公开(公告)号：US20240353510A1

公开(公告)日：2024-10-24

申请号：US18640637

申请日：2024-04-19

Applicant: GE Precision Healthcare LLC

Inventor： Yanan Chen ,  Haiyuan Sun ,  Gang Ma ,  Tao He ,  Sun Lu

IPC: G01R33/36 ,  G01R33/385 ,  H01F27/28 ,  H02M1/00 ,  H02M7/48

CPC classification number: G01R33/3614 ,  G01R33/3852 ,  H01F27/2804 ,  H02M1/0058 ,  H02M7/4815

Abstract: A resonant power circuit, a magnetic resonance imaging system, and a transformer are provided. The resonant power circuit is disposed within a scan room of a magnetic resonance imaging system, and is used for supplying power to a switch device in a radio-frequency amplifier of the magnetic resonance imaging system. The resonant power circuit includes: an inverter circuit, a resonant transformer circuit, and a rectifier circuit. The ratio of a resonant frequency is greater than 1 and less than a first threshold, a series resonant frequency being determined according to a resonant capacitor and a resonant inductor.

公开(公告)号：US20240125877A1

公开(公告)日：2024-04-18

申请号：US18393213

申请日：2023-12-21

Applicant: Hyperfine Operations, Inc.

Inventor： Michael Twieg

IPC: G01R33/385 ,  G01R33/44 ,  G01R33/563

CPC classification number: G01R33/3852 ,  G01R33/445 ,  G01R33/56341

Abstract: Systems and methods for operating a magnetic resonance imaging (MRI) system are provided. The MRI system includes a magnetics system and a power system configured to provide power to at least some of the magnetics system. The power system includes an energy storage device and a power supply configured to receive mains electricity. The MRI system also includes at least one controller configured to control the MRI system to operate in accordance with a pulse sequence at least in part by generating, by using power supplied by the power supply and supplemental power supplied by the energy storage device, at least one gradient field using at least one gradient coil of the magnetics system.

公开(公告)号：US11916474B2

公开(公告)日：2024-02-27

申请号：US17268773

申请日：2019-08-14

Applicant: PRODRIVE TECHNOLOGIES INNOVATION SERVICES B.V.

Inventor： Jordi Everts

IPC: H02M1/42 ,  B60L53/12 ,  B60L53/20 ,  G01R33/385 ,  H02J7/02 ,  H02M7/219

CPC classification number: H02M1/4233 ,  B60L53/12 ,  B60L53/20 ,  G01R33/3852 ,  H02J7/02 ,  H02M7/219 ,  H02J2207/20

Abstract: Electrical converters of the present disclosure feature a boost circuit that is fully integrated with a three phase bridge rectifier to allow for obtaining a pulsed voltage at the rectifier output. Actively switchable semiconductor switches of the boost circuit are controlled by pulse width modulation (PWM) control signals to obtain the pulsed voltage. PWM of this pulsed voltage allows control of two out of three currents at the three input terminals of the rectifier, i.e., the currents at the phase inputs having the highest and the lowest voltage levels of the three phase input voltage.

公开(公告)号：US20230349991A1

公开(公告)日：2023-11-02

申请号：US18134211

申请日：2023-04-13

Applicant: Siemens Healthcare GmbH

Inventor： Dominik Paul ,  Mario Zeller ,  Flavio Carinci

IPC: G01R33/385 ,  A61B5/055 ,  G01R33/48

CPC classification number: G01R33/3852 ,  A61B5/055 ,  G01R33/4818

Abstract: Permitted gradient intensities are established to prevent an overloading of a gradient unit of a magnetic resonance system during a recording, with the magnetic resonance system, of scan data from an examination object situated in a scan volume of said magnetic resonance system.

公开(公告)号：US11650276B2

公开(公告)日：2023-05-16

申请号：US17528276

申请日：2021-11-17

Applicant: Siemens Healthcare GmbH

Inventor： Dominik Paul ,  Mario Zeller ,  Flavio Carinci

IPC: G01R33/54 ,  G01R33/385 ,  G01R33/58

CPC classification number: G01R33/543 ,  G01R33/3852 ,  G01R33/58

Abstract: Techniques are described for acquiring MR data comprising first MR data and second MR data of an examination object using an MR control sequence and a magnetic resonance device comprising an amplifier unit and an analog-to-digital converter (ADC).

公开(公告)号：US20190101607A1

公开(公告)日：2019-04-04

申请号：US16207971

申请日：2018-12-03

Applicant: Hyperfine Research, Inc.

Inventor： Jonathan M. Rothberg ,  Jeremy Christopher Jordan ,  Michael Stephen Poole ,  Laura Sacolick ,  Todd Rearick ,  Gregory L. Charvat

IPC: G01R33/56 ,  G01R33/36 ,  G01R33/28 ,  G01R33/385 ,  G01R33/58 ,  G01R33/48 ,  H01F7/02 ,  H01F7/06 ,  G01R33/383 ,  G01R33/54 ,  G01R33/38 ,  G01R33/44 ,  G01R33/381 ,  G01R33/3875 ,  G01R33/34 ,  G01R33/565 ,  G01R33/422

CPC classification number: G01R33/5608 ,  G01R33/28 ,  G01R33/34007 ,  G01R33/36 ,  G01R33/3614 ,  G01R33/38 ,  G01R33/3802 ,  G01R33/3804 ,  G01R33/3806 ,  G01R33/381 ,  G01R33/383 ,  G01R33/385 ,  G01R33/3852 ,  G01R33/3854 ,  G01R33/3856 ,  G01R33/3858 ,  G01R33/3875 ,  G01R33/422 ,  G01R33/445 ,  G01R33/48 ,  G01R33/543 ,  G01R33/546 ,  G01R33/56 ,  G01R33/56518 ,  G01R33/58 ,  H01F7/02 ,  H01F7/06

Abstract: In some aspects, a method of operating a magnetic resonance imaging system comprising a B0 magnet and at least one thermal management component configured to transfer heat away from the B0 magnet during operation is provided. The method comprises providing operating power to the B0 magnet, monitoring a temperature of the B0 magnet to determine a current temperature of the B0 magnet, and operating the at least one thermal management component at less than operational capacity in response to an occurrence of at least one event.

