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Class 324/306 - Determine fluid flow rate


Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter in which a fluid is magnetically tagged as
No. of patents: 461
Last issue date: 03/27/2012


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NumberTitleIssue Date
8143887Apparatus and method for real time and real flow-rate measurement of multi-phase fluids with MRI
A method for measuring flow rate of at least one fluid in a multi-phase fluid comprises: providing a magnetic resonance module through which the fluid phases flow and at least one pre-polarization module of variable effective length upstream of the magnetic resonanc...
03/27/2012
8085040Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the...
12/27/2011
8076934Black-blood steady-state free precession magnetic resonance imaging
In an imaging method, periodic maintenance radio frequency pulses (α, −α) are applied to maintain a steady state magnetic resonance excitation in an imaging region. Readout (66) of imaging data from the imaging region is performed during selected interval...
12/13/2011
8030919Dark blood balanced steady state free precession imaging
Systems, methods, and other embodiments associated with controlling a magnetic resonance imaging (MRI) apparatus to perform a balanced steady state free precession (bSSFP) technique that includes magnetization preparation with differentiated velocity encoding and sp...
10/04/2011
7994783Integrated microchip incorporating atomic magnetometer and microfluidic channel for NMR and MRI
An integral microfluidic device includes an alkali vapor cell and microfluidic channel, which can be used to detect magnetism for nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI). Small magnetic fields in the vicinity of the vapor cell can be me...
08/09/2011
7965079Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus includes a fluid image data acquisition unit and a flow velocity measuring unit. The a fluid image data acquisition unit acquires fluid image data, corresponding to mutually different inversion times, by imaging with applying a...
06/21/2011
7944205System for measuring a magnetic resonance signal based on a hybrid superconductive-magnetoresistive sensor
The system for measuring a magnetic resonance signal within a sample (4) placed in a static external magnetic field (H) includes an excitation device (1 to 3, 6 to 10) for applying high-intensity radio-frequency pulses at a predetermined ...
05/17/2011
7880465Method and apparatus for contrast inflow dynamic MR angiography
A system and method for MR imaging includes a computer programmed to determine first and second view-ordering sequences. The first and second view-ordering sequences comprise values corresponding to respective views of first and second k-space data sets, respectivel...
02/01/2011
7880464Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the...
02/01/2011
7872474Magnetic resonance based apparatus and method to analyze and to measure the bi-directional flow regime in a transport or a production conduit of complex fluids, in real time and real flow-rate
An apparatus and a method is provided based on the Magnetic Resonance techniques to analyze and measure a uni- and/or a bi-directional flow regime of multiphase fluids in a transport and production conduct, in real time and flow-rates, based on a magnetic resonance ...
01/18/2011
7847545System and method for correcting flow velocity measurements in phase contrast imaging using magnetic field monitoring
A system and method of phase contrast imaging includes a system control programmed to acquire a first set of data and a second set of data via the RF coil assembly during a scan and acquire a third set of data and a fourth set of data via the plurality of magnetic f...
12/07/2010
7825660Magnetic resonance imaging apparatus and magnetic resonance imaging method
An MRI apparatus includes an imaging signal acquisition unit, a motion signal acquisition unit, a motion amount determination unit, a motion correction unit and an image reconstruction unit. The imaging signal acquisition unit acquires MR signals as imaging signals....
11/02/2010
7755355Method and system of enhanced phase suppression for phase-contrast MR imaging
An automated image processing technique is disclosed that evaluates pixels of a phase-difference image to determine those pixels corresponding to inflowing phase data and background phase data. Phase-difference images are generated from a first acquisition and a sec...
07/13/2010
7705593Apparatus and method for detecting and classifying atherosclerotic plaque hemorrhage
A system and method for detecting atherosclerotic plaque hemorrhage includes a controller programmed to apply a non-selective inversion recovery RF pulse to a region of interest, apply a plurality of encoding sequences to the region of interest to cause generation o...
04/27/2010
7683613High pressure/high temperature magnetic resonance tool
The present invention pertains to an apparatus and method for conducting magnetic resonance measurements on fluids at high pressures and/or high temperatures. The apparatus can be used in conjunction with or as part of a downhole fluid sampling tool to perform NMR m...
03/23/2010
7573265Complex threshold method for reducing noise in nuclear magnetic resonance images
A method of removing noise while preserving signal in nuclear magnetic resonance images combines steps of performing a magnitude threshold filter and performing a phase threshold filter on the image data. Preferably, a magnitude and phase connectivity algorithm is a...
08/11/2009
7545142Arterial spin labeling with pulsed radio frequency sequences
In one aspect, a method for imaging fluid flow and/or perfusion using spin labeling is provided. The method comprises applying a first magnetic gradient sequence at least to a labeling region, applying a first pulsed radio frequency (RF) sequence to the labeling reg...
06/09/2009
7545141MRI apparatus and ASL imaging technique
An MRI apparatus obtains an ASL (Arterial Spin Labeling) image of a region to be imaged in a subject by performing a scan to the region to be imaged independently in a control mode and in a tag mode according to a pulse sequence based on an ASL technique. The pulse ...
06/09/2009
7501819Measurement apparatus and method
The invention relates to a method of determining the flow characteristics of a multiphase fluid along a flow path. The method involves applying a primary magnetic field to the flow of fluid in order to align the nuclei of the flow with the direction of this magnetic...
03/10/2009
7486071Fluid monitoring arrangement
A fluid monitoring arrangement 1 for an engine is operated in accordance with a method whereby nuclear magnetic resonance (NMR) interrogation of the fluid flow 3 it is possible to determine whether appropriate fluids and additives are being utilised as...
