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7620440 |
Direct temporal encoding of spatial information
An improved imaging technique and apparatus for direct temporal encoding of spatial information of an object is presented. The signal collected from the object after application of excitation...
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7619413 |
Transmit-receive array for high field MRI
A multi-element MRI head coil is formed in the shape of a helmet that fits over the head of a subject to be imaged. The coil elements are separately driven by rf transmit channels during an MR scan...
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7619412 |
MRI apparatus and high-frequency coil with plural imaging regions
A high-frequency coil for a magnetic resonance imaging apparatus includes two end members formed of a conductive material and arranged opposite to each other. A plurality of rod members, each of...
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7619411 |
Generalized method for MRI chemical species separation using arbitrary k-space trajectories
A method for producing images of a subject containing M spin species using a magnetic resonance imaging (MRI) system includes obtaining N k-space data matrices from N k-space data sets acquired...
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7619410 |
System and method for accelerated magnetic resonance parallel imaging
A system and method for MR imaging includes the use of a form of autocalibrated parallel imaging. By combining a segmented, rotated acquisition trajectory with autocalibration parallel imaging...
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7612561 |
Magnetic resonance diagnosing apparatus and its operating method
A magnetic resonance diagnosing apparatus includes a generating unit which generates a plurality of slice images of a object for an imaging region, a determining unit which determines a plurality...
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7610077 |
Quantitation of sample properties using contrast enhancement from saturation transfer
The manipulation of RF irradiation to a subject in which a CEST agent has been administered is employed to determine a biological parameter in vivo in conjunction with an MRI imaging process. The...
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7609059 |
Magnetic resonance method and apparatus with nuclear spins type-specific signal suppression
A method in the form of a sequence for magnetic resonance imaging with which image data of a subject to be examined are acquired and with which signals of nuclear spins of a specific type are...
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7606610 |
Rapid three-dimensional magnetic resonance angiography
A method for imaging a patient. An apparatus for imaging a patient including a magnetic resonance imager having a controller and a memory in communication with the controller. The controller causes...
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7603157 |
Method and magnetic resonance imaging apparatus for compensating contrast inhomogeneities in magnetic resonance images
In a method and magnetic resonance apparatus for compensation of contrast inhomogeneities in magnetic resonance images caused by spatial distributions of the radio frequency field associated with...
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7602189 |
Magnetic resonance examination platform with independently moveable bed and antenna device
An examination platform for a magnetic resonance apparatus has a patient bed for supporting a patient, a local antenna device for acquisition of magnetic resonance signals, and a drive device...
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7602186 |
RF coil system for an MRI system with a fixed coil and with a moving coil part below the patient support
The present invention relates to an RF system for a magnetic resonance imaging device ( 13 ). The RF system comprises an RF transmitter coil subsystem and an RF receiver coil subsystem ( 18 ),...
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7602185 |
Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus performs photographing by magnetic resonance imaging using hardware of which temperature is likely to rise due to a photographing operation. The magnetic...
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7602184 |
Magnetic resonance spectroscopic imaging with short echo times
Radio frequency (rf) pulses are applied to a sample to produce magnetic resonance (MR) echo signals from the sample at multiple different echo times. Magnetic field gradients are applied to the...
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7602183 |
K-T sparse: high frame-rate dynamic magnetic resonance imaging exploiting spatio-temporal sparsity
A method of dynamic resonance imaging is provided. A magnetic resonance imaging excitation is applied. Data in 2 or 3 spatial frequency dimensions, and time is acquired, where an acquisition order...
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7602180 |
System and method for fast texture-based tensor field visualization for DT-MRI
A method for visualizing diffusion-tensor magnetic resonance images, including the steps of providing a diffusion-tensor magnetic resonance image (DT-MRI) volume, positioning and orienting a...
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7598737 |
Method and control device for determination of the position of a local coil in a magnetic resonance apparatus
In a method for determination of a position of a local coil on a bed in at least one spatial direction within a magnetic resonance scanner, a signal intensity value is initially, extracted from...
