Abstract: A relative substance composition (RSC) of a portion of a body of a patient in a field of view for a medical image to be taken from the patient in a medical imaging scan is estimated. An input interface receives a piece of patient information data (PPID) and receives a piece of field-of-view information data (PFID). A computing device is configured to implement a trained machine learning algorithm (MLA). The trained MLA is configured and trained to receive the PPID and the PFID received by the input interface as an input and to generate as an output an output signal indicating an RSC of a portion of the body of the patient for the medical image based on the PPID and the PFID. An output interface outputs at least the output signal.

Abstract: A method and a system for providing parameters of a resonance frequency spectrum of a magnetic resonance scan. The system includes: an input interface for receiving a resonance frequency spectrum of a magnetic resonance scan and a computing device configured to implement a trained machine learning algorithm. The trained machine learning algorithm is trained to receive the resonance frequency spectrum received by the input interface as its input and to generate as its output a set of parameters of the resonance frequency spectrum. The system further includes an output interface configured to output the generated set of parameters.

Abstract: A medical imaging unit includes a patient receiving area, a housing unit at least partly surrounding the patient receiving area, a detector unit, and a movement detection unit. The movement detection unit includes two or more detection elements configured for detecting a distance from the detection elements to the patient, and including an evaluation unit. The evaluation unit is configured to establish from detected movement of the individual detection elements a three-dimensional movement of the patient within the patient receiving area.

Abstract: The disclosure relates to a positioning device for positioning in a static magnetic field of a magnetic resonance tomography system and a magnetic resonance tomography system. The positioning device may be moved along a first axis in the magnetic field. Herein, the positioning device includes a plurality of magnetic-field-strength sensors arranged at a distance from one another in the direction of the first axis in predetermined positions on the positioning device.

Abstract: In a method and magnetic resonance apparatus for determining a shim setting in order to increase a homogeneity of the basic magnetic field of the scanner of the apparatus by operating a shim element, information is obtained concerning the dependence of an induced field of the shim element on a set shim setting. A first field map is recorded and a first shim setting for the shim element is determined based on the first field map. A second field map is recorded while the shim element is driven with the first shim setting. A field induced by the shim element by the first shim setting is determined based on the first field map and the second field map. A second shim setting for the shim element is determined based on the determined induced field and the acquired information.

Abstract: A method for determining a position of a mobile device relative to a B0 field magnet along a z-coordinate axis, and a device and a magnetic resonance tomography unit for performing the method are provided. The device includes a magnetic field strength sensor arranged in a fixed relative position. A characteristic magnetic field strength Bref of the B0 field magnet that emerges for a plurality of x-y coordinate pairs with a same reference z-coordinate zref is ascertained. The device is moved along the z-coordinate axis until the magnetic field strength sensor measures the characteristic magnetic field strength Bref.

Abstract: A method is for carrying out an automatic adjustment of an MR system, including a number of receive coils. In such cases, a number of partial spectra in a number of receive coils are measured for an excitation volume of an examination object. The number of partial spectra are evaluated via an algorithm, at least one characteristic value being determined for each partial spectrum and a decision being further made with the aid of the number of characteristic values to determine whether the partial spectra fulfill a quality criterion. Finally, adjustment parameters of the MR system are optimized on the basis of the number of partial spectra.

Abstract: Calculation of shim settings for magnetic resonance imaging includes defining an examination volume for the magnetic resonance imaging in a body of the examination object, determining a local shim volume, which includes a subregion of the examination volume, calculating shim settings, wherein a tissue, which is present in the local shim volume, of the body of the examination object is incorporated into the calculation of the shim settings, and acquiring magnetic resonance raw data of the examination volume by operation of a magnetic resonance scanner, using the calculated shim settings.

Abstract: In a method for operating a medical imaging examination apparatus having multiple subsystems controlled by a control computer in a scan sequence, a control protocol for the scan is provided to the control computer, which determines sequence control data for the control protocol that define different functional subsequences of the scan, with different effective volumes assigned to each functional subsequence. Current ambient conditions of the apparatus are determined that are decisive for the determined relevant sequence control data and associated effective volumes. Control signals for the scan are determined from the sequence control data, the effective volumes and the current ambient conditions determined that optimize the functional subsequences of the scan.

Abstract: A device and a method are provided for status acquisition of a RF coil on or in a magnetic resonance device. The device may be arranged on the RF coil and comprises a status acquisition unit. The status unit is configured to acquire a status of the RF coil and to generate a status-dependent output signal.

