Systems and methods for ZTE MRI are disclosed. An exemplary method includes obtaining Larmor frequencies of water and/or fat for a region of interest of a subject to be imaged at a pre-scan and setting a center frequency for an RF transceiver of the MR system at a value between the Larmor frequencies of water and fat. A ZTE pulse sequence is applied to the subject and MR signals in response to the ZTE pulse sequence are received from the subject. The received MR signals are demodulated with the center frequency and an in-phase ZTE image is generated from the demodulated MR signals.

A system for MRI is provided. The system may obtain a plurality of sets of under-sampled k-space data corresponding to a plurality of frames. Each set of under-sampled k-space data may be acquired simultaneously from a plurality of slice locations of a subject in one of the frames using an MRI scanner. The system may reconstruct a plurality of reference slice images based on the sets of under-sampled k-space data of the plurality of frames. Each of the reference slice images may be representative of one of the slice locations in more than one frame of the frames. The system may further reconstruct a plurality of image series based on the sets of under-sampled k-space data and the reference slice images. Each image series may correspond to one of the slice locations and include a plurality of slice images of the corresponding slice location in the plurality of frames.

An electromagnet model or models are created to generate the static and radio frequency magnetic fields of an NMR down-hole logging tool. The magnetic field distributions are then used in spin dynamics (SD) simulations to model the impacts of various effects on NMR logging data, effects that cannot be accurately describe by theoretical formulation alone. The accuracy of the electromagnetic model and the SD simulation may be verified against experimental observations or trial logging runs. Simulation of electronic circuit, molecular diffusion, tool motion can all be incorporated in the SD simulation. The NMR data inversion process can be modified according to echoes obtained from SD simulation to obtain more accurate petrophysical parameters.

A magnetic resonance (MR) imaging technique enables parallel imaging in combination with fat suppression at an increased image quality, notably in combination with EPI. The method includes acquiring reference MR signal data from the object in a pre-scan and acquiring imaging MR signal data from the object in parallel via one or more receiving coils having different spatial sensitivity profiles. The MR signal data are acquired with sub-sampling of k-space and with spectral fat suppression and an MR image is reconstructed from the imaging MR signal data. Sub-sampling artefacts are eliminated using sensitivity maps indicating the spatial sensitivity profiles of the two or more RF receiving coils. A B.sub.0 map is derived from the reference MR signal data and the spatial dependence of the effectivity of the spectral fat suppression is determined using the Bo map. In the image reconstruction step, signal contributions from water and fat are separated using regularisation taking the spatial dependence of the effectivity of the spectral fat suppression into account.

Described herein are methods for monitoring and/or extracting subject motion from multi-channel electrical coupling in imaging of the subject, in particular in magnetic resonance (MR) imaging of the subject.

Systems and methods for ZTE MRI are disclosed. An exemplary method includes obtaining Larmor frequencies of water and/or fat for a region of interest of a subject to be imaged at a pre-scan and setting a center frequency for an RF transceiver of the MR system at a value between the Larmor frequencies of water and fat. A ZTE pulse sequence is applied to the subject and MR signals in response to the ZTE pulse sequence are received from the subject. The received MR signals are demodulated with the center frequency and an in-phase ZTE image is generated from the demodulated MR signals.

An image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry generates an image by performing an analysis based on a Z-spectrum generated based on data obtained by executing a pulse sequence including application of a Magnetization Transfer (MT) pulse and causes a display to display the generated image by dividing the image into a plurality of segments.

A magnetic resonance imaging (MRI) method is provided. The method includes: a first echo signal and a second echo signal generated from each of channels of a MRI device are acquired by performing a pre-scanning according to an imaging sequence; a correction displacement with which an imaging phase consistency is maximum is determined by shifting a signal curve of the second echo signal for each of the channels for a plurality of times; a one-order phase correction value and a zero-order phase correction value for the channels are determined under the imaging sequence according to the correction displacement; a formal scanning is performed according to the imaging sequence to obtain scanning data; and a phase correction is performed on the scanning data according to the one-order phase correction value and the zero-order phase correction value to obtain target scanning data for reconstructing an image.

A three-dimensional magnetic resonance image dataset of an object is acquired using a multi-shot imaging protocol in which several k-space lines are acquired in one shot. The three-dimensional k-space includes a central region and a periphery, wherein the sampling order of k-space lines differs between the central region and the periphery. At least one k-space line from each shot passes through the central region, whereas the periphery includes regions, which are sampled by k-space lines from a subset of the plurality of shots.

The invention relates to a method of Dixon-type MR imaging. It is an object of the invention to provide a method that enables Dixon water/fat separation with high SNR and with improved noise propagation in the water/fat separation. The method comprises the steps of: subjecting an object (10) to a first imaging sequence, which generates a number of differently phase encoded first MR echo signals at a first echo time, such that contributions from MR signals emanating from water protons and MR signals emanating from fat protons to the first MR echo signals are essentially in phase, acquiring the first MR echo signals using a first signal receiving bandwidth, subjecting the object (10) to a second imaging sequence which generates a number of differently phase encoded second MR echo signals at a second echo time, such that contributions from MR signals emanating from water protons and MR signals emanating from fat protons to the second MR echo signals are at least partially out of phase, acquiring the second MR echo signals using a second signal receiving bandwidth which is larger than the first receiving bandwidth, wherein the number of phase encodings of the first imaging sequence is smaller than the number of phase encodings of the second imaging sequence, and reconstructing a MR image from the first and second MR echo signals, whereby signal contributions from water protons and fat protons are separated. Moreover the invention relates to a MR device and to a computer program to be run on a MR device.