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955results about "Measurements using NMR" patented technology
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Thermal controlling method, magnetic field generator and MRI apparatus
InactiveUS20080048656A1Permanent magnetsInductances/transformers/magnets manufactureMagnetic polesRoom temperature
With a view toward implementing a thermal controlling method for making reversible a temperature characteristic of a magnetic field generator using permanent magnets small in Hcj, a magnetic field generator whose temperature characteristic is reversible, using permanent magnets small in Hcj, and an MRI apparatus provided with such a magnetic field generator, there is provided a method for controlling the temperature of a magnetic field generator having a pair of disc-shaped permanent magnets whose magnetic poles opposite in polarity to each other are opposed to each other with spacing defined therebetween, and a yoke that forms return passes for magnetic fluxes of the permanent magnets, comprising the steps of raising the temperature from room temperature to a temperature higher than the room temperature, maintaining the temperature higher than the room temperature, and lowering the temperature from the temperature higher than the room temperature to the room temperature, whereby the temperature characteristics of the permanent magnets are made reversible.
Owner:GE MEDICAL SYST GLOBAL TECH CO LLC
Method and apparatus for subterranean formation flow imaging
InactiveUS6856132B2Accurate measurementAccurately determineElectric/magnetic detection for well-loggingMaterial analysis by using resonanceMri imageGeophysics
The present invention relates to a method and apparatus for measuring a property relating to fluid flow in an earth formation, more specifically to directly measuring formation permeability and other fluid characteristics. The present invention provides a method for determining the permeability of a hydrocarbon bearing earth formation, which method comprises the steps of: locating a tool at a selected position in a borehole penetrating the earth formation; inducing a flow of fluid within the earth formation to said tool; creating at least two MRI images of said fluid while flowing within the earth formation to said tool, said at least two images being created at different times; determining displacement of said fluid within the earth formation between said different times, using the at least two MRI images.
Owner:SHELL OIL CO
Method and apparatus for shielding a linear accelerator and a magnetic resonance imaging device from each other
InactiveUS20110012593A1Improve permeabilityReduce flux densityDiagnostic recording/measuringSensorsSplit magnetResonance
A radiation therapy system comprises a magnetic resonance imaging (MRI) system combined with an irradiation system, which can include one or more linear accelerators (linacs) that can emit respective radiation beams suitable for radiation therapy. The MRI system includes a split magnet system, comprising first and second main magnets separated by gap. A gantry is positioned in the gap between the main MRI magnets and supports the linac(s) of the irradiation system. The gantry is rotatable independently of the MRI system and can angularly reposition the linac(s). Shielding can also be provided in the form of magnetic and / or RF shielding. Magnetic shielding can be provided for shielding the linac(s) from the magnetic field generated by the MRI magnets. RF shielding can be provided for shielding the MRI system from RF radiation from the linac.
Owner:VIEWRAY TECH
NMR device for detection of analytes
ActiveUS20070116602A1Add waterHigh sensitivityMaterial analysis by electric/magnetic meansAnalysis using nuclear magnetic resonanceTarget analysisPoint of care
This invention relates generally to detection devices having one or more small wells each surrounded by, or in close proximity to, an NMR micro coil, each well containing a liquid sample with magnetic nanoparticles that self-assemble or disperse in the presence of a target analyte, thereby altering the measured NMR properties of the liquid sample. The device may be used, for example, as a portable unit for point of care diagnosis and / or field use, or the device may be implanted for continuous or intermittent monitoring of one or more biological species of interest in a patient.
Owner:T2 BIOSYST
Systems and methods for NMR logging
ActiveUS20050030021A1Add depthAccurate estimateElectric/magnetic detection for well-loggingMaterial analysis by using resonanceEngineeringPole piece
An NMR logging tool for conducting NMR measurements in a plurality of sensitive volumes ranging up to a meter from the tool. The tool comprises a magnetic assembly using one or more permanent magnets and at least one pole piece for extending a magnet pole and shaping the magnetic field to simulate a magnetic monopole in a sensitive volume within the formation. Different embodiments of a segmented antenna enable directional NMR logging. The tool embodiments and methods of their use are suitable for wireline or LWD logging, and can be used for directional drilling.
