公开(公告)号：EP0714521B1

公开(公告)日：2001-12-19

申请号：EP95917046.5

申请日：1995-04-12

申请人： NEW YORK UNIVERSITY

发明人： ABELE, Manlio, G. ,  RUSINEK, Henry ,  JENSEN, Jens

IPC分类号： G01V3/14 ,  H01F7/02

CPC分类号： G01R33/3873 ,  G01R33/3806 ,  G01R33/383

公开(公告)号：EP0653096A1

公开(公告)日：1995-05-17

申请号：EP93918577.0

申请日：1993-07-27

申请人： NEW YORK UNIVERSITY

发明人： ABELE, Manlio, G. ,  RUSINEK, Henry

IPC分类号： A61B5 ,  G01R33 ,  H01F7

CPC分类号： G01R33/383 ,  H01F7/0273 ,  H01F7/0278

摘要： A high field strength permanent magnet has a plurality of layers, with at least two of the layers being formed of materials of different remanence. The remanence of the material of each layer is no greater than that of the layers thereunder, and is preferably less than the remanence of all underlying layers. The inner layer may be formed of a magnetic structure in which all or part of a basic yoke has been replaced by a shunt of active material. Such a shunt may alternatively be employed in a single layer magnetic structure.

公开(公告)号：EP0941542B1

公开(公告)日：2007-08-08

申请号：EP97950699.5

申请日：1997-11-24

申请人： NEW YORK UNIVERSITY

发明人： ABELE, Manlio, G. ,  RUSINEK, Henry ,  JENSEN, Jens

IPC分类号： H01F7/02 ,  G01R33/383

CPC分类号： G01R33/3808 ,  G01R33/383 ,  H01F7/0278

摘要： A magnetic structure generating a uniform magnetic field comprising at least one pair (12, 14) of magnetic wedges of identical shape arranged symmetrically about a first axis and abutting one another along a common edge. Each magnetic wedge has a first side and a second side which terminate at the common edge. The first wedge of each pair is positioned to define a first angle between the first side and the first axis and a second angle between the second side and the first axis, and is uniformly magnetized in a direction relative to a second axis (perpendicular to the first axis) which is a function of the sum of the first and second angles. The second wedge of each pair is magnetized such that the absolute values of components of the magnetization along the first and second axes are equal to components of the magnetization of the first wedge along the first and second axes, and one of the magnetization components of the second wedge is opposite to the magnetization component of the first wedge.

公开(公告)号：EