公开(公告)号：US20250028069A1

公开(公告)日：2025-01-23

申请号：US18223965

申请日：2023-07-19

Applicant: Halliburton Energy Services, Inc.

Inventor： Jie YANG

IPC: G01V3/32 ,  G01R33/389 ,  G01R33/44 ,  G01V3/38

Abstract: Described herein are systems and techniques for improving accuracies of determinations made using a nuclear magnetic resonance (NMR) sensing device when the NRM sensing device collects data in a wellbore. NMR sensing devices include a magnet that provides a magnetic field that aligns the spins of protons in substances near the NMR sensing device. The magnetic field strength provided by this magnet affects the sensitivity of the NMR sensing device and affects frequencies that the NMR sensing device effectively uses when the NMR sensing device operates. Furthermore, the field strength of magnets used in an NMR sensing device varies with temperature. Since temperatures within a wellbore vary significantly and since these temperatures affect how an NMR sensing device operates, systems and techniques of the present disclosure collect calibration data in a calibration chamber such that data sensed by the NMR sensing device can be interpreted more accurately when temperatures change.

公开(公告)号：US12072402B2

公开(公告)日：2024-08-27

申请号：US17664799

申请日：2022-05-24

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Chunlei Liu ,  Victor Han

IPC: G01R33/389 ,  A61B5/055 ,  G01R33/3815 ,  G01R33/385

CPC classification number: G01R33/389 ,  A61B5/055 ,  G01R33/3815 ,  G01R33/3852

Abstract: Systems and methods are provided for multiphotonic magnetic resonance imaging. The system uses one or more (B1,z) RF coils or oscillating gradients oriented along the z-axis to provide multiphoton resonances. The B1,z coils can be implemented as planar coils or solenoids. With the additional coils, standard slice-selective pulse sequences have all standard excitations replaced with multiphoton excitations that excite extra resonances. In vivo imaging using multiphoton excitation has signal to noise ratios comparable to single-photon excitations when similar pulse sequences are used. Since excitation is not bound to the Larmor frequency, new RF pulse sequences can be designed with imaging methods patterned after single-photon excitation concepts.

公开(公告)号：US11105873B2

公开(公告)日：2021-08-31

申请号：US16742311

申请日：2020-01-14

Applicant: Hyperfine, Inc.

Inventor： Michael Stephen Poole ,  Cedric Hugon

IPC: G01R33/38 ,  G01R33/385 ,  G01R33/383 ,  G01R33/44 ,  A61B50/13 ,  G01R33/389 ,  G01R33/421 ,  G01R33/56 ,  A61B6/00 ,  A61G13/10 ,  G01R33/34 ,  A61B5/055 ,  G01R33/48 ,  A61B90/00 ,  G01R33/3873 ,  G01R33/36 ,  G01R33/422

Abstract: According to some aspects, a low-field magnetic resonance imaging system is provided. The low-field magnetic resonance imaging system comprises a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing magnetic resonance imaging, the magnetics system comprising, a B0 magnet configured to produce a B0 field for the magnetic resonance imaging system at a low-field strength of less than 0.2 Tesla (T), a plurality of gradient coils configured to, when operated, generate magnetic fields to provide spatial encoding of magnetic resonance signals, and at least one radio frequency coil configured to, when operated, transmit radio frequency signals to a field of view of the magnetic resonance imaging system and to respond to magnetic resonance signals emitted from the field of view, a power system comprising one or more power components configured to provide power to the magnetics system to operate the magnetic resonance imaging system to perform image acquisition, and a power connection configured to connect to a single-phase outlet to receive mains electricity and deliver the mains electricity to the power system to provide power needed to operate the magnetic resonance imaging system. According to some aspects, the power system operates the low-field magnetic resonance imaging system using an average of less than 1.6 kilowatts during image acquisition.

公开(公告)号：US20210165060A1

公开(公告)日：2021-06-03

申请号：US17145962

申请日：2021-01-11

Applicant: Hyperfine Research, Inc.

Inventor： Michael Stephen Poole ,  Cedric Hugon ,  Hadrien A. Dyvorne ,  Laura Sacolick ,  William J. Mileski ,  Jeremy Christopher Jordan ,  Alan B. Katze, JR. ,  Jonathan M. Rothberg ,  Todd Rearick ,  Christopher Thomas McNulty

IPC: G01R33/385 ,  G01R33/383 ,  G01R33/44 ,  A61B50/13 ,  A61B5/055 ,  G01R33/389 ,  G01R33/421 ,  G01R33/56 ,  G01R33/38 ,  A61B6/00 ,  A61G13/10 ,  G01R33/34 ,  G01R33/48 ,  A61B90/00

