Abstract: A method for improving image quality in a magnetic resonance imaging system, the method includes rapidly modulating an electrical current in a matrix shim coil of the magnetic resonance imaging system to compensate high order eddy currents in the system.

Abstract: A method is provided for recording, with a magnetic resonance device, magnetic resonance data of a target region of a patient moved by their breathing. An optical camera arranged in a bore of the magnetic resonance device directed onto the patient is used. Image data of the patient recorded by the camera before and/or during the recording of the magnetic resonance data is evaluated to form breathing information describing the breathing state and the breathing information is used for triggering and/or movement correction and/or assessment of a process in which a patient holds their breath.

Abstract: A system and method of acquiring an image at a magnetic resonance imaging (MRI) system is provided. Accordingly, an analog signal based on a pulse sequence and a first gain is obtained. The analog signal is converted into a digitized signal. A potential quantization error is detected in the digitized signal based on a boundary. When the detection is affirmative, a replacement analog signal based on the pulse sequence is received. At least one portion of the replacement analog signal can be based on an adjusted gain. The adjusted gain is a factor of the first gain. The replacement analog signal is digitized into a replacement digitized signal. At least one portion of the replacement digitized signal corresponding to the at least one portion of the replacement analog signal is adjusted based on a reversal of the factor.

Abstract: In various embodiments of the invention, inductive coupling can be to a secondary coil rather than a primary coil in order to optimize the topology of the NMR probe. In addition, by coupling to a secondary coil using a detection coil located below the lower insulator the RF homogeneity and signal to noise can be improved together with the NMR probe topology. By effecting inductive coupling to an inductor in a multiple resonance circuit, rather than to the sample inductor parameters associated with the NMR, probe construction can be arranged to increase RF homogeneity and signal to noise, while reducing space utilization constraints. In various embodiments of the invention, the primary mode in a secondary coil can be split into two modes with a resonator with inductive coupling to the secondary coil.

Abstract: A well-logging method for a geological formation having a borehole therein may include collecting a plurality of nuclear magnetic resonance (NMR) snapshots from the borehole indicative of changes in the geological formation and defining NMR data. The method may further include identifying a plurality of fluids within the geological formation based upon the NMR data, determining respective NMR signatures for the identified fluids based upon the NMR data, determining apparent volumes for the identified fluids based upon the NMR signatures, and determining adjusted volumes for the identified fluids based upon the apparent volumes.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a sequence control unit, an image generating unit, and a deriving unit. The sequence control unit executes first imaging scan for acquiring data of a range including a target internal organ and second imaging scan for acquiring data for a diagnostic image by controlling execution of a pulse sequence. The image generating unit generates an image by using data acquired by the first imaging scan. The deriving unit derives an imaging scan area in which data for the diagnostic image are acquired in the second imaging scan and a related area set associated with the imaging scan area in the second imaging scan, based on image processing using the image.

Abstract: An NMR probe head with an MAS stator (1) supplied with microwave radiation from a microwave guide (9) through an opening in a coil block (2) has a microwave lens (6) and a microwave mirror (8a) on an inner side of the MAS stator. The MAS rotor (3) is surrounded by a solenoid RF coil (5) and the microwave lens is arranged and embodied in the opening of the coil block on the side facing a sample volume (4) such that the cylinder axis of the MAS rotor lies in the focus of the microwave lens. The microwave mirror is arranged on, or in, the inner wall of the MAS stator that lies opposite the microwave guide and has a cylindrical and concave structure, such that the microwave mirror focuses the microwave radiation incident from the sample volume onto the central axis of the MAS rotor.

Abstract: A light-trapping geometry enhances the sensitivity of strain, temperature, and/or electromagnetic field measurements using nitrogen vacancies in bulk diamond, which have exterior dimensions on the order of millimeters. In an example light-trapping geometry, a laser beam enters the bulk diamond, which may be at room temperature, through a facet or notch. The beam propagates along a path inside the bulk diamond that includes many total internal reflections off the diamond's surfaces. The NVs inside the bulk diamonds absorb the beam as it propagates. Photodetectors measure the transmitted beam or fluorescence emitted by the NVs. The resulting transmission or emission spectrum represents the NVs' quantum mechanical states, which in turn vary with temperature, magnetic field strength, electric field strength, strain/pressure, etc.

Abstract: An electric properties tomography method for reconstructing a spatial distribution of electric conductivity (?) from magnetic resonance image data representative of a magnetic resonance image of at least a portion of a subject of interest (20), the spatial distribution covering at least a portion of the area of the magnetic resonance image, and the method comprising following steps:—segmenting the magnetic resonance image,—extrapolating acquired phase values, —replacing acquired phase values by the extrapolated phase values,—transforming into the frequency domain,—multiplying a frequency domain-transformed numerical second derivative by the acquired phase values and the frequency domain-transformed numerical second derivative by the extrapolated phase values, respectively, and—transforming the result of the multiplying into the spatial domain. Also covered are a corresponding MRI system and a software module.