Owner:HALLIBURTON ENERGY SERVICES INC
Methods and computer program products for determining risk of developing type 2 diabetes and other insulin resistance related disorders
InactiveUS6518069B1Facilitate early detectionAvoid spendingDisease diagnosisAnalysis using nuclear magnetic resonanceDiseaseData set
Methods for assessing the risk of developing Type 2 diabetes and other related disorders include obtaining an NMR derived reference spectrum for a known glucose concentration sample and storing this information as a reference standard. A patient blood sample is collected and NMR derived patient spectrums for the blood sample are obtained. The two NMR data sets (the reference and the patient) are compared and a glucose concentration is determined for the patient sample. The glucose concentration can be evaluated with a blood sample undergoing lipoprotein cholesterol evaluation. The NMR based test can be used to concurrently provide a glucose concentration and lipoprotein constituent values based on a single testing event. The disclosure also includes a multi-purpose test, i.e., a test which concurrently provides lipoprotein screening and coronary heart disease risk evaluation along with a diabetes screening and risk assessment for developing Type 2 diabetes. A method for assessing diabetes includes identifying the presence of diabetic dyslipidemia based on the values of predetermined NMR measured lipoprotein constituents.
Owner:LIPOSCI +1
Automated testing of seeds
Owner:MONSANTO TECH LLC
Method and apparatus for subterranean formation flow imaging
InactiveUS20040090230A1Accurately determine formation parameterAccurate measurementElectric/magnetic detection for well-loggingMaterial analysis by using resonanceMri imageGeophysics
The present invention relates to a method and apparatus for measuring a property relating to fluid flow in an earth formation, more specifically to directly measuring formation permeability and other fluid characteristics. The present invention provides a method for determining the permeability of a hydrocarbon bearing earth formation, which method comprises the steps of: locating a tool at a selected position in a borehole penetrating the earth formation; inducing a flow of fluid within the earth formation to said tool; creating at least two MRI images of said fluid while flowing within the earth formation to said tool, said at least two images being created at different times; determining displacement of said fluid within the earth formation between said different times, using the at least two MRI images.
Owner:SHELL OIL CO
NMR device for detection of analytes
ActiveUS20090134869A1Add waterHigh sensitivityAnalysis using nuclear magnetic resonanceElectric/magnetic detectionTarget analysisPoint of care
This invention relates generally to detection devices having one or more small wells each surrounded by, or in close proximity to, an NMR micro coil, each well containing a liquid sample with magnetic nanoparticles that self-assemble or disperse in the presence of a target analyte, thereby altering the measured NMR properties of the liquid sample. The device may be used, for example, as a portable unit for point of care diagnosis and / or field use, or the device may be implanted for continuous or intermittent monitoring of one or more biological species of interest in a patient.
Owner:T2 BIOSYST
Downhole high resolution NMR spectroscopy with polarization enhancement
InactiveUS7126332B2Increase amplitudeElectric/magnetic detection for well-loggingMeasurements using double resonanceSignal onProton NMR
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 measurement-while-drilling device. To enhance the carbon-13 NMR signal these nuclei are being hyperpolarized. Either the Overhauser Effect (OE) or the Nuclear Overhauser Effect or optical pumping and the Spin Polarization Induced Nuclear Overhauser Effect (SPINOE) can serve as a mechanism for hyperpolarization of the carbon-13 nuclei.
Owner:BAKER HUGHES HLDG LLC
System, Process and Computer-Accessible Medium For Providing Quantitative Susceptibility Mapping
ActiveUS20130221961A1Overcome limitationsEnhanced magnetic resonance imagingSensorsElectric/magnetic detectionQuantitative susceptibility mappingComputer science
Exemplary quantitative susceptibility mapping methods, systems and computer-accessible medium can be provided to generate images of tissue magnetism property from complex magnetic resonance imaging data using the Bayesian statistical approach. The likelihood is constructed directly using the complex data. A prior is constructed from matching structures or information content in known morphology. The quantitative susceptibility map can be determined by, e.g., maximizing the posterior. Thus, according to the exemplary embodiment, system, method and computer-accessible medium can be provided for determining information associated with at least one structure. Using such exemplary embodiment, it is possible to receive signals associated with the structure(s), where the signals can include complex data that is in the complex domain.
Owner:MEDIMAGEMETRIC
System and method for clay typing using NMR-based porosity modeling
InactiveUS6646437B1Good estimateElectric/magnetic detection for well-loggingSeismology for water-loggingClay mineralsTyping
System and method for characterizing formation properties based on NMR measurements. NMR clay measurements of this invention distinguish between interstitial pore water and the water adsorbed by the clay minerals. The measurements can be used to determine the quantity of adsorbed water in different clays and correct previously available data obtained using conventional density and neutron porosity logs. A new petrophysical parameter wetness clay is defined as an intrinsic parameter for clays, and its value is computed for members of the smectite group of clays, such as montmorillonite. The wet clay values for the density, neutron logs based on the adsorbed water in clays are used to enhance the quality and accuracy of the overall log interpretation.
