Patents Examined by Rishi R Patel
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Patent number: 11125903Abstract: A method and system for nuclear magnetic resonance (NMR) sequence for partially polarized echo trains is provided. An NMR pulse sequence is applied into a wellbore penetrating a subterranean formation using a NMR tool. The NMR pulse sequence includes a first cycle and a second cycle. The first cycle includes a first sequence of radio frequency (RF) pulses of a first duration and a first trainlet sequence of a second duration different from the first duration. The second cycle includes a second sequence of RF pulses of the first duration and a second trainlet sequence of the second duration. The second sequence of RF pulses forms a phase alternated pair with the first sequence of RF pulses. Echo signals corresponding to a substance in the subterranean formation are measured based on the NMR pulse sequence. A distribution of a characteristic of the substance is determined based on the echo signals.Type: GrantFiled: January 3, 2018Date of Patent: September 21, 2021Assignee: Halliburton Energy Services, Inc.Inventor: Lilong Li
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Patent number: 11119171Abstract: Systems and methods for adaptive, multi-resolution magnetic resonance imaging (“MRI”), in which an MRI scan prescription is adaptively changed to acquire high-quality data from select regions-of-interest (“ROI”) in a larger field-of-view (“FOV”), are provided. The higher quality data can include data representing higher spatial resolution, higher signal-to-noise ratio (“SNR”), increased diffusion encoding via repeated acquisition with a larger number of diffusion-encoding directions, and so on. A composite image can be generated that displays the higher quality images of the ROIs overlaid on the larger FOV.Type: GrantFiled: July 16, 2015Date of Patent: September 14, 2021Assignee: SYNAPTIVE MEDICAL INC.Inventors: Cameron A. Piron, Jeff Stainsby, Chad Harris, Philip Beatty
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Patent number: 11116184Abstract: Shown herein is a method of automated noninvasive determining the fertility of a bird's egg (14), comprising the following steps: conveying a plurality of bird eggs (14) sequentially or in parallel into an NMR apparatus (18), subjecting the bird eggs (14) to an NMR measurement, such as to generate a 3-D NMR image of at least a part of each of said eggs (14), said 3-D NMR image having a spatial resolution in at least one dimension of 1.0 mm or less, preferably of 0.Type: GrantFiled: November 13, 2018Date of Patent: September 14, 2021Assignee: TECHNISCHE UNIVERSITÄT MÜNCHENInventors: Pedro A. Goméz, Miguel Molina-Romero, Axel Haase, Benjamin Schusser, Maximilian Aigner, Maria Laparidou
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Patent number: 11112478Abstract: The invention provides for a magnetic resonance imaging system (100) for acquiring MRF magnetic resonance data (144) from a subject (118) within a region of interest (109). The magnetic resonance imaging system comprises a processor (130) for controlling the magnetic resonance imaging system and a memory (134) for storing machine executable instructions (140) and MRF pulse sequence commands (142). The MRF pulse sequence commands are configured for controlling the magnetic resonance imaging system to acquire the MRF magnetic resonance data according to a magnetic resonance fingerprinting protocol.Type: GrantFiled: March 30, 2018Date of Patent: September 7, 2021Assignee: Koninklijke Philips N.V.Inventors: Peter Boernert, Thomas Erik Amthor, Mariya Ivanova Doneva, Fabian Wenzel
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Patent number: 11112373Abstract: Provided is a local slice selective T2 nuclear magnetic resonance (NMR) test procedure that includes: (1) identifying a location of a fracture within a core plug; (2) conducting an initial local slice selective T2 NMR test on a slice of the plug that corresponds to the location to generate initial T2 measurements; (3) determining an initial fracture pore volume of the fracture based on the initial T2 measurements; (4) conducting an in-situ local slice selective T2 NMR test on the slice of the plug to generate in-situ T2 measurements and corresponding measures of a volume of fluid expelled from the plug; (5) determining an in-situ fracture pore volume for the fracture based on the in-situ T2 measurements; and (6) comparing the volume of water to a difference between the initial and the in-situ fracture pore volumes to confirm the accuracy of the in-situ pore volume.Type: GrantFiled: February 26, 2020Date of Patent: September 7, 2021Assignee: Saudi Arabian Oil CompanyInventors: Marwah Mufid AlSinan, Hyung Tae Kwak
