公开(公告)号：US20200309878A1

公开(公告)日：2020-10-01

申请号：US16366848

申请日：2019-03-27

申请人： Siemens Healthcare GmbH ,  Yale University

发明人： Stefan Popescu ,  Markus Vester ,  Peter Speier ,  Edgar Müller ,  Robert Todd Constable ,  Gigi Galiana

IPC分类号： G01R33/38 ,  G01R33/383 ,  G01R33/381 ,  G01R33/30

摘要： A magnetic resonance scanner has a base, a C-arm mounted on said base, the C-arm having an inner surface curved in a C-shape, the C-shape defining a plane, a magnet mounted on said inner curved surface of said C-arm, the magnet generating a basic magnetic field for magnetic resonance imaging, and a drive mechanism mechanically connected to the magnet. The drive mechanism rotates the magnet around an axis that is orthogonal to said plane so as to selectively position said magnet in at least two magnet positions that are respectively above and beneath a patient, who is situated in the C-arm along or parallel to the axis.

公开(公告)号：US20200309877A1

公开(公告)日：2020-10-01

申请号：US16366830

申请日：2019-03-27

申请人： Siemens Healthcare GmbH ,  Yale University

发明人： Markus Vester ,  Peter Speier ,  Stefan Popescu ,  Edgar Mueller ,  Robert Todd Constable ,  Gigi Galiana

IPC分类号： G01R33/38 ,  G01R33/383

摘要： A magnet assembly for magnetic resonance imaging is used to generate the basic magnetic field with a strength needed to produce the steady state or equilibrium position of nuclei or nuclear spins in magnetic resonance imaging. This magnet, or a part thereof, is vibrated or tilted or otherwise periodically moved so as to change its position and thereby generate a time-varying gradient field, which is used to enter the acquired magnetic resonance signals as raw data into k-space.

公开(公告)号：US10823793B2

公开(公告)日：2020-11-03

申请号：US16366848

申请日：2019-03-27

申请人： Siemens Healthcare GmbH ,  Yale University

发明人： Stefan Popescu ,  Markus Vester ,  Peter Speier ,  Edgar Müller ,  Robert Todd Constable ,  Gigi Galiana

IPC分类号： G01R33/38 ,  G01R33/381 ,  G01R33/383

摘要： A magnetic resonance scanner has a base, a C-arm mounted on the base, the C-arm having an inner surface curved in a C-shape, the C-shape defining a plane, a magnet mounted on the inner curved surface of the C-arm, the magnet generating a basic magnetic field for magnetic resonance imaging, and a drive mechanism mechanically connected to the magnet. The drive mechanism rotates the magnet around an axis that is orthogonal to the plane so as to selectively position the magnet in at least two magnet positions that are respectively above and beneath a patient, who is situated in the C-arm along or parallel to the axis.

公开(公告)号：US10935615B2

公开(公告)日：2021-03-02

申请号：US16366830

申请日：2019-03-27

申请人： Siemens Healthcare GmbH ,  Yale University

发明人： Markus Vester ,  Peter Speier ,  Stefan Popescu ,  Edgar Mueller ,  Robert Todd Constable ,  Gigi Galiana

IPC分类号： G01V3/00 ,  G01R33/38 ,  G01R33/383

摘要： A magnet assembly for magnetic resonance imaging is used to generate the basic magnetic field with a strength needed to produce the steady state or equilibrium position of nuclei or nuclear spins in magnetic resonance imaging. This magnet, or a part thereof, is vibrated or tilted or otherwise periodically moved so as to change its position and thereby generate a time-varying gradient field, which is used to enter the acquired magnetic resonance signals as raw data into k-space.

公开(公告)号：US10353039B2

公开(公告)日：2019-07-16

申请号：US15037867

申请日：2014-11-20

申请人： Yale University

发明人： Robert Todd Constable ,  Gigi Galiana

IPC分类号： G01R33/48 ,  G01R33/561

摘要： Efficient encoding of signals in an MRI image is achieved through a combination of parallel receiver coils, and nonlinear gradient encoding that varies dynamically in such a manner as to impose a unique phase/frequency time varying signal on each pixel in the field of view. Any redundancies are designed such that they are easily resolved by the receiver coil sensitivity profiles. Since each voxel has an essentially identifiable complex temporal signal, spatial localization is easily achieved with only a single echo acquisition.