A method using 2D multi-spectral imaging (2DMSI) for MRI imaging of a metallic object (such as a biopsy needle) and region surrounding the metallic object within an imaging field of view of an MRI apparatus includes segmenting the imaging field-of-view into spatial-spectral bins, where the segmenting is based on off-resonance frequency induced by the metallic object and slice location; selectively exciting each frequency bin of the spatial-spectral bins by inverting a slice selection gradient between excitation and refocusing pulses; performing repeated acquisition with different radiofrequency modulations to produce acquired images of adjacent bins; composing a 2DMSI image by root-sum-of-squares combination of the acquired images of adjacent bins; and highlighting in the 2DMSI image an area of furthest off-resonance bins based on 2DMSI off-resonance information by thresholding image intensity in frequency bins, thereby indicating a contour of the metallic object.

A compound consisting of the following components: (A) 40-99.99 weight percent of at least one thermoplastic or thermoset polymer material selected as a halogenated or perhalogenated polymer; (B) 0.01-60 weight percent of at least one inorganic particulate diamagnetic or paramagnetic material; (C) 0-39.99 weight percent of at least one additive different from (B); is proposed as a construction material in the detection-relevant spatial area (9) of a nuclear magnetic resonance device with a static magnetic field of at least 1 Tesla, and furthermore corresponding constructional elements, in particular sample holders, our proposed as well as method of manufacturing such constructional elements and uses of such constructional elements.

Improved magnetic resonance imaging systems, methods and software are described including a low field strength main magnet, a gradient coil assembly, an RF coil system, and a control system configured for the acquisition and processing of magnetic resonance imaging data from a patient while utilizing a sparse sampling imaging technique.

A shimming method and device, an electronic device, and a storage medium are disclosed. The shimming method includes: obtaining object static magnetic field distribution information corresponding to a target object, the object static magnetic field distribution information including the static magnetic field distribution information of the target object under the action of a main magnet of a magnetic resonance system; determining a target static magnetic field based on the object static magnetic field distribution information and a preset shim coil magnetic field distribution model; and adjusting at least one shim coil parameter in the shim coil magnetic field distribution model until a magnetic field uniformity of the target static magnetic field satisfies a preset condition, and accordingly obtaining at least one target shim coil parameter.

A method for magnetic resonance imaging (MRI) may include obtaining a plurality of first magnetic resonance (MR) data sets related to a region of interest (ROI) of a subject. The plurality of first MR data sets may be collected based on two or more different values of a scan parameter. The method may also include determining a plurality of second MR data sets based on the plurality of first MR data sets. Each of the plurality of second MR data sets may correspond to at least two of the plurality of first MR data sets. The method may also include generate, based on the plurality of second MR data sets, a plurality of T1 weighted images of the ROI each of which corresponds to a target time point.

A method for magnetic resonance imaging suppresses off-resonance gradient-induced image artifacts due to metal. The method includes performing by a magnetic resonance imaging (MRI) apparatus two multi-spectral imaging (MSI) acquisitions within a field of view of the MRI apparatus, where the two MSI acquisitions have alternating-sign readout gradients. The two MSI acquisitions are then processed and combined by the MRI apparatus using a weighted image combination to produce a final image.

A method for acquiring 3D multispectral MRI of a target includes scanning a spectrum of spectral windows with an MRI scanner, wherein each spectral window of the spectrum defines a continuously-differentiable distribution of frequencies around a scan frequency and adjacent scan frequencies are spaced apart by substantially uniform frequency offsets such that adjacent spectral windows substantially uniformly overlap, wherein selected adjacent spectral windows are scanned in consecutive passes, and nearest neighbor spectral windows within each pass are scanned at a maximum temporal spacing within the pass.

A system for bone imaging is disclosed. A processing unit is provided for processing an echo MRI dataset. The processing unit is configured to apply a phase ramp to the radial sampling lines of the complex data according to the radial sampling scheme to obtain a bone-enhanced image dataset, wherein a single phase ramp is applied to a radial sampling line of the sampling scheme, which radial sampling line extends on both sides of an origin defined by the echo time, and wherein the phase ramp is based on an equation. A combining unit is provided for combining the MRI dataset with the bone-enhanced image dataset to obtain a background suppressed image dataset.

In a method and apparatus for magnetic resonance imaging preview and establishing an MR model, an MRI scanner is controlled so as to execute an MR model scan sequence to perform an MRI scan of a designated patient, to obtain an MR model of the patient. One type of scan sequence is sequentially selected from all types of scan sequence supported by the MRI device, and one parameter set is sequentially selected from at least one parameter set supported by this type of scan sequence. The selected sequence and the selected parameter set are used to subject the MR model to a virtual MRI scan, to obtain an MR preview image corresponding to the selected sequence and the selected parameter set for the sequence C. This is repeated for all types of scan sequence supported by the MRI scanner and all parameter sets supported by each type of scan sequence. An MR model of a patient can thereby be established, and MR images of the patient to be previewed quickly, before an MRI scan of the patient is actually begun.

A local coil device for a head of a patient for use in a magnetic resonance device includes a local coil with at least one local coil element and a receiver for the head of the patient in which the head may be received in a desired pose. The local coil device also includes a shim coil device with at least one shim coil element for compensating basic field inhomogeneities in a region of interest of the prefrontal cortex of the patient. With respect to the desired pose, the shim coil element of the shim coil device integrated in the local coil or received in a receiver for the shim coil device is arranged anterior to the head.