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7596402 |
MRI probe designs for minimally invasive intravascular tracking and imaging applications
A probe suitable for attachment to, or incorporation in, a medical interventional device, such as a catheter, and which may be employed for tracking, imaging, or both, includes a first material...
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7592810 |
MRI methods for combining separate species and quantifying a species
A method for generating a magnetic resonance images is provided. A first species signal for a first species is generated from magnetic resonance data. A second signal is generated from the magnetic...
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7592809 |
Hybrid k-t method of dynamic imaging with improved spatiotemporal resolution
Variable-density (VD), sequentially-interleaved sampling of k-space coupled with the acquisition of reference frames of data is carried out to improve spatiotemporal resolution, image quality, and...
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7592806 |
Double half RF pulses for reduced sensitivity to eddy currents in UTE imaging
A method for creating a magnetic resonance image of an object with at least a first species and a second species, wherein the first species has a first T 2 time and the second species has a second...
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7587231 |
Water fat separated magnetic resonance imaging method and system using steady-state free-precession
Water-fat separated magnetic resonance (MR) images with balanced steady-state free precession (SSFP) are produced. The acquired SSFP signals are isolated into multiple echo components in which the...
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7586306 |
Simultaneously cycled NMR spectroscopy
The present invention relates to a method for simultaneously conducting multiple steps of a cycle of a nuclear magnetic resonance (NMR) experiment without the use of pulsed magnetic field gradients...
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7583992 |
Magnetic resonance angiography with automated vessel segmentation
A magnetic resonance angiogram (MRA) is acquired using a contrast enhancement method in which a series of NMR images are rapidly acquired during a time resolved phase of the examination in which...
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7583082 |
Partially parallel magnetic resonance imaging using arbitrary k-space trajectories with image reconstruction based on successive convolution operations
In a first step of image formation by MRI or the like, a gridding convolution is performed for each coil using a Kaiser-Bessel kernel, so that each coil channel now contains data on grid points. In...
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7579834 |
Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus includes a data acquisition unit and an image data generating unit. The data acquisition unit acquires data according to a sequence derived by adding a...
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7576539 |
Method and apparatus for reconstructing parallel-acquired image
The invention discloses a method and an apparatus for reconstructing a parallel-acquired image, comprising: generating reconstruction data by combining uniformly under-sampled data and...
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7576538 |
Nuclear electric quadrupolar properties of hyperpolarized gases to probe surfaces and interfaces
Methods and related devices are provided for probing a surface by application of a hyperpolarized noble gas having a nuclear electric quadrupole moment to the surface. In an embodiment, the...
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7576537 |
RF pulse applying method with an MRI apparatus which reduces vertical magnetization
The present invention aims to receive a signal of tissue long in T2 at a relatively high level and suppress artifacts. When a magnetic resonance frequency of a component intended for measurement is...
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7576536 |
MRI method and apparatus for adaptive channel reduction in parallel imaging
The subject invention pertains to method and apparatus for parallel imaging. The subject method can be utilized with imaging systems utilizing parallel imaging techniques. In a specific embodiment,...
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7576535 |
Multi-compartment separation in magnetic resonance using transient steady-state free precession imaging
Disclosed is a method of quantitatively separating tissue signals based on relaxation time differences. The method uses the transient signal decay in steady-state free precession (balanced SSFP)...
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7574248 |
Method and apparatus for quantitative bone matrix imaging by magnetic resonance imaging
An apparatus and technique for measuring volumetric, 3-D bone organic matrix density is described. The techniques includes providing a first pulse sequence fragment selected to suppress at least...
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7573269 |
Method and apparatus for acquiring magnetic resonance imaging data
A method for generating a magnetic resonance image of a moving subject comprises tracking the position and orientation of a target volume and modifying acquisition parameters for each line of...