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Patent number: 11085984Abstract: During operation, a system may apply an external magnetic field and an RF pulse sequence to a sample. Then, the system may measure at least a component of a magnetization associated with the sample, such as MR signals of one or more types of nuclei in the sample. Moreover, the system may calculate at least a predicted component of the magnetization for voxels associated with the sample based on the measured component of the magnetization, a forward model, the external magnetic field and the RF pulse sequence. Next, the system may solve an inverse problem by iteratively modifying the parameters associated with the voxels in the forward model until a difference between the predicted component of the magnetization and the measured component of the magnetization is less than a predefined value. Note that the calculations may be performed concurrently with the measurements and may not involve performing a Fourier transform.Type: GrantFiled: January 7, 2019Date of Patent: August 10, 2021Assignee: Q Bio, Inc.Inventors: Jeffrey H. Kaditz, Athanasios Polymeridis, Jorge Villena
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Patent number: 11073464Abstract: A method for characterizing wettability of a porous medium is described. A core sample of the porous medium is secured in a core holder, which includes a first end and a second end. A model of the core sample and a pore volume of the core sample are obtained. A wetting phase is displaced from the core sample by supplying a non-wetting phase at one end of the core holder. The non-wetting phase is displaced from the core sample by supplying the wetting phase at one end of the core holder. A saturation profile of the core sample is determined based on cross-sectional images of the core sample. A wettability index value is calculated at least based on a comparison of the saturation profile and the model of the core sample.Type: GrantFiled: August 8, 2019Date of Patent: July 27, 2021Assignee: Saudi Arabian Oil CompanyInventors: Jun Gao, Ahmad Mubarak Al-Harbi, Hyung Tae Kwak
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Patent number: 11067518Abstract: A whole measurement process includes a plurality of step combinations. Each of the step combinations is composed of a solution-state measurement step and a solid-state measurement step. In the solution-state measurement step, solution-state NMR measurement is performed such that magnetization that is to be used in the solid-state measurement step remains. In the solid-state measurement step, solid-state NMR measurement is performed by using the magnetization that remains. No waiting time for recovering magnetization is provided between the solution-state measurement step and the solid-state measurement step. The solid-state measurement step may be performed earlier, and the solution-state measurement step may be performed later. Alternatively, the two steps may be performed simultaneously.Type: GrantFiled: December 11, 2017Date of Patent: July 20, 2021Assignees: RIKEN, JEOL Ltd.Inventor: Yusuke Nishiyama
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Patent number: 11061091Abstract: A method for the magnetic resonance examination of a measurement object is described, in which a measurement sequence is used in which the magnetic resonance response to the transmitted signal during transmission is measured. It is provided that a correction signal corresponding to the transmitted signal be generated and be used for correction of the response signal. To this end, the correction signal is modulated by a phase value and an amplitude value. The phase value and the amplitude value are automatically and iteratively customized for optimum correction of the response signal by an optimization method using a respective present state value of the measurement signal. Further, a radio-frequency unit (1) is described that can be used to carry out the method according to the invention.Type: GrantFiled: December 1, 2017Date of Patent: July 13, 2021Assignee: Albert-Ludwigs-Universität FreiburgInventors: Ali Caglar Ozen, Michael Bock
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Patent number: 11054493Abstract: In a method for generating an MR image of an object, k-space of the MR image is separated into blades. In each blade, parallel k-space lines are provided which are separated in a phase encoding direction (PED). Each blade has a different rotation angle around a common center relative to the remaining blades. A spatial extent of the object is determined. For the blades, the extent of the object in the corresponding PED is determined. A blade specific extent of a field of view (FOV) in the PED is determined for each of the blades based on the corresponding extent of the object in the PED. The extent of the FOV in the PED differs for at least one of the blades from the extent of the remaining blades, and sampling the k-space with the blades with the determined blade specific FOV as determined for each of the blades.Type: GrantFiled: November 7, 2019Date of Patent: July 6, 2021Assignee: Siemens Healthcare GmbHInventors: Mario Zeller, Dominik Paul