公开(公告)号：US20180238981A1

公开(公告)日：2018-08-23

申请号：US15956554

申请日：2018-04-18

Applicant: Hyperfine Research, Inc.

Inventor： Michael Stephen Poole ,  Cedric Hugon ,  Christopher Thomas McNulty

IPC: G01R33/385 ,  G01R33/44 ,  G01R33/383

CPC classification number: G01R33/3852 ,  A61B5/0555 ,  A61B6/4405 ,  A61B50/13 ,  A61B90/00 ,  A61B2560/0431 ,  A61G13/104 ,  G01R33/34092 ,  G01R33/3642 ,  G01R33/3657 ,  G01R33/38 ,  G01R33/3802 ,  G01R33/3806 ,  G01R33/383 ,  G01R33/385 ,  G01R33/3854 ,  G01R33/3873 ,  G01R33/389 ,  G01R33/4215 ,  G01R33/422 ,  G01R33/445 ,  G01R33/48 ,  G01R33/5608

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：US20180238978A1

公开(公告)日：2018-08-23

申请号：US15956584

申请日：2018-04-18

Applicant: Hyperfine Research, Inc.

Inventor： Christopher Thomas McNulty ,  Michael Stephen Poole

IPC: G01R33/38 ,  G01R33/383 ,  G01R33/44 ,  G01R33/385

CPC classification number: G01R33/3802 ,  G01R33/3607 ,  G01R33/3614 ,  G01R33/365 ,  G01R33/3806 ,  G01R33/381 ,  G01R33/383 ,  G01R33/385 ,  G01R33/3852 ,  G01R33/422 ,  G01R33/445 ,  G01R33/5659

Abstract: According to some aspects, a magnetic resonance imaging system comprising a B0 magnet configured to produce a B0 magnetic field for the magnetic resonance imaging system, the B0 magnet comprising at least one first B0 magnet to produce a magnetic field to contribute to the B0 magnetic field for the magnetic resonance imaging system, at least one second B0 magnet to produce a magnetic field to contribute to the B0 magnetic field for the magnetic resonance imaging system, wherein the at least one first B0 magnet and the at least one second B0 magnet are arranged relative to one another so that an imaging region is provided there between, a surface configured to support a patient anatomy within the imaging region, and a positioning member coupled to the B0 magnet and configured to allow the B0 magnet to be tilted to position the planar surface at a corresponding incline.

公开(公告)号：US20180210047A1

公开(公告)日：2018-07-26

申请号：US15879203

申请日：2018-01-24

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 ,  G01R33/44 ,  G01R33/383

CPC classification number: G01R33/3852 ,  A61B5/0555 ,  A61B6/4405 ,  A61B50/13 ,  A61B90/00 ,  A61B2560/0431 ,  A61G13/104 ,  G01R33/34092 ,  G01R33/3642 ,  G01R33/3657 ,  G01R33/38 ,  G01R33/3802 ,  G01R33/3806 ,  G01R33/383 ,  G01R33/385 ,  G01R33/3854 ,  G01R33/3873 ,  G01R33/389 ,  G01R33/4215 ,  G01R33/422 ,  G01R33/445 ,  G01R33/48 ,  G01R33/5608

Abstract: According to some aspects, a low power magnetic resonance imaging system is provided. The 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, a plurality of gradient coils configured to, when operated, generate magnetic fields to provide spatial encoding of emitted magnetic resonance signals, and at least one radio frequency coil configured to, when operated, transmit radio frequency signals to the field of view of the magnetic resonance imaging system and to respond to magnetic resonance signals emitted from the field of view. The magnetic resonance imaging system further comprises 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, wherein the power system operates the low-field magnetic resonance imaging system using an average of less than 1.6 kilowatts during image acquisition. According to some aspects, the magnetic resonance imaging system is a low-field magnetic resonance imaging system comprising 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：US20180164390A1

公开(公告)日：2018-06-14

申请号：US15879317

申请日：2018-01-24

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: G01R33/422 ,  G01R33/36 ,  G01R33/38

CPC classification number: G01R33/3852 ,  A61B5/0555 ,  A61B6/4405 ,  A61B50/13 ,  A61B90/00 ,  A61B2560/0431 ,  A61G13/104 ,  G01R33/34092 ,  G01R33/3642 ,  G01R33/3657 ,  G01R33/38 ,  G01R33/3802 ,  G01R33/3806 ,  G01R33/383 ,  G01R33/385 ,  G01R33/3854 ,  G01R33/3873 ,  G01R33/389 ,  G01R33/4215 ,  G01R33/422 ,  G01R33/445 ,  G01R33/48 ,  G01R33/5608

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.