Abstract: The invention provides for a subject support assembly (125) for a magnetic resonance imaging system (100, 200, 300, 400, 500). The subject support is operable for supporting a subject (118) within an imaging zone (108) of a magnet (104) of the magnetic resonance imaging system. The subject support is operable for supporting at least one radio frequency amplifier (124, 124?, 124?) outside of the imaging zone. The subject support is operable for supplying DC electrical power to the at least one radio frequency amplifier.

Abstract: A device includes a component operable at a temperature in a range of 3.5 to 6 Kelvin. The device further includes a thermal reflective sheet comprising a plurality of layers, wound around at least a portion of the component. The device also includes a coupling device for coupling the thermal reflective sheet to at least the portion of the component.

Abstract: A system and method for magnetic resonance imaging is provided. The method includes acquiring a plurality of echo signals relating to a region of interest of a subject at a number of echo times; generating a plurality of phase images based on the plurality of echo signals; generating an unwrapped phase map by performing a phase unwrapping correction to the plurality of phase images; generating a virtual phase map based on the unwrapped phase map; determining a phase mask based on the virtual phase map; obtaining magnitude information of the plurality of echo signals; and generating a susceptibility weighted image based on the phase mask and the magnitude information.

Abstract: Magnetic resonance imaging (MRI) systems and methods to effect improved and more efficient determination of the specific absorption rate (SAR) are described. The SAR is calculated based upon a derived relationship between a body surface area (BSA) and a portion of the total radio frequency (RF) energy delivered to RF transmit coil that is deposited in the imaging subject, and the scanning is controlled in accordance with the calculated SAR.

Abstract: A method of configuring a conducting grid of elements interconnected at intersecting nodes by switches is described.

Abstract: The present invention relates to a magnetic field adjustment system for use in a magnetic resonance imaging (MRI) system and a respective method. The magnetic field adjustment system comprises a first magnetic field generating assembly and an additional assembly. Wherein the first magnetic field generating assembly is used for generating a first magnetic field required by the MRI; and the additional assembly, including a switch and a current branch line, is used for cooperating with the first magnetic field generating assembly to generate a second magnetic field required by the MRI.

Abstract: In a method, magnetic resonance apparatus, and pulse optimization computer for determining a pulse sequence for radial sampling of k-space in magnetic resonance imaging, the amplitudes and the increases with respect to time of readout gradients and phase gradients for individual sections of k-space are determined depending on an orientation of the respective section in k-space and depending on global maximum values of the amplitudes and the increases of the gradients on the physical axes.

Abstract: A magnetic resonance imaging system (78) includes a magnetic resonance imaging device (80), one or more processors (104), and a display (106). The magnetic resonance imaging device (80) includes a magnet (82), gradient coils (88), and one or more radio frequency coils (92). The magnet (82) generates a Bo field. The gradient coils (88) apply gradient fields to the Bo field. The one or more radio frequency coils (92) generate a radio frequency pulse to excite magnetic resonance and measure generated gradient echoes. The one or more processors (104) are configured to activate (116) the one or more radio frequency coils (92) to generate a series of radio frequency pulses spaced by repetition times and to induce magnetic resonance.

Abstract: A method for analyzing a geological formation having at least one hydrocarbon therein may include determining a total organic carbon mass over a depth range of the geological formation, and determining a mass fraction of the at least one hydrocarbon over the depth range of the geological formation based upon the total organic carbon mass. The method may further include determining a volume of the at least one hydrocarbon over the depth range of the geological formation, and determining a density of the at least one hydrocarbon over the depth range of the geological formation based upon the mass fraction and the volume of the at least one hydrocarbon.

Abstract: A method of designing a refocusing pulse or pulse train for Magnetic Resonance Imaging comprises the steps of: a) determining a phase-free performance criterion representative of a proximity between a rotation of nuclear spins induced by the pulse and a target operator, summed or averaged over one or more voxels of an imaging region of interest; and b) adjusting a plurality of control parameters of the pulse to maximize the phase-free performance criterion; wherein each target operator is chosen so the phase-free performance criterion takes a maximum value when the nuclear spins within all voxels undergo a rotation of a same angle ? around a rotation axis lying in a plane perpendicular to a magnetization field B0, called a transverse plane, with an arbitrary orientation; wherein the angle ? is different from M? radians, with integer M, preferably with ?<? radians and even preferably with ??0.9·? radians.

Abstract: A magnetic gradient coil (110) for a magnetic resonance imaging system (100, 200) is actively shielded. The magnetic gradient coil is operable for generating a magnetic field (504). The magnetic field has a cylindrical axis of symmetry (130). The gradient coil has a length (132) parallel with the cylindrical axis of symmetry. The magnetic gradient coil has an outer surface (134). The magnetic field includes an external magnetic field outside of the outer surface. The external magnetic field has at least four reduced field regions (136, 138, 140, 142) along the length where the modulus of the magnetic field is less than the average of the modulus of the magnetic field along the length.