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Patent number: 11047945Abstract: Generation of a preview image using magnetic resonance signals is provided. A method for the generation of a preview image using magnetic resonance signals includes acquiring a first part and a second part of magnetic resonance signals. During the acquisition of the first part of the magnetic resonance signals, a first k-space is regularly sampled, while, during the acquisition of the second part of the magnetic resonance signals, a second k-space is sampled in a pseudorandomized manner. The first part of the magnetic resonance signals is used to generate a preview image. The second part or the second part and a subset of the first part of the magnetic resonance signals are stored for the generation of a second image.Type: GrantFiled: March 12, 2016Date of Patent: June 29, 2021Assignee: SIEMENS AKTIENGESELLSCHAFTInventor: Mathias Nittka
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Patent number: 11047936Abstract: In some aspects, a resonator device includes a dielectric substrate, a ground plane on a first side of the substrate, and conductors on a second, opposite side of the substrate. The conductors include first and second resonators and two baluns. Each balun includes a feed, a first branch and a second branch. The feed is connected to the first and second branches, and the first and second branches are capacitively coupled to the respective first and second resonators. The first branch includes a delay line configured to produce a phase shift relative to the second branch. The resonator device includes a sample region configured to support a magnetic resonance sample between the first and second resonators.Type: GrantFiled: July 21, 2016Date of Patent: June 29, 2021Assignee: Quantum Valley Investment Fund LPInventors: Hamidreza Mohebbi, Grum Teklemariam, David Cory
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Patent number: 11041925Abstract: A processor controls an MRI system with pulse sequence commands to acquire magnetic resonance data according to a magnetic resonance fingerprinting protocol during multiple pulse repetitions. The pulse sequence commands control the magnetic resonance imaging system to cause gradient induced spin rephasing at least twice during each of the multiple pulse repetitions, and to acquire at least two magnetic resonance signals during each of the multiple pulse repetitions. Each of the at least two magnetic resonance signals is measured during a separate one of the gradient induced spin rephasing. The magnetic resonance data includes the at least two magnetic resonance signals acquired during each of the multiple pulse repetitions. The processor further at least partially calculates a B0-off-resonance map using the magnetic resonance data, and generates at least one magnetic resonance parametric map by comparing the magnetic resonance data with a magnetic resonance fingerprinting dictionary.Type: GrantFiled: September 22, 2017Date of Patent: June 22, 2021Assignee: Koninklijke Philips N.V.Inventors: Jan Jakob Meineke, Thomas Erik Amthor, Peter Koken, Karsten Sommer
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Patent number: 11041924Abstract: A method for determining a spoiler gradient of a magnetic resonance (MR) system is provided. At least one shim parameter that defines a shim magnetic field for compensating for B0 magnetic field inhomogeneities in a measurement volume of the MR system is received. As a function of the at least one shim parameter, at least one spoiler parameter that defines a spoiler gradient for canceling out a transverse magnetization is determined. The spoiler gradient is applied together with the shim magnetic field in a measurement of the MR system.Type: GrantFiled: May 29, 2020Date of Patent: June 22, 2021Assignee: Siemens Healthcare GmbHInventor: Uwe Böttcher
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Patent number: 11035769Abstract: Nuclear magnetic resonance (NMR) gas isotherm techniques to evaluate wettability of porous media, such as hydrocarbon reservoir rock, can include constructing a NMR gas isotherm curve for a porous media sample gas adsorption under various pressures. A hydrophobic or hydrophilic nature of the porous media sample can be determined using the NMR gas isotherm curves. A wettability of the porous media sample can be determined based on the NMR gas isotherm curve. The wettability can be determined for porous media samples with different pore sizes. In the case of reservoir rock samples, the determined wettability can be used, among other things, to model the hydrocarbon reservoir that includes such rock samples, to simulate fluid flow through such reservoirs, or to model enhanced hydrocarbon recovery from such reservoirs.Type: GrantFiled: January 13, 2020Date of Patent: June 15, 2021Assignee: Saudi Arabian Oil CompanyInventors: Hyung Tae Kwak, Ahmad Mubarak Al-Harbi
