Hyperfine Research, Inc.

Hyperfine Operations, Inc.

Hyperfine, Inc.

Hyperfire Research, Inc.

Cedric Hugon

Michael Stephen Poole

Christopher Thomas McNulty

Hadrien A Dyvorne

Laura Sacolick

Jonathan Marc Rothberg

Todd Rearick

Jeremy Christopher Jordan

William Julian Mileski

Alan B Katze, Jr

Tyler S Ralston

Rafael O'Halloran

An apparatus for providing a Bmagnetic field for a magnetic resonance imaging system. The apparatus includes at least one first Bmagnet configured to produce a first magnetic field to contribute to the Bmagnetic field for the magnetic resonance imaging system, the at least one first Bmagnet comprising a first plurality of permanent magnet rings including at least two rings with respective different heights.

B0 magnet methods and apparatus for a magnetic resonance imaging system

Techniques for compensating for presence of eddy currents during the operation of a magnetic resonance imaging (MRI) system in accordance with a pulse sequence, the pulse sequence comprising a gradient waveform associated with a target gradient field. The techniques include: compensating for presence of eddy currents during operation of the MRI system at least in part by correcting the gradient waveform using a nonlinear function of a characteristic of the gradient waveform to obtain a corrected gradient waveform; and operating the MRI system in accordance with the corrected gradient waveform to generate the target gradient field.

Eddy current mitigation systems and methods

A method of producing a permanent magnet shim configured to improve a profile of a Bmagnetic field produced by a Bmagnet is provided. The method comprises determining deviation of the Bmagnetic field from a desired Bmagnetic field, determining a magnetic pattern that, when applied to magnetic material, produces a corrective magnetic field that corrects for at least some of the determined deviation, and applying the magnetic pattern to the magnetic material to produce the permanent magnet shim. According to some aspects, a permanent magnet shim for improving a profile of a Bmagnetic field produced by a Bmagnet is provided. The permanent magnet shim comprises magnetic material having a predetermined magnetic pattern applied thereto that produces a corrective magnetic field to improve the profile of the Bmagnetic field.

Methods and apparatus for magnetic field shimming

An apparatus for providing a Bmagnetic field for a magnetic resonance imaging system. The apparatus includes at least one permanent Bmagnet to contribute a magnetic field to the Bo magnetic field for the MRI system and a ferromagnetic frame configured to capture and direct at least some of the magnetic field generated by the Bmagnet. The ferromagnetic frame includes a first post having a first end and a second end, a first multi-pronged member coupled to the first end, and a second multi-pronged member coupled to the second end, wherein the first and second multi-pronged members support the at least one permanent Bmagnet.

Ferromagnetic frame for magnetic resonance imaging

An apparatus for controlling at least one gradient coil of a magnetic resonance imaging (MRI) system. The apparatus may include at least one computer hardware processor; and at least one computer-readable storage medium storing processor executable instructions that, when executed by the at least one computer hardware processor, cause the at least one computer hardware processor to perform a method. The method may include receiving information specifying at least one target pulse sequence; determining a corrected pulse sequence to control the at least one gradient coil based on the at least one target pulse sequence and a hysteresis model of induced magnetization in the MRI system caused by operation of the at least one gradient coil; and controlling, using the corrected gradient pulse sequence, the at least one gradient coil to generate one or more gradient pulses for imaging a patient.

Correcting for hysteresis in magnetic resonance imaging

According to some aspects, a portable magnetic resonance imaging system is provided, comprising a Bmagnet configured to produce a Bmagnetic 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.

Electromagnetic shielding for magnetic resonance imaging methods and apparatus

Bmagnet methods and apparatus for a magnetic resonance imaging system

An assembly for providing a Bmagnetic field for a magnetic resonance imaging (MRI) system, the assembly comprising: a plurality of rods extending along a common longitudinal direction and positioned to form a bore extending along the common longitudinal direction, the plurality of rods including a first rod, the first rod comprising: ferromagnetic segments, each having a net magnetization in a plane that is substantially perpendicular to the common longitudinal direction; and non-ferromagnetic segments.

Permanent magnet assembly for magnetic resonance imaging with non-ferromagnetic frame

An apparatus for providing a Bmagnetic field for a magnetic resonance imaging system. The apparatus includes at least one permanent Bmagnet to contribute a magnetic field to the Bmagnetic field for the MRI system and a ferromagnetic frame configured to capture and direct at least some of the magnetic field generated by the Bmagnet. The ferromagnetic frame includes a first post having a first end and a second end, a first multi-pronged member coupled to the first end, and a second multi-pronged member coupled to the second end, wherein the first and second multi-pronged members support the at least one permanent Bmagnet.

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 Bmagnet configured to produce a Bfield 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.

Portable magnetic resonance imaging methods and apparatus

An apparatus for providing a Bmagnetic field for a magnetic resonance imaging system. The apparatus includes at least one permanent Bmagnet to contribute a magnetic field to the Bmagnetic field for the MRI system and a ferromagnetic frame configured to capture and direct at least some of the magnetic field generated by the Bmagnet. The ferromagnetic frame includes a first plate configured to support the at least one permanent Bmagnet and a first post attached to the first plate using a first connection assembly, wherein the first connection assembly includes a first connector that connects the first post and the first plate and a second connector attached to the first connector.

An assembly for providing a Bmagnetic field for a magnetic resonance imaging (MRI) system, the assembly comprising: a plurality of ferromagnetic segments positioned to form: a bore extending along a common longitudinal direction, and a first gap, on a first side of the bore, to accommodate at least one first gradient coil, wherein at least some of the plurality of ferromagnetic segments are positioned on one side of the first gap and at least some others of the plurality of ferromagnetic segments are positioned on another side of the first gap.

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Guilford, CT, United States of America

Cedric Hugon