The present disclosure provides an example method for using an MRI system electrically coupled to a computing device. The method includes generating, via the MRI system, an echo-shifted echo-planar imaging with blip up/down acquisition (esEPI-BUDA) pulse sequence including a first radiofrequency (RF) pulse and a second RF pulse, the first RF pulse followed by a first echo-train that is interleaved with the first and the second RF pulses, and the second RF pulse followed by a second echo-train such that the first and the second echo-trains have opposite phase-encoding blip gradient polarities to traverse echo planar imaging (EPI) k-space in a reversed order. In response to the pulse sequence being generated, the MRI system acquires two k-space datasets within a single shot and corrects image distortion, via the MRI system, based on the two acquired k-space datasets.

A method for recording scan data of an examination object which includes spins of at least two different spin species by means of a magnetic resonance system. The method includes: radiating in a composite RF pulse, for example, a binomial pulse comprising at least two subpulses; switching bipolar slice selection gradients so that successive subpulses of the composite RF pulse are encoded with differently polarized slice selection gradients; recording as scan data magnetic resonance signals triggered by the composite RF pulse; and storing and/or further processing the recorded scan data, wherein the subpulses are radiated in at a frequency that is detuned by a detuning shift relative to a resonance frequency of a spin species that is to be represented, such that by way of the detuning shift a linear evolution of the phase over the temporal progression of the composite RF pulse results.

A magnetic resonance (MR) system for correcting concomitant field effects is provided. The MR system includes a gradient coil assembly including a plurality of gradient coils configured to apply at least one gradient field to a polarizing magnetic field of the MR system. The MR system also includes a second-order correction coil assembly including a first second-order correction coil configured to correct effects of a first term of second-order concomitant fields generated by the at least one gradient field. The system further includes a second-order correction computing device including at least one processor in communication with at least one memory device. The at least one processor is programmed to control the second-order correction coil assembly by instructing the MR system to apply a compensation field to the second-order correction coil assembly asynchronously with the at least one gradient field.

Systems and methods include determination of a field map representing inhomogeneity of a main magnetic field of a magnetic resonance scanner within a subject, determination of a pixel shift map based on the field map, operation of the magnetic resonance scanner to generate an image of the subject, determination of a portion of the pixel shift map corresponding to a phase-encoding line of the image, determination of a distortion matrix corresponding to the portion of the pixel shift map, determination of a locally-regularized pseudoinverse distortion matrix based on the distortion matrix, and correction of the line of the image based on the locally-regularized pseudoinverse distortion matrix.

Techniques are provided for performing echo planar imaging (EPI) data correction. This includes obtaining positive and negative readout gradient calibration data of an imaging target through non-accelerated EPI acquisitions; respectively adopting first and second DPG kernels to be fitted and respectively used to eliminate phase errors of positive and negative readout gradients to fit the positive and negative readout gradient calibration data of the imaging target, with the fitting targets being positive and negative readout gradient data, respectively, in ghost-free target ACS data, and obtaining, after the fitting, a first and a second DPG kernel for final use; obtaining imaging data of the imaging target through an EPI acquisition; adopting the first and second DPG kernels to correct the phase errors of the imaging data to obtain phase-error-free imaging data.

The disclosure relates to multispectral magnetic resonance imaging which includes capturing raw data at raw data points of a raw data space of a plurality of three-dimensional spectral volumes, said spectral volumes each differing at least in their frequency range used for excitation, the raw data comprising a plurality of raw data sets, in each case a raw data set is in each case to be assigned to a spectral volume, each raw data set comprises raw data of a raw data space corresponding to a sampling pattern, and the sampling patterns for raw data sets of in each case two spectrally adjacent spectral volumes are different from one another; and providing the raw data comprising the plurality of raw data sets.

A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to, in readout of magnetic resonance data in imaging of a subject, read out the magnetic resonance data for a position along a first direction in k-space and a position along a second direction in the k-space different from the first direction in a batch without applying a refocusing pulse, apply the refocusing pulse and perform phase encoding to reset readout positions of the magnetic resonance data, and read out the magnetic resonance data in a batch such that a total readout time with regard to the readout of the magnetic resonance data does not exceed a predetermined reference time that depends on a spatial resolution.