Abstract: According to some aspects, a low-field magnetic resonance imaging system is provided. The low-field magnetic resonance imaging system comprises a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing magnetic resonance imaging, the magnetics system comprising, a B0 magnet configured to produce a B0 field for the magnetic resonance imaging system at a low-field strength of less than 0.2 Tesla (T), a plurality of gradient coils configured to, when operated, generate magnetic fields to provide spatial encoding of magnetic resonance signals, and at least one radio frequency coil configured to, when operated, transmit radio frequency signals to a field of view of the magnetic resonance imaging system and to respond to magnetic resonance signals emitted from the field of view, a power system comprising one or more power components configured to provide power to the magnetics system to operate the magnetic resonance imaging system to perform image acquisition, and a power connection configured to connect to a single-phase outlet to receive mains electricity and deliver the mains electricity to the power system to provide power needed to operate the magnetic resonance imaging system. According to some aspects, the power system operates the low-field magnetic resonance imaging system using an average of less than 1.6 kilowatts during image acquisition.

公开(公告)号：US10921404B2

公开(公告)日：2021-02-16

申请号：US16840149

申请日：2020-04-03

Applicant: Hyperfine Research, Inc.

Inventor： Michael Stephen Poole ,  Cedric Hugon ,  Hadrien A. Dyvorne ,  Laura Sacolick ,  William J. Mileski ,  Jeremy Christopher Jordan ,  Alan B. Katze, Jr. ,  Jonathan M. Rothberg ,  Todd Rearick ,  Christopher Thomas McNulty

IPC: G01R33/38 ,  G01R33/385 ,  G01R33/383 ,  G01R33/44 ,  A61B50/13 ,  G01R33/389 ,  G01R33/421 ,  G01R33/56 ,  A61B5/055 ,  A61B6/00 ,  A61G13/10 ,  G01R33/34 ,  G01R33/48 ,  A61B90/00 ,  G01R33/3873 ,  G01R33/36 ,  G01R33/422

Abstract: According to some aspects, a low-field magnetic resonance imaging system is provided. The low-field magnetic resonance imaging system comprises a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing magnetic resonance imaging, the magnetics system comprising, a B0 magnet, a plurality of gradient coils, and at least one radio frequency coil, a power system comprising one or more power components configured to provide power to the magnetics system to operate the magnetic resonance imaging system to perform image acquisition, and a power connection configured to connect to a single-phase outlet to receive mains electricity and deliver the mains electricity to the power system to provide power needed to operate the magnetic resonance imaging system.

公开(公告)号：US10698050B2

公开(公告)日：2020-06-30

申请号：US15880482

申请日：2018-01-25

Applicant: Hyperfine Research, Inc.

Inventor： Michael Stephen Poole ,  Cedric Hugon ,  Hadrien A. Dyvorne ,  Laura Sacolick ,  William J. Mileski ,  Jeremy Christopher Jordan ,  Alan B. Katze, Jr. ,  Jonathan M. Rothberg ,  Todd Rearick ,  Christopher Thomas McNulty

IPC: G01R33/383 ,  G01R33/385 ,  G01R33/44 ,  A61B50/13 ,  G01R33/389 ,  G01R33/421 ,  G01R33/56 ,  G01R33/38 ,  A61B5/055 ,  A61B6/00 ,  A61G13/10 ,  G01R33/34 ,  G01R33/48 ,  A61B90/00 ,  G01R33/3873 ,  G01R33/36 ,  G01R33/422

Abstract: According to some aspects, a portable magnetic resonance imaging system is provided, comprising a B0 magnet configured to produce a B0 magnetic field for an imaging region of the magnetic resonance imaging system, a noise reduction system configured to detect and suppress at least some electromagnetic noise in an operating environment of the portable magnetic resonance imaging system, and electromagnetic shielding provided to attenuate at least some of the electromagnetic noise in the operating environment of the portable magnetic resonance imaging system, the electromagnetic shielding arranged to shield a fraction of the imaging region of the portable magnetic resonance imaging system. According to some aspects, the electromagnetic shield comprises at least one electromagnetic shield structure adjustably coupled to the housing to provide electromagnetic shielding for the imaging region in an amount that can be varied. According to some aspects, substantially no shielding of the imaging region of the portable magnetic resonance imaging system is provided.

公开(公告)号：US10444310B2

公开(公告)日：2019-10-15

申请号：US16123989

申请日：2018-09-06

Applicant: Hyperfine Research, Inc.