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Patent number: 11022667Abstract: The disclosure relates to a system and method for generating or using a synthesizing filter in image reconstruction. The method may include: acquiring a calibration data set including a plurality of data points, determining a first calibration region in the calibration data set, the first calibration region including a matrix having a plurality of data points, the plurality of data points includes a first data point at the center of the first calibration region, constructing a first relationship between the first data point and the data points in the first calibration region, and generating a synthesizing filter based on the first relationship. The first data point is at the center of the first calibration region. The method may be implemented on at least one machine each of which has at least one processor and storage. The generated synthesizing filter may be stored in the storage in electronic form as a data file.Type: GrantFiled: June 29, 2017Date of Patent: June 1, 2021Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.Inventors: Yu Ding, Renjie He
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Patent number: 10996155Abstract: Nuclear magnetic resonance (NMR) gas isotherm techniques to evaluate wettability of porous media, such as hydrocarbon reservoir rock, can include constructing a NMR gas isotherm curve for a porous media sample gas adsorption under various pressures. A hydrophobic or hydrophilic nature of the porous media sample can be determined using the NMR gas isotherm curves. A wettability of the porous media sample can be determined based on the NMR gas isotherm curve. The wettability can be determined for porous media samples with different pore sizes. In the case of reservoir rock samples, the determined wettability can be used, among other things, to model the hydrocarbon reservoir that includes such rock samples, to simulate fluid flow through such reservoirs, or to model enhanced hydrocarbon recovery from such reservoirs.Type: GrantFiled: August 1, 2019Date of Patent: May 4, 2021Assignee: Saudi Arabian Oil CompanyInventors: Hyung Tae Kwak, Ahmad Mubarak Al-Harbi
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Patent number: 10996154Abstract: Nuclear magnetic resonance (NMR) gas isotherm techniques to evaluate wettability of porous media, such as hydrocarbon reservoir rock, can include constructing a NMR gas isotherm curve for a porous media sample gas adsorption under various pressures. A hydrophobic or hydrophilic nature of the porous media sample can be determined using the NMR gas isotherm curves. A wettability of the porous media sample can be determined based on the NMR gas isotherm curve. The wettability can be determined for porous media samples with different pore sizes. In the case of reservoir rock samples, the determined wettability can be used, among other things, to model the hydrocarbon reservoir that includes such rock samples, to simulate fluid flow through such reservoirs, or to model enhanced hydrocarbon recovery from such reservoirs.Type: GrantFiled: August 1, 2019Date of Patent: May 4, 2021Assignee: Saudi Arabian Oil CompanyInventors: Hyung Tae Kwak, Ahmad Mubarak Al-Harbi
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Patent number: 10976394Abstract: A method and apparatus produce angiographic magnetic resonance (MR) images that are based on unsaturated spins flowing into an imaging volume, wherein vessels of the person under examination that do not run parallel to a coordinate axis of the MR apparatus are imaged. The nuclear magnetization in at least a first imaging slice of the person under examination is excited in order to generate MR signals in at least one imaging slice, and MR signals from the at least one first imaging slice are received in order to produce angiographic MR images of the vessels. The at least imaging slice has a curved slice profile.Type: GrantFiled: June 19, 2019Date of Patent: April 13, 2021Assignee: Siemens Healthcare GmbHInventor: Joachim Graessner
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Patent number: 10976274Abstract: The present disclosure describes methods and systems, including computer-implemented methods, computer program products, and computer systems, for measuring wettability of a rock sample. One method includes: at each temperature of a plurality of temperatures, obtaining a first Nuclear Magnetic Resonance (NMR) surface relaxation time for a rock sample having a saturation level; determining a first temperature sensitivity based on the first NMR surface relaxation times and corresponding temperatures; at each temperature of the plurality of temperatures, obtaining a second NMR surface relaxation time for the rock sample that is saturated with oil; determining a second temperature sensitivity based on the second NMR surface relaxation times and corresponding temperature; and determining a wettability of the rock sample based on the first temperature sensitivity and the second temperature sensitivity.Type: GrantFiled: September 18, 2019Date of Patent: April 13, 2021Assignee: Saudi Arabian Oil CompanyInventors: Hyung Tae Kwak, Ahmad Mubarak Al-Harbi