02/03/2009
7486072Parallel multiple coil MR scanning method and MRI apparatus with flow compensation in a calibration scan including a calibration of a coil sensitivity of each coil
The present invention provides an MR scanning method and an MRI apparatus for decreasing the artifacts while improving the signal from within the blood vessels in the parallel imaging. In the sequence for calibration data acquisition the, RF pulse of the flip angle ...
02/03/2009
7474096Magnetic resonance imaging apparatus
A magnetic resonance imaging apparatus which applies RF pulses to a subject placed on a top board which is moving in an imaging field in which a static magnetic field and gradient magnetic fields are formed, acquiring magnetic resonance signals emitted from the subj...
01/06/2009
7440791Double echo magnetic resonance imaging sequence and apparatus for the implementation thereof
In a magnetic resonance imaging method and apparatus, a double echo sequence having a gradient echo and a spin echo is implemented with a flow compensation for the gradient echo in at least one direction. The flow compensation gives the double echo sequence an insen...
10/21/2008
7432706Magnetic resonance imaging using blood flow navigation
An fMRI study is conducted using a 2D EPI pulse sequence. A separate blood flow navigator pulse sequence is interleaved with the fMRI data acquisition to monitor blood flow in arteries that feed the brain tissue. Information in the blood flow navigator data is used ...
10/07/2008
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
7417427Magnetic resonance data acquisition method and apparatus
In a method and magnetic resonance apparatus for acquisition of image data for a magnetic resonance image, the image data are acquired with an acquisition sequence, in which a k-space matrix corresponding to the image data is scanned in segments with at least two pa...
08/26/2008
7415364Process control architecture with hydrodynamic correction
Methods and systems for controlling processes related to the amount of fluid in a container subjected to externally-excited motions. Fluid level sensor measurements in processing tanks on-board boats are confused by ocean waves and swells. A hydrodynamic model of a ...
08/19/2008
7378845NMR methods for measuring fluid flow rates
A method for measuring fluid flow rates comprises the steps of: (a) creating a non-oscillating magnetic field of a predetermined strength across a flowing fluid; (b) performing the sub-steps of: (i) exposing the flowing fluid to an oscillating magnetic field pulse o...
05/27/2008
7372393Method and system for determining unwrapped phases from noisy two-dimensional wrapped-phase images
A method converts an input image of noisy wrapped phases to an output image of absolute unwrapped phases. The noisy wrapped phases in the input image are represented as a set of re-wrapped phases and a set of phase shifts. The set of re-wrapped phases are partitione...
05/13/2008
7369948System and methods for predicting failures in a fluid delivery system
A system for detecting defects in a fluid delivery line is provided, the system comprising a plurality of sensors disposed in a fluid delivery line, wherein each one of the plurality of sensors comprises a mote coupled to a plurality of sensing devices disposed in a...
05/06/2008
7369888Multi-slice cerebral blood flow imaging with continuous arterial spin labeling MRI
This invention is a method for multi-slice CBF imaging using continuous arterial spin labeling (CASL) with an amplitude modulated control which is both highly effective at controlling for off resonance effects, and efficient at doubly inverting inflow spins, thus re...
05/06/2008
7368910Dual gradient echo pulse sequence using interleaved spiral-out spiral-in k-space trajectories
Measurements of functional, hemographic, and blood flow parameters use a multiple echo or spin echo gradient pulse sequence whereby an early echo is acquired near the beginning of the pulse sequence which avoids saturation effects and a later echo near the end of th...
05/06/2008
7365543Magnetic resonance imaging apparatus and magnetic resonance imaging method
An MRI apparatus includes an imaging signal acquisition unit, a motion signal acquisition unit, a motion amount determination unit, a motion correction unit and an image reconstruction unit. The imaging signal acquisition unit acquires MR signals as imaging signals....
04/29/2008
7362099Randomized ordered k-space sub-sets for shared pre-pulses in MRI
A magnetic resonance imaging scanner (10) includes a main magnet (12), magnetic field gradient coils (16), and one or more radio frequency coils (18). A sequence generator (60, 62, 64, 66) generates an anti-ghosting imaging sequenc...
04/22/2008
7358730Diffusion tensor imaging using highly constrained image reconstruction method
Highly undersampled diffusion weighted image data sets are acquired for a plurality of different directions using a projection reconstruction pulse sequence. The acquired projection views are interleaved and are combined to form a more highly sampled data set that i...
04/15/2008
7348778System and apparatus for a high resolution peripheral vascular coil array
A peripheral vascular coil array for providing images of a region of interest includes a first section including a first coil array and a second coil array in electrical communication with each other. The first and second coil arrays are disposed at opposite sides o...
03/25/2008
7343193Background suppression method for time-resolved magnetic resonance angiography
A 3D projection reconstruction pulse sequence is employed during a CEMRA dynamic study to acquire a time course series of k-space data sets. Signals from non-vascular voxels are suppressed by reconstructing a corresponding series of low resolution images using the c...
03/11/2008
7340440Hybrid neural network generation system and method
A computer-implemented method and system for building a neural network is disclosed. The neural network predicts at least one target based upon predictor variables defined in a state space. First, an input data set is retrieved that includes the predictor variables ...
03/04/2008
7336072Method for representation of flow in a magnetic resonance image
In a method for representation of flow in a magnetic resonance image, a first magnetic resonance image of an examination subject is acquired, wherein the flow occurring in the examination subject is not compensated in a first spatial direction; a second magnetic res...
02/26/2008
7333846Method and apparatus for functional magnetic resonance imaging
In a method and a magnetic resonance apparatus for functional imaging, a number of images without and with a designational stimulation of the examination subject are sequentially registered in successive alternation, and an information value that indicates whether t...
02/19/2008
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