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.

A magnetic resonance (MR) apparatus has an MR scanner that includes a basic field magnet, which defines a patient receiving zone and that has at least one superconducting coil that generates a basic magnetic field in the MR scanner. The MR scanner has a power supply controlled by at least one control computer of the MR apparatus for the purpose of providing electrical power to the superconducting coil. The power supply is arranged on, and may be fixedly mounted to, the basic field magnet or integrated into the basic field magnet.

A method of designing a pulse sequence for parallel-transmission MRI includes a) for each one of a plurality of subjects, estimating a linear adjustment transformation (L), converting amplitude maps of RF fields generated by respective transmit channels of a MRI apparatus into respective standardized maps; and b) determining RF waveforms (P) minimizing a discrepancy between subject-specific distributions of flip-angles of nuclear spin and a target distribution, averaged over said subjects, the subject-specific distributions corresponding to the flip-angle distributions achieved by applying a superposition of RF fields, each having a temporal profile described by one of said RF waveforms and a spatial amplitude distribution described by a respective standardized map determined for the subject. A method and an apparatus for performing parallel-transmission MRI using such a pulse sequence are provided.

In some aspects, a magnetic system for use in a low-field MRI system. The magnetic system comprises at least one electromagnet configured to, when operated, generate a magnetic field to contribute to a B.sub.0 field for the low-field MRI system, and at least one permanent magnet to produce a magnetic field to contribute to the B.sub.0 field.

The present disclosure provides a system for MRI. The system may obtain MRI scan data of a subject by directing an MRI scanner to perform an MRI scan on the subject according to a first gradient waveform. The system may also determine a second gradient waveform based on the first gradient waveform and a gradient waveform determination model. The gradient waveform determination model may have been trained according to a machine learning algorithm. The system may further generate a target reconstruction image of the subject based on the second gradient waveform and the MRI scan data.

An operating method for a medical imaging apparatus includes an imaging program stored in a memory, with which parameters for controlling image data generation will be predetermined. The imaging program has a number of routine examination steps. At least one variant, which is likewise stored in the memory and which is able to be selected by a user instead of the routine examination step for image data generation, exists at least for one of the routine examination steps.

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.

A magnetic resonance imaging (MRI) apparatus and a method of generating an MR image that may be generated in a resource saving mode by taking into account energy efficiency. The method includes: setting a resource saving mode; acquiring, based on the set resource saving mode, at least one description corresponding to a plurality of imaging filters; and generating a first MR image based on the acquired at least one description.

A computer-implemented method of visualizing blood flow through a patient using magnetic resonance imaging (MRI) includes receiving an image of the portal venous system of the patient's liver at a full field of view. A reduced field of view is defined which encompasses the portal venous system of the patient's liver and excludes extraneous anatomy in the full field of view. A navigator area is defined in the full field of view and outside of the reduced field of view. Transmit channels are used to selectively excite the reduced field of view and the navigator area throughout a cardiac cycle of the patient. Measurement data is acquired in response to the selective excitation. The acquired data is used to generate time-resolved 3D datasets. Additionally, a 3D visualization of blood flow though the portal venous system is generated based on the time-resolved 3D datasets.

Disclosed are a method and apparatus for providing information about a point of interest (POI) with respect to at least one pulse sequence for magnetic resonance imaging (MRI). The method includes receiving information about a first POI and at least a second POI of the at least one pulse sequence, analyzing the at least one pulse sequence, displaying the at least one pulse sequence, based on the analysis, marking the first POI and the at least second POI on the displayed at least one pulse sequence, matching a pointer with a closest POI with respect to the first POI and the at least second POI when the pointer is located within a predetermined range from at least one of the marked POIs, and displaying information about the matched POI.