Owner:HALLIBURTON ENERGY SERVICES INC
Self-shielded gradient coil
ActiveUS20110121832A1Reduce eddy currentTotal current dropElectric/magnetic detectionMeasurements using NMRElectrical conductorEddy current
Gradient coil assemblies for horizontal magnetic resonance imaging systems (MRIs) and methods of their manufacture. Some embodiments may be used with open MRIs and can be used with an instrument placed in the gap of the MRI. In general, concentrations of conductors or radially oriented conductors may be moved away from the gap of the MRI so as to reduce eddy currents that may be induced in any instrument placed within the gap. Systems for directly cooling primary gradient and shield coils may be utilized and various coil supporting structures may be used to assist in coil alignment or to facilitate use of an instrument in the MRI gap.
Owner:VIEWRAY TECH
Method and apparatus for using pulsed field gradient NMR measurements to determine fluid properties in a fluid sampling well logging tool
InactiveUS20050270023A1Easy to detectRaise the ratioElectric/magnetic detection for well-loggingSurveyDiffusionNMR - Nuclear magnetic resonance
A method for determining a formation fluid property includes acquiring a suite of nuclear magnetic resonance (NMR) measurements of a fluid sample using a pulse sequence that includes pulsed field gradient pulses for encoding diffusion information, wherein each NMR measurement in the suite is acquired with a different value in a parameter in the pulsed field gradient pulses for producing a different diffusion effect, wherein the acquiring is performed in a formation fluid sampling tool in a borehole; inverting the suite of NMR measurements to produce a distribution function that relates diffusion properties of the fluid sample with an NMR property of the fluid sample; and determining the formation fluid property from the distribution function.
Owner:SCHLUMBERGER TECH CORP
Configurations for integrated MRI-linear accelerators
ActiveUS20100239066A1Electric/magnetic detectionChemical conversion by chemical reactionResonanceProton
The present invention provides a radiotherapy treatment apparatus that includes a treatment beam, a magnetic field disposed parallel collinear to the treatment beam, and a target that is disposed along the treatment beam. The treatment beam can be a charged particle beam, a proton beam, an electron beam, or a linear accelerator (Linac) beam. The magnetic field is from a magnetic resonance imager (MRI), a megavolt x-ray imager, or a kilovolt x-ray imager and is disposed to operate in coordination with operation of the treatment beam and to narrow the beam. The tumor is disposed to rotate with respect to the treatment beam and the magnetic field, or the treatment beam and the magnetic field are disposed to rotate up to 360° with respect to the target when mounted to a ring gantry. The apparatus can include a rotation angle dependent shim disposed to account for Earth's magnetic field.
Owner:RGT UNIV OF CALIFORNIA +1
Systems and methods for deep-looking nmr logging
ActiveUS20090072825A1Add depthAccurate estimateElectric/magnetic detection for well-loggingMaterial analysis by using resonanceNMR - Nuclear magnetic resonanceMagnetic poles
Owner:HALLIBURTON ENERGY SERVICES INC
Radio frequency atomic magnetometer
InactiveUS20100289491A1Enhance nuclear magnetizationEnhanced magnetizationElectric/magnetic detectionMeasurements using NMRRadio frequency signalLight beam
An atomic magnetometer is used to detect radio frequency magnetic fields, such as those generated in nuclear resonance experiments. The magnetometer is based on nonlinear magneto-optical rotation and pumps an atomic vapor into a quadrupole aligned state. Detection of the modulation of the polarization of a linearly polarized beam provides the radio frequency signal, which can then be processed to extract the component frequencies.
Owner:BUDKER DIMITRY +2
Cage in an mrd with a fastening/attenuating system
ActiveUS20120119742A1High gradientElectric/magnetic detectionMeasurements using NMRResonanceEngineering
A cage with a fastening system (1) in a magnetic resonance device (MRD) is disclosed, said cage in an MRD comprising (a) M pole pieces (45) (M≧2); (b) N side magnets (20) (N≧2), said side magnets substantially enclosing said pole pieces and thereby defining a magnetic envelope and enclosed volume therein; (c) N side walls (10), said side walls substantially enclosing said side magnets; (d) P face walls (30) (P≧2); and (e) a plurality of fastening rods (100); wherein each of said fastening rods physically interconnects at least one pair of side walls, passing through at least one of said side magnets and at least one of said pole pieces.
