for determination of radio-frequency pulses, a time-parallel transmission of a radio-frequency pulse influences the transverse magnetization of an object under examination in a specified spatial region. The spatial region is depicted as a vector and approximated by decomposition into a finite number of weighted basis functions of the decomposition. As a result, the length of the approximated vector is less than the length of the original vector. The radio-frequency pulse is determined as a function of the approximated vector. This method can be used to determine a multichannel RF pulse.