Abstract: A method is for carrying out an automatic adjustment of an MR system, including a number of receive coils. In such cases, a number of partial spectra in a number of receive coils are measured for an excitation volume of an examination object. The number of partial spectra are evaluated via an algorithm, at least one characteristic value being determined for each partial spectrum and a decision being further made with the aid of the number of characteristic values to determine whether the partial spectra fulfill a quality criterion. Finally, adjustment parameters of the MR system are optimized on the basis of the number of partial spectra.

Abstract: The disclosure relates to a positioning device for positioning in a static magnetic field of a magnetic resonance tomography system and a magnetic resonance tomography system. The positioning device may be moved along a first axis in the magnetic field. Herein, the positioning device includes a plurality of magnetic-field-strength sensors arranged at a distance from one another in the direction of the first axis in predetermined positions on the positioning device.

Abstract: In a method and magnetic resonance apparatus for determining a shim setting in order to increase a homogeneity of the basic magnetic field of the scanner of the apparatus by operating a shim element, information is obtained concerning the dependence of an induced field of the shim element on a set shim setting. A first field map is recorded and a first shim setting for the shim element is determined based on the first field map. A second field map is recorded while the shim element is driven with the first shim setting. A field induced by the shim element by the first shim setting is determined based on the first field map and the second field map. A second shim setting for the shim element is determined based on the determined induced field and the acquired information.

Abstract: A method for determining a position of a mobile device relative to a B0 field magnet along a z-coordinate axis, and a device and a magnetic resonance tomography unit for performing the method are provided. The device includes a magnetic field strength sensor arranged in a fixed relative position. A characteristic magnetic field strength Bref of the B0 field magnet that emerges for a plurality of x-y coordinate pairs with a same reference z-coordinate zref is ascertained. The device is moved along the z-coordinate axis until the magnetic field strength sensor measures the characteristic magnetic field strength Bref.

Abstract: The embodiments relate to a B1-map establishment system for establishing B1-maps, operating using a method including: establishing a number of relative B1-maps and storing the relative B1-maps for subsequent, in particular repeated use. The B1-maps are used in a method for establishing an actuation sequence including: establishing a quantitative B1-map. establishing normalized B1-maps on the basis of the relative B1-maps and the quantitative B1-map, and establishing an actuation sequence or acquiring magnetic resonance measurement data using the normalized B1-maps. Furthermore, the embodiments relate to an actuation sequence establishment system and a magnetic resonance imaging system including such an actuation sequence establishment system.

Abstract: Calculation of shim settings for magnetic resonance imaging includes defining an examination volume for the magnetic resonance imaging in a body of the examination object, determining a local shim volume, which includes a subregion of the examination volume, calculating shim settings, wherein a tissue, which is present in the local shim volume, of the body of the examination object is incorporated into the calculation of the shim settings, and acquiring magnetic resonance raw data of the examination volume by operation of a magnetic resonance scanner, using the calculated shim settings.

Abstract: A device and a method are provided for status acquisition of a RF coil on or in a magnetic resonance device. The device may be arranged on the RF coil and comprises a status acquisition unit. The status unit is configured to acquire a status of the RF coil and to generate a status-dependent output signal.

Abstract: In a method for operating a medical imaging examination apparatus having multiple subsystems controlled by a control computer in a scan sequence, a control protocol for the scan is provided to the control computer, which determines sequence control data for the control protocol that define different functional subsequences of the scan, with different effective volumes assigned to each functional subsequence. Current ambient conditions of the apparatus are determined that are decisive for the determined relevant sequence control data and associated effective volumes. Control signals for the scan are determined from the sequence control data, the effective volumes and the current ambient conditions determined that optimize the functional subsequences of the scan.

Abstract: A medical imaging unit includes a patient receiving area, a housing unit at least partly surrounding the patient receiving area, a detector unit, and a movement detection unit. The movement detection unit includes two or more detection elements configured for detecting a distance from the detection elements to the patient, and including an evaluation unit. The evaluation unit is configured to establish from detected movement of the individual detection elements a three-dimensional movement of the patient within the patient receiving area.

Abstract: The embodiments relate to a B1-map establishment system for establishing B1-maps, operating using a method including: establishing a number of relative B1-maps and storing the relative B1-maps for subsequent, in particular repeated use. The B1-maps are used in a method for establishing an actuation sequence including: establishing a quantitative B1-map. establishing normalized B1-maps on the basis of the relative B1-maps and the quantitative B1-map, and establishing an actuation sequence or acquiring magnetic resonance measurement data using the normalized B1-maps. Furthermore, the embodiments relate to an actuation sequence establishment system and a magnetic resonance imaging system including such an actuation sequence establishment system.