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7573268 |
Direct imaging of neural currents using ultra-low field magnetic resonance techniques
Using resonant interactions to directly and tomographically image neural activity in the human brain using magnetic resonance imaging (MRI) techniques at ultra-low field (ULF), the present...
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7570985 |
Method and apparatus for magnetic resonance imaging using contrast agent
Monitor scans are performed before imaging scans with respect to a patient injected with a contrast agent. Magnetic resonance images of a plurality of slices of the patient are acquired, usually...
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7570054 |
Dynamic magnetic resonance inverse imaging using linear constrained minimum variance beamformer
An fMRI scan is performed using a multi-element head coil and multi-channel receiver to acquire time course image data. One imaging gradient is eliminated from the pulse sequence used to acquire...
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7570053 |
NMR measurement method
There is disclosed an NMR measurement method and NMR apparatus in which the temperature of the NMR detection coil or the RF irradiation coil hardly varies if pulsed RF power is applied to the coil...
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7570052 |
MRI imaging of an object in cyclic motion
A method of generating an MRI image of an object in cyclic motion by acquiring ky line data in a spaced apart fashion over ky space using a predefined order for line acquisition for each of a...
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7567081 |
Magnetic resonance non-balanced-SSFP method for the detection and imaging of susceptibility related magnetic field distortions
Disclosed are methods and apparatuses for generating susceptibility-related contrast images, as induced, e.g., by marker material interventional devices used for passive MR-guided interventions, or...
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7567080 |
Method for determining an integral sun protection factor encompassing UVA and UVB radiation
The invention relates to a method for determining an integral sun protection factor (∫ SPF or iSPF) which encompasses both UVA and UVB radiation and can be used for classifying cosmetic and...
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7564244 |
RF resonator system and method for tuning an RF resonator system
A radio-frequency (RF) resonator system, in particular, for a magnetic resonance (MR) probe, comprising at least one RF resonator with a substrate, on which a conductive structure is applied,...
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7564242 |
MR data acquisition method, MR image construction method, and MRI system
An MR data acquisition method for acquiring data D_φfat according to a steady-state pulse sequence specifying that a phase of an RF pulse is varied in order of 0, 1×φfat, 2×φfat, etc., wherein...
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7560926 |
b-value optimization for diffusion weighted magnetic resonance imaging
A method for selecting the b-values for diffusion weighted magnetic resonance scans. The method includes: identifying a single reference slice within a volume of interest (VOI); progressively...
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7560925 |
Multiple repetition time steady-state free precession imaging
A method of providing selective spectral suppression in balanced SSFP magnetic resonance imaging for a first and second species is provided. A plurality of balanced SSFP images are acquired. Each...
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7560924 |
Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus has a controller which controls an operation of a scan section in such a manner that the scan section executes a scan in an imaging sequence, based on the...
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7558614 |
Method and apparatus for improved transmission-side accelerated PPA-based volume-selective magnetic resonance imaging
In a method for determining transmission coil-specific RF excitation pulses for component coils of a transmission coil array for accelerated, PPA-based volume-selective magnetic resonance...
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7558613 |
Spatial encoding MR data of a moving subject using a higher-order gradient field
The present invention includes a technique for use with magnetic resonance imaging that includes the application of a non-linear, higher-order gradient field in the presence of a moving object to...
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7558414 |
Iterative image reconstruction
Systems and methods using an image produced by a constrained image reconstruction process as a constraint in a forward iterative reconstruction process are described. One example system may include...
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7557577 |
Water-soluble paramagnetic substance reducing the relaxation time of the coolant in an MRI system
The invention relates to the use of a water-soluble paramagnetic substance, in particular a magnetic resonance contrast medium, to reduce the magnetic resonance relaxation time of a coolant for...
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7557575 |
Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus includes a data acquisition unit, a frequency offset acquisition unit, a frequency modulation unit and a phase shift correction unit. The data acquisition...
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