Inventor： Michael Stephen Poole ,  Cedric Hugon ,  Hadrien A. Dyvorne ,  Laura Sacolick ,  William J. Mileski ,  Jeremy Christopher Jordan ,  Alan B. Katze, Jr. ,  Jonathan M. Rothberg ,  Todd Rearick ,  Christopher Thomas McNulty

IPC: G01R33/385 ,  G01R33/383 ,  G01R33/44 ,  G01R33/389 ,  G01R33/421 ,  G01R33/56 ,  G01R33/38 ,  A61B5/055 ,  A61B6/00 ,  A61G13/10 ,  G01R33/34 ,  G01R33/48 ,  A61B90/00 ,  A61B50/13 ,  G01R33/36 ,  G01R33/422 ,  G01R33/3873

Abstract: According to some aspects, a portable magnetic resonance imaging system is provided, comprising a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing magnetic resonance imaging. The magnetics system comprises a permanent B0 magnet configured to produce a B0 field for the magnetic resonance imaging system, and a plurality of gradient coils configured to, when operated, generate magnetic fields to provide spatial encoding of emitted magnetic resonance signals, a power system comprising one or more power components configured to provide power to the magnetics system to operate the magnetic resonance imaging system to perform image acquisition, and a base that supports the magnetics system and houses the power system, the base comprising at least one conveyance mechanism allowing the portable magnetic resonance imaging system to be transported to different locations. According to some aspects, the base has a maximum horizontal dimension of less than or equal to approximately 50 inches. According to some aspects, the portable magnetic resonance imaging system weighs less than 1,500 pounds. According to some aspects, the portable magnetic resonance imaging system has a 5-Gauss line that has a maximum dimension of less than or equal to five feet.

公开(公告)号：US10353030B2

公开(公告)日：2019-07-16

申请号：US16130788

申请日：2018-09-13

Applicant: Hyperfine Research, Inc.

Inventor： Michael Stephen Poole ,  Cedric Hugon

IPC: G01R33/38 ,  G01R33/385 ,  G01R33/383 ,  G01R33/44 ,  G01R33/389 ,  G01R33/421 ,  G01R33/56 ,  A61B5/055 ,  A61B6/00 ,  A61G13/10 ,  G01R33/34 ,  G01R33/48 ,  A61B90/00 ,  A61B50/13 ,  G01R33/36 ,  G01R33/422 ,  G01R33/3873

Abstract: An apparatus for providing a B0 magnetic field for a magnetic resonance imaging system, the apparatus comprising: at least one permanent B0 magnet to produce a magnetic field to contribute to the B0 magnetic field for the magnetic resonance imaging system, the at least one permanent B0 magnet comprising a plurality of permanent magnet rings, each of the plurality of permanent magnet rings comprising a plurality of permanent magnet segments having a respective height in a direction normal to the respective permanent magnet ring, wherein the height of at least one first permanent magnet segment is different than the height of at least one second permanent magnet segment, and wherein the at least one first permanent magnet segment and the at least one second permanent magnet are in different ones of the plurality of permanent magnet rings.

公开(公告)号：US20190154777A1

公开(公告)日：2019-05-23

申请号：US16305946

申请日：2017-06-05

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： GERARDUS BERNARDUS JOZEF MULDER ,  CORNELIS LEONARDUS GERARDUS HAM

IPC: G01R33/389 ,  H01F6/00 ,  G01R33/3815 ,  G01R33/421

Abstract: A superconducting magnet includes superconducting magnet coils (C1, C2, C3, C4, C5, C6, S1, S2) disposed inside a magnet cryostat (12). The superconducting magnet coils generate a static (B0) magnetic field when an electric current flows in the superconducting magnet coils. A superconducting B0 compensation circuit (30, 60, 70) is also disposed inside the magnet cryostat, and is coupled with the superconducting magnet coils to passively reduce temporal variations in the B0 magnetic field generated by the superconducting magnet coils. An electric current sensor (40) is also disposed inside the magnet cryostat and is connected to measure electric current flowing in the superconducting B0 compensation circuit. An active B0 compensation component (50) is operatively connected with the electric current sensor to receive the measurement of electric current flowing in the superconducting B0 compensation circuit and to provide active B0 magnetic field compensation based on the measured electric current.

公开(公告)号：US10267885B2

公开(公告)日：2019-04-23

申请号：US14882793

申请日：2015-10-14

Applicant: Siemens Aktiengesellschaft

Inventor： David Grodzki

IPC: G01R33/565 ,  G01R33/00 ,  G01R33/025 ,  G01R33/387 ,  G01R33/389

Abstract: To enable improved magnetic resonance imaging in the vicinity of an interference object that produces a magnetic interference field in an examination region, in a method and apparatus for magnetic resonance imaging of the examination region magnetic resonance raw data are acquired from the examination region by execution of a magnetic resonance sequence having multiple repetition intervals and refocusing of spins in the examination region at the end of each repetition interval repetition intervals. During at least part of the duration of the acquisition of the magnetic resonance raw data, a magnetic compensation gradient is activated that is opposed to the magnetic interference field.