PORTABLE MAGNETIC RESONANCE IMAGING METHODS AND APPARATUS

    公开(公告)号:US20190018096A1

    公开(公告)日:2019-01-17

    申请号:US16123989

    申请日:2018-09-06

    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.

    MAGNETIC RESONANCE IMAGING MAGNET ASSEMBLY SYSTEMS AND METHODS

    公开(公告)号:US20210170595A1

    公开(公告)日:2021-06-10

    申请号:US17115132

    申请日:2020-12-08

    Inventor: Tie Hu Cedric Hugon

    Abstract: Systems and methods for automated assembly of a B0 magnet assembly for use in a point-of-care MRI system are provided herein. A gripper capable of gripping a permanent magnet with a high clamping force is provided for positioning the permanent magnet in the B0 magnet assembly in accordance with a permanent magnet layout. A robot having multiple degrees of freedom is provided for positioning the gripper. Components of the system described herein have been developed to withstand the effects of strong magnetic forces generated by high-strength magnetic fields surrounding the B0 magnet assembly.

    CORRECTING FOR HYSTERESIS IN MAGNETIC RESONANCE IMAGING

    公开(公告)号:US20200209334A1

    公开(公告)日:2020-07-02

    申请号:US16684976

    申请日:2019-11-15

    Abstract: 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.

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