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7627360 |
MRI apparatus, flow quantification apparatus, and flow quantification method for ASL imaging
An MRI apparatus is provided to quantify perfusion (microcirculatory blood flow in the tissue) in a region to be imaged in a subject based an ASL (arterial spin labeling) technique. The apparatus...
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7613496 |
Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus includes a blood flow velocity acquiring unit that acquires a flow velocity of the blood flow of an object, a capturing condition setting unit that, on the...
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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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7589529 |
Method of and apparatus for in-situ measurement of degradation of automotive fluids and the like by micro-electron spin resonance (ESR) spectrometry
A method of and miniaturized apparatus adapted for in-situ measurement of degradation of automotive fluids and the like by micro-electron spin resonance (ESR) spectrometry, wherein the use of a...
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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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7573265 |
Complex 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...
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7567079 |
Methods suitable for measuring capillary pressure and relative permeability curves of porous rocks
Single-shot methods suitable for determining capillary pressure and relative permeability curves in petroleum reservoir core plugs are proposed. Three classes of measurement are outlined. (i)...
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7545142 |
Arterial 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,...
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7545141 |
MRI 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...
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7541809 |
Magnetic resonance imaging apparatus
A magnetic resonance imaging apparatus which executes an imaging sequence for obtaining, as imaging data, magnetic resonance signals each generated from a spin excited at a subject within a static...
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7534208 |
Device for the measurement of glucose concentrations
The device of the present invention comprises a ring ( 1 ) of a ferrite material and two coils ( 4, 5 ) wound around it. A alternating current is fed to one of the coils ( 4 ). This current gives...
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7532007 |
Remote sensing nuclear magnetic resonance apparatus
An apparatus and methods that can be used to determine various qualitative parameters of an earth formation from nuclear magnetic resonance (NMR) measurements. One embodiment provides a method of...
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7528600 |
System and method for downhole time-of-flight sensing, remote NMR detection of fluid flow in rock formations
A system and method for measuring fluid flow in a wellbore in an earth formation using time-of-flight (TOF) sensing and remote detection nuclear magnetic resonance (NMR) techniques, by applying a...
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7508209 |
Magnetic resonance apparatus with a gradient coil unit with integrated passive shim devices
A magnetic resonance apparatus has a gradient coil unit with passive shim devices inserted into side receptacles in the molded body of the gradient coil unit. Each shim device has a carrier with a...
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7501819 |
Measurement 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...
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7501818 |
System and methods for T1-based logging
System and methods for using nuclear magnetic resonance (NMR) T 1 measurements for wireline, LWD and MWD applications and down-hole NMR fluid analyzers. The T 1 measurements are characterized by...
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7501817 |
Method and apparatus for generating an axisymmetric magnetic field
The present invention is directed to a nuclear magnetic resonance apparatus and method for generating an axisymmetric magnetic field having long, straight contour lines in the resonance region. A...
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7486072 |
Parallel 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...
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7486071 |
Fluid 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...
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7480576 |
Compensating for frequency change in flowmeters
Motion is induced in a conduit that contains a fluid. The motion is induced such that the conduit oscillates in a first mode of vibration and a second mode of vibration. The first mode of vibration...
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7480525 |
Positive contrast MRI using positive and negative field inhomogeneity
The acquisition of multiple images at slightly different time shifts from the spin echo (or from TE=0 for gradient echo sequences), allows the separation of on-resonance spins from off-resonance...
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7474096 |
Magnetic 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...
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7440791 |
Double 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...
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7432706 |
Magnetic 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...
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7418287 |
Magnetic 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...
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7417427 |
Magnetic 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...
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7415364 |
Process 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...
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7378845 |
NMR 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:...
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7369948 |
System 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...
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7368910 |
Dual 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...
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7358730 |
Diffusion 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...
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7343193 |
Background 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...
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7336072 |
Method 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...
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7333848 |
Method and system for evaluating vertebrobasilar disease
A method and system are disclosed for evaluating symptomatic VBD which uses quantitative hemodynamic assessment in order to identify patients at high risk for stroke and provide appropriate...
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7333846 |
Method 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...
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7317940 |
MRT apparatus, method and computer program product for determining the speed of a flowing medium
In a method for automatic determination of the actual speed interval of a flowing medium in flow measurements in magnetic resonance imaging, an overview image (localizer) is acquired displayed on a...
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7315756 |
Multi-slice double inversion-recovery black-blood imaging with simultaneous slice re-inversion
A multi-slice double inversion recovery (DIR) pulse sequence with read out of a signal for imaging successive slices implemented on a magnetic resonance image scanner. In the method, when the DIR...
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7313428 |
Method and apparatus for magnetic resonance arteriography using contrast agents
The present invention is a technique of, and system for, imaging vascular anatomy over distance considerably greater than the maximum practical field of view of a magnetic resonance imaging system...
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7308298 |
Magnetic resonance imaging using MT pulse of which duration is shorter
A magnetic resonance imaging technique provides adequate MT effects by applying a shortened MT pulse and scan time. An MT pulse whose frequency is off-resonance to a region to be imaged of an...
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7298142 |
Method and apparatus for reservoir fluid characterization in nuclear magnetic resonance logging
A method and apparatus for obtaining a parameter of interest relating to a region proximate a nuclear magnetic resonance (NMR) logging tool suitable for subterranean well logging is disclosed. The...
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7295006 |
Method for measuring nuclear magnetic resonance longitudinal axis relaxation time of blood and apparatus using the same
Disclosed are a method and apparatus for accurately measuring nuclear magnetic resonance (NMR) longitudinal axis relaxation time by minimizing the influence of the amount of blood. The method...
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7292032 |
Method 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....
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7283862 |
Rapid multi-slice MR perfusion imaging with large dynamic range
The present invention includes a method and apparatus to perform rapid multi-slice MR imaging without ECG gating or requiring breath-holding that is capable of renal profusion analysis and...
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7268552 |
Capillary toroid cavity detector for high pressure NMR
A Toroid Cavity Detector (TCD) is provided for implementing nuclear magnetic resonance (NMR) studies of chemical reactions under conditions of high pressures and temperatures. A toroid cavity...
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7268547 |
Correction of motion influences in NMR signals
An apparatus and method for compensating for the effect of tool motion in NMR MWD measurements. Signals obtained from a directionally sensitive receiver are compensated for the effects of tool...
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7265544 |
Method and device for detecting physical-chemical states on measuring electrodes of a flowmeter
A method and device for obtaining an interference free measurement from a flowmeter. The flowmeter includes a measuring tube through which a flowable medium flows through a magnetic field generated...
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7259558 |
Method for detection and imaging of synchronous spin and charged particle motion
A method of nuclear magnetic resonance (NMR) imaging is proposed for the rapid detection of oscillatory motion of spins or charged particles to generate shear waves or oscillating electrical...
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7256578 |
Magnetic resonance imaging system
A magnetic resonance imaging system includes a high-frequency magnetic field generating unit for generating and applying a high-frequency magnetic field to a subject placed in a static magnetic...
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7215119 |
Method 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...
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7205763 |
Movement-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...
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