公开(公告)号：US20220291312A1

公开(公告)日：2022-09-15

申请号：US17707375

申请日：2022-03-29

申请人： Aspect Imaging Ltd.

发明人： Uri RAPOPORT ,  Yair GOLDFARB ,  Yoram COHEN

IPC分类号： G01R33/383 ,  H01F7/02 ,  G01R33/421 ,  G01R33/3873 ,  G01R33/565

摘要： A magnetic field device, with a first magnet, a first ferromagnetic element positioned adjacent to the first magnet, a second magnet, a second ferromagnetic element positioned adjacent to the second magnet and relative to the first ferromagnetic element to create a gap between the first ferromagnetic element and the second ferromagnetic element, and a third magnet positioned between the first ferromagnetic element and the second ferromagnetic element and within the gap.

公开(公告)号：US20210210268A1

公开(公告)日：2021-07-08

申请号：US17103505

申请日：2020-11-24

申请人： Aspect Imaging Ltd.

发明人： Uri RAPOPORT ,  Yair GOLDFARB ,  Yoram COHEN

IPC分类号： H01F7/02 ,  G01R33/383 ,  G01R33/3873

摘要： A magnetic field device, with a first magnet, a first ferromagnetic element positioned adjacent to the first magnet, a second magnet, a second ferromagnetic element positioned adjacent to the second magnet and relative to the first ferromagnetic element to create a gap between the first ferromagnetic element and the second ferromagnetic element, and a third magnet positioned between the first ferromagnetic element and the second ferromagnetic element and within the gap.

公开(公告)号：US20200011947A1

公开(公告)日：2020-01-09

申请号：US16558615

申请日：2019-09-03

申请人： Aspect Imaging Ltd.

发明人： Uri RAPOPORT ,  Yoram COHEN ,  Yair GOLDFARB

IPC分类号： G01R33/421

摘要： A magnetic resonance imaging (MRI) system is provided. The MRI system can include a magnetic field device to generate a magnetic field within a measurement volume and to generate a magnetic fringe field external to the measurement volume. The MRI system can include a ferromagnetic housing to envelop the magnetic field device. The housing can have a first portion and a second portion, where thickness of the first portion is different from thickness of the second portion. The MRI system can include a plate having a plate opening and positioned external to the housing at a predetermined distance from the housing. In some embodiments, the magnetic fringe field generated by the MRI system can be asymmetric with respect to a center of the measurement volume.

公开(公告)号：US20210151232A1

公开(公告)日：2021-05-20

申请号：US17103534

申请日：2020-11-24

申请人： Aspect Imaging Ltd.

发明人： Uri RAPOPORT ,  Yoram COHEN ,  Yair GOLDFARB

IPC分类号： H01F7/02

摘要： Generally, a system for generating a magnetic field having a desired magnetic field strength and/or a desired magnetic field direction is provided. The system can include a plurality of magnetic segments and/or a plurality of ferromagnetic segments. Each magnetic segment can be positioned adjacent to at least one of the plurality of magnetic segments. Each ferromagnetic segment can be positioned adjacent to at least one of the plurality of magnetic segments. In various embodiments, a size, shape, positioning and/or number of magnetic segments and/or ferromagnetic segments in the system, as well as a magnetization direction of the magnetic segments can be predetermined based on, for example, predetermined parameters of the system (e.g., a desired magnetic field strength, direction and/or uniformity of the magnetic field, a desired elimination of a magnetic fringe field and/or total weight of the system) and/or based on a desired application of the system (e.g., performing a magnetic resonance imaging of at least a portion of a patient and/or performing a magnetic resonance spectroscopy of a sample).

公开(公告)号：US20190170840A1

公开(公告)日：2019-06-06

申请号：US16324218

申请日：2017-03-26

申请人： Aspect Imaging Ltd.

发明人： Uri RAPOPORT ,  Yair GOLDFARB ,  Yoram COHEN

IPC分类号： G01R33/383 ,  H01F7/02

摘要： A magnetic field device, with a first magnet, a first ferromagnetic element positioned adjacent to the first magnet, a second magnet, a second ferromagnetic element positioned adjacent to the second magnet and relative to the first ferromagnetic element to create a gap between the first ferromagnetic element and the second ferromagnetic element, and a third magnet positioned between the first ferromagnetic element and the second ferromagnetic element and within the gap.

公开(公告)号：US20180313921A1

公开(公告)日：2018-11-01

申请号：US15581297

申请日：2017-04-28

申请人： Aspect Imaging Ltd.

发明人： Uri RAPOPORT ,  Yoram COHEN ,  Yair GOLDFARB

IPC分类号： G01R33/38

CPC分类号： G01R33/421 ,  G01R33/288 ,  G01R33/383

摘要： A magnetic resonance imaging (MRI) system is provided. The MRI system can include a magnetic field device to generate a magnetic field within a measurement volume and to generate a magnetic fringe field external to the measurement volume. The MRI system can include a ferromagnetic housing to envelop the magnetic field device. The housing can have a first portion and a second portion, where thickness of the first portion is different from thickness of the second portion. The MRI system can include a plate having a plate opening and positioned external to the housing at a predetermined distance from the housing. In some embodiments, the magnetic fringe field generated by the MRI system can be asymmetric with respect to a center of the measurement volume.