Owner:ASPECT IMAGING
Method and apparatus for combined NMR and formation testing for assessing relative permeability with formation testing and nuclear magnetic resonance testing
InactiveUS20040055745A1Electric/magnetic detection for well-loggingSurveyProduction rateNMR - Nuclear magnetic resonance
Formation testing, resistivity and NMR measurements are used concurrently to determine a relative permeability representative of a formation surrounding the borehole. A method and apparatus is provided for accurate determination of the relative permeability for a formation by measuring saturation levels in a region of interest determined from resistivity or NMR readings versus time during formation draw down pressure testing. The method and apparatus determines and effective permeability over time for various saturation levels to determine the relative permeability for the formation at each saturation level and also enables determination of the efficacy of utilizing completion fluids in the formation to increase formation productivity. The method and apparatus enables more accurate determination of effective permeability and the irreducible saturation level. The method and apparatus also provides for determination of whether a pad is sealed properly against a borehole wall and determines if a probe is clogged.
Owner:BAKER HUGHES INC
Neonate's incubator and MRI docking-station
A docking-station useful for providing a neonate predefined, continuous, stabilized and non-interrupted life-support environmental conditions, comprising of: (i) a neonate incubator, having at least one first opening and a life support system, and (ii) an imaging-device, having a scanning chamber with at least one second opening. The docking-station is configured such that said neonate incubator first opening and said scanning chamber second opening are juxtapose-able so as to reversibly hermetically communicate; thereby providing said neonate predefined, continuous, stabilized, non-interrupted life-support environmental conditions during the entire process of scanning.
Owner:ASPECT IMAGING
Magnetic resonance imaging system comprising a power supply unit adapted for providing direct current electrical power
ActiveUS20110210739A1Batteries circuit arrangementsElectric powerAC - Alternating currentData acquisition
A MRI system for acquiring MRI image data comprising a data acquisition means comprising a plurality of subunits for acquiring MRI image data, a power distribution means for providing the means for acquiring MRI image data with electrical power, the power distribution means comprising: a power supply unit adapted for providing direct current electrical power from an alternating current electrical mains, a power bus adapted for supplying the subunits with the direct current electrical power, control means for controlling the supply of direct current electrical power by the power bus to the subunits.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Method and apparatus for using pulsed field gradient NMR measurements to determine fluid properties in a fluid sampling well logging tool
InactiveUS7053611B2Easy to detectRaise the ratioElectric/magnetic detection for well-loggingSurveyDiffusionNMR - Nuclear magnetic resonance
A method for determining a formation fluid property includes acquiring a suite of nuclear magnetic resonance (NMR) measurements of a fluid sample using a pulse sequence that includes pulsed field gradient pulses for encoding diffusion information, wherein each NMR measurement in the suite is acquired with a different value in a parameter in the pulsed field gradient pulses for producing a different diffusion effect, wherein the acquiring is performed in a formation fluid sampling tool in a borehole; inverting the suite of NMR measurements to produce a distribution function that relates diffusion properties of the fluid sample with an NMR property of the fluid sample; and determining the formation fluid property from the distribution function.
Owner:SCHLUMBERGER TECH CORP
Active signal conditioning circuitry for well logging and monitoring while drilling nuclear magnetic resonance spectrometers
InactiveUS6603309B2Electric/magnetic detection for well-loggingMaterial analysis by using resonanceNMR - Nuclear magnetic resonanceWell logging
NMR transmitter / receiver antenna active signal conditioning circuitry that enables receiver antenna circuit protection from high voltage RF transmitter pulses, provides energy dumping for the entire antenna in successive stages and eliminates re-tuning during sweeping of the antenna frequency.
Owner:BAKER HUGHES INC
Magnetic resonance imaging apparatus
ActiveUS20100117649A1Electric/magnetic detectionMeasurements using NMRCarrier signalSignal regeneration
An apparatus including a probe unit and a control / imaging unit, the probe unit including a converter converting a sampled magnetic-resonance signal into a digital signal, a first transmitter converting the digital signal into a first-radio signal, a first receiver receiving a second-radio signal, and performing detection on the second-radio signal to obtain a first-received signal, and a clock-regeneration unit regenerating a clock component from the first-received signal to generate a regenerated-clock signal, the control / imaging unit including a second-receiver receiving the first-radio signal to obtain a second-received signal, a data processor performing data processing on the second-received signal in synchronism with a reference-clock signal to obtain a video signal, and a second transmitter including a modulator modulating a carrier wave using the reference-clock signal, the second transmitter converting the reference-clock signal into the second-radio signal and transmitting the second-radio signal through the second-wireless channel.
Owner:TOSHIBA MEDICAL SYST CORP
Automated testing of seeds
Owner:MONSANTO TECH LLC
Method and apparatus for noise tomography
The subject invention pertains to an imaging technique and apparatus which can utilize an array of RF probes to measure the non-resonant thermal noise which is produced within a sample, such as a body, and produce a non-resonant thermal noise correlation. The detected noise correlation is a function of the spatial overlap of the electromagnetic fields of the probes and the spatial distribution of the conductivity of the sample. The subject technique, which can be referred to as Noise Tomography (NT), can generate a three-dimensional map of the conductivity of the sample. Since the subject invention utilizes detection of the thermal noise generated within the body, the subject method can be non-invasive and can be implemented without requiring external power, chemicals, or radionuclides to be introduced into the body. The subject imaging method can be used as a stand along technique or can be used in conjunction with other imaging techniques.
Owner:INVIVO CORP
Method for data acquisition acceleration in magnetic resonance imaging (MRI) using receiver coil arrays and non-linear phase distributions
InactiveUS20110148410A1Specifically designedIncrease freedomElectric/magnetic detectionMeasurements using NMRTransverse magnetizationData acquisition
A method for accelerating data acquisition in MRI with N-dimensional spatial encoding has a first method step in which a transverse magnetization within an imaged object volume is prepared having a non-linear phase distribution. Primary spatial encoding is thereby effected through application of switched magnetic fields. Two or more RF receivers are used to simultaneously record MR signals originating from the imaged object volume, wherein, for each RF receiver, an N-dimensional data matrix is recorded which is undersampled by a factor Ri per selected k-space direction. Data points belonging to a k-space matrix which were not recoded by a selected acquisition schema are reconstructed using a parallel imaging method, wherein reference information concerning receiver coil sensitivities is extracted from a phase-scrambled reconstruction of the undersampled data matrix. The method generates a high-resolution image free of artifacts in a time-efficient manner by improving data sampling efficiency and thereby reducing overall data acquisition time.
Owner:UNIVERSITATSKLINIKUM FREIBURG
Transceiver apparatus, system and methodology for superior In-Vivo imaging of human anatomy
ActiveUS20120112748A1Maximize efficiencyElectric/magnetic detectionMeasurements using NMRHuman anatomyDisease
The inventive subject matter as a whole is an improved transceiver apparatus and system for diagnostic evaluations of living subject, human or animal; and is particularly effective as a clinical tool for the spectroscopic scanning or magnetic resonance imaging of humans suspected of being afflicted with a particular disease, disorder, or pathology. The improved transceiver apparatus is used as an essential component in a computer controlled system suitable for magnetic resonance imaging (“MRI”), or nuclear magnetic resonance spectroscopy (“MRS”), and / or nuclear magnetic resonance spectroscopic imaging (“MRSI”); and the present improvement of these electromagnetic signaling systems will provide far more accurate and precise visual images and accumulated data for the clinician or surgeon, as well as serve as a basis upon which to make a diagnosis and decide upon a mode of therapeutic treatment for that individual.
Owner:HETHERINGTON HOBY P +2
Nuclear magnetic resonance tool using switchable source of static magnetic field
ActiveUS20060255799A1Effective permeability of magneticElectric/magnetic detection for well-loggingMaterial analysis by using resonanceSolid-state nuclear magnetic resonanceSpin magnetic moment
A nuclear magnetic resonance sensing apparatus and method for operating in an earth borehole comprises a source of switchable magnetic field to polarize nuclei in the region of interest, said source comprising a coil wound on a magnetic core having controllable residual magnetization. Maintaining the magnetization of the core during a polarization interval does not require steady current in the coil. Switching intensity and polarity of magnetization of the core causes precession of spin magnetic moments of the nuclei; the precession induces a signal indicative of nuclear magnetic resonance properties of earth formations.
Owner:BAKER HUGHES INC
Active transmit elements for MRI coils and other antenna devices
ActiveUS20120062230A1Efficient and flexibleAvoid lostElectric/magnetic detectionMeasurements using NMRCapacitanceTransceiver
Apparatus and method that includes amplifiers for transceiver antenna elements, and more specifically to power amplifying an RF (radio frequency) signal using a distributed power amplifier having electronic devices (such as field-effect transistors) that are thermally and / or mechanically connected to each one of a plurality of antenna elements (also called coil elements) to form a hybrid coil-amplifier (e.g., for use in a magnetic-resonance (MR) imaging or spectroscopy machine), and that is optionally adjusted from a remote location, optionally including remotely adjusting its gains, electrical resistances, inductances, and / or capacitances (which controls the magnitude, phase, frequency, spatial profile, and temporal profile of the RF signal)—and, in some embodiments, the components are compatible with, and function in, high fields (such as a magnetic field of up to and exceeding one tesla or even ten tesla or more and / or an electric field of many thousands of volts per meter).
Owner:RGT UNIV OF MINNESOTA +1
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