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Class 324/312 - By spectrum storage and analysis


Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter wherein the nuclear resonant frequencies
No. of patents: 343
Last issue date: 10/04/2011


1                  
NumberTitleIssue Date
8030924Magnetic resonance imaging system
A magnetic resonance imaging system capable of conducting spectroscopic imaging with an improved SNR without degrading the spatial resolution includes edge-preserving filter processing means for spectroscopic imaging. The edge-preserving filter processing means exec...
10/04/2011
7906965Methods and apparatuses for estimating the elliptical cone of uncertainty
A magnetic resonance imaging scanner acquires diffusion-weighted imaging data. A reconstruction engine reconstructs the acquired diffusion-weighted imaging data into diffusion-weighted image representations. A diffusion tensor engine constructs a diffusion tensor ma...
03/15/2011
7772847Method and apparatus of MR imaging with two dimensional phase and magnitude correction
Phase and magnitude correction is performed in two dimensions to reduce ghosting in single shot and multi-shot EPI scans. First, a phase/magnitude correction in the readout direction is carried out to reduce echo shifts and gradient waveform distortions. Then, a two...
08/10/2010
7642778MRI apparatus
An MRI apparatus for performing an MRI examination to an object by sequentially applying an imaging method group, which is constituted by time-sequentially arranging a plurality of different imaging methods, to each of the imaging methods, has an imaging method grou...
01/05/2010
7619411Generalized 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 with the MRI system using a pulse sequence with an individual associated...
11/17/2009
7538550Magnetic resonance imaging apparatus, magnetic resonance imaging method, scan apparatus, program and storage medium
With the objective of reducing the number of times that RF pulse are idle-shot during an idling time upon executing an SSFP pulse sequence by a phase cycling method and thereby performing imaging efficiently, the angle of the phase of each RF pulse is changed during...
05/26/2009
7511496Quadrupole resonance using narrowband probes and continuous wave excitation
The use of a superconducting resonator with continuous-wave (CW) excitation allows low-noise quadrupole resonance (QR) detection without the need for a lock-in amplifier. This allows detection times to be greatly reduced. Hence, for the first time, a CW QR spectrome...
03/31/2009
7429860Noise reduction for spectroscopic signal processing
A windowed noise reduction technique is presented that allows a noise-reduced spectrum of satisfactory accuracy to be recovered from original noisy spectroscopic data, while acquiring a significantly reduced number of transient acquisitions. The signal-averaged, dec...
09/30/2008
7418287Magnetic resonance imaging method with accelerated data acquisition
A method of dynamic magnetic resonance imaging comprising acquiring undersampled magnetic resonance signals for successive temporal time slots. In a space spanned by geometrical space and temporal frequency and on the basic of a priori information the aliased differ...
08/26/2008
7375520Method for spectrally selective B1 insensitive T2 preparation contrast enhancement for high field magnetic resonance imaging
A T2 preparation sequence uses a segmented BIR-4 adiabatic pulse with two substantially equal delays and is insensitive to B1 field variations and can simultaneously suppress fat signals with low specific absorption rate (SAR). An adiabatic rev...
05/20/2008
7372265Compensation of magnetic field disturbances due to vibrations in an MRI system
A magnetic resonance imaging (MRI) system includes an examination volume (9), a main magnet system (17) for generating a main magnetic field (B0) in the examination volume, a gradient magnet system (25) for generating gradients of the...
05/13/2008
7366358Method of and system for generating image signal
An original image including therein a predetermined periodic pattern is read out by sampling the original image at a frequency higher than a desired sampling frequency, and an initial image signal is thus obtained. The initial image signal is then re-sampled at the ...
04/29/2008
7358728Magnetic resonance imaging apparatus and magnetic resonance imaging data processing method
A magnetic resonance imaging apparatus 20 includes a phase difference calculation unit 44 configured to perform a one-dimensional Fourier transform on complex data not phase-encoded extracted from complex data of a nuclear resonant signal collected by ...
04/15/2008
7359745Method to correct magnetic field/phase variations in proton resonance frequency shift thermometry in magnetic resonance imaging
PRF shift MRI data is acquired. The PRF shift MRI data may include signals affected by both a desired PRF shift and an undesired PRF shift. Thus, example systems and methods describe manipulating the PRF shift MR! data to make it substantially free of the effects of...
04/15/2008
7348775Method for automatic shimming for nuclear magnetic resonance spectroscopy
A method for homogenizing a static magnetic field with a magnetic field distribution B0(r) for nuclear magnetic resonance spectroscopy by adjusting the currents Ci through the shim coils, thus creating spatial field distributions Ci·S
03/25/2008
7339377Methods and devices for analysis of sealed containers
This invention provides methods, NMR probes, and NMR systems for the analysis of the contents of sealed food and beverage containers and the like. ...
03/04/2008
7336986Magnetic resonance imaging apparatus
An apparatus includes acquiring means for acquiring echo data of a plurality of views in which a phase difference between water and fat is 2π/m with spins within a subject brought to the SSFP state and repeating the acquisition for k=0 through M−1 with a step dif...
02/26/2008
7330575Determination of subencoding MRI coil sensitivities in a lower order magnetic field
A novel magnetic resonance imaging method is presented for forming an image of an object from a plurality of signals acquired by an array of receiver antennae, whereas prior to imaging a sensitivity map of each of the receiver antennae is provided, at least two adja...
02/12/2008
7330028Apparatus and method of simultaneous fat suppression, magnetization transfer contrast, and spatial saturation for 3D time-of-flight imaging
A pulse sequence for time-of-flight (TOF) magnetic resonance angiography (MRA) includes a fatsat segment, a magnetization transfer segment, and a spatial saturation segment that are applied by an MR apparatus to acquire MR data for image reconstruction with improved...
02/12/2008
7327141Characterization of receiver demodulation for correcting off-axis MR imaging degradation
A calibration procedure is performed prior to an off-axis MR scan to measure the MRI system timing errors in applying a frequency modulation waveform to the system receiver. Phase errors which otherwise occur when performing non-Cartesian scans are either prospectiv...
02/05/2008
7288937Image generating method and MRI apparatus
A method of generating an MR image based on respective data obtained by n (≧2) coils, respective low resolution images are generated using partial data in a low frequency region for the data obtained by the n coils. The intensities and phases of the low resolution...
10/30/2007
7283859Artifact suppression in dynamic magnetic resonance imaging
A method for removing one or more artifacts from a time series of magnetic resonance (MR) images is provided. In one embodiment of the invention, an MR time series of data sets is acquired while changing the k-space that is sampled at each time frame. By using the a...
10/16/2007
7279892Calibrating method for artifact-reduced MRT imaging when there is FOV displacement
The present invention relates generally to nuclear magnetic resonance tomography (synonym: magnetic resonance tomography—MRT) as used in medical applications for examining patients; it relates in particular to a calibrating method when there is FOV displacement wi...
10/09/2007
7277807Method for processing a set of spectra, particularly NMR spectra
A method for processing a set of spectra, particularly NMR spectra, by selecting a principle spectral range, recording a plurality of principle spectra in the principal spectral range, obtaining a reference principal spectrum in the principal spectral range, carryin...
10/02/2007
7259557Method and apparatus of echo planar imaging with real-time determination of phase correction coefficients
The present invention provides an apparatus and method of phase correction whereby changes in phase characteristics are measured during data acquisition and, accordingly, phase correction parameters that are applied during image reconstruction are updated in real-ti...
08/21/2007
7256579Method for imaging biological matter using an adiabatic pulse
The present invention includes a method for MR imaging of a biological matter having H2O17 content by performing T1ρoff imaging of said H2O17 content in said biological matter. The T1ρ
08/14/2007
7254623Method and apparatus for reducing x-ray dosage in CT imaging prescription
The present invention is directed to a networked scanner environment wherein each scanner is communicatable with one or more databases configured to store data associated with previously executed imaging sessions. The one or more databases may be queried by a user t...
08/07/2007
7242402Method of visualization of a part of a three-dimensional image
The invention concerns a method of visualization of a part of a three-dimensional image. The part is defined by a finite predetermined volume, a sphere, for example, the center of which is located on an element of interest present in the three-dimensional image. In ...
07/10/2007
7236816Biopsy and sampling needle antennas for magnetic resonance imaging-guided biopsies
Herein is disclosed a magnetic resonance imaging antenna, including an inner conductor, an outer shield slideably displaceable with respect to the inner conductor, and an insulator electrically insulating the inner conductor from the outer shield. Herein is disclose...
06/26/2007
7215190Magnetic resonance imaging method involving sub-sampling
In a magnetic resonance imaging method magnetic resonance signal samples are received for a predetermined field of view by a receiving antenna having a spatial sensitivity profile. The sampling in the k space corresponds to the predetermined field of view in the geo...
05/08/2007
7215119Method and MR apparatus for dynamic frequency detection in MR spectroscopy
In a method for dynamic frequency detection of the resonance frequency in magnetic resonance spectroscopy, by measuring navigator signals at the same point in time in each of a number of successive sequence passes, and by comparing the navigator signals, a frequency...
05/08/2007
7205763Movement-corrected multi-shot method for diffusion-weighted imaging in magnetic resonance tomography
In a multi-shot method for diffusion-weighted imaging in magnetic resonance tomography, the sampling of the k-matrix in the readout direction ensues in segments, and immediately after acquisition of an image data set by readout of one segment by means of echo signal...
04/17/2007
7191301ROM addressing method for an ADPCM decoder implementation
A micro-controller is connected between a hardware-based adaptive differential pulse code modulation (ADPCM) decoder and a read only memory (ROM) storing both micro-controller programming instructions and ADPCM encoded source file data. A micro-controller architectu...
03/13/2007
7180293MRI apparatus
For the purpose of providing an MRI apparatus which gives rise to no phase deviation due to frequency alteration of the RF magnetic field and signals for detection use, the MRI apparatus includes: signal collecting means which detects and collects magnetic resonance...
02/20/2007
7170288Parametric nuclear quadrupole resonance spectroscopy system and method
A system and method for probing a specimen to determine one or more components by utilizing a first signal to excite the specimen at a nuclear quadrupole resonant frequency and observing changes in a specimen property. One exemplary property may be dielectric consta...
01/30/2007
7170290Systems and methods for generating a magnetic resonance image based on a difference between a plurality of signals
An MRI method comprising preparing at least two pulse sequence databases (PSDs) assumed to have the same echo time (TE) and different repetition times (TR), driving a magnet system of an MRI apparatus in accordance with the two PSDs and collecting MR signals at that...
01/30/2007
7154268Method and apparatus to improve an MRI image using regularization
An MRI imaging system includes at least one processor and a plurality of coils to acquire a plurality of k-space samples of a target to image. The system includes a machine-readable media comprising instructions which, when executed by the processor, result in deter...
12/26/2006
7135862NMR logging using time-domain averaging
Method for data acquisition and processing, which uses time-domain averaging to increase the signal to noise ratio (SNR) in single-event measurements. In a preferred embodiment, NMR echo-trains obtained using high-speed NMR logging are provided, the echo trains are ...
11/14/2006
7126332Downhole high resolution NMR spectroscopy with polarization enhancement
An apparatus and method is discussed for characterizing a fluid sample downhole of aliphatic hydrocarbon compounds, aromatic hydrocarbon compound, or connate mud filtrates containing carbon-13 isotopes using an enhanced nuclear magnetic resonance (NMR) signal on a m...
10/24/2006
7126336Nuclear magnetic resonance apparatus having a controllable detector
In an NMR apparatus having an analog-to-digital converter for converting the voltage signal V(t) to a digital signal, a reference signal generator for generating reference waves which are digital signals, and a quadrature detector for performing a quadrature detecti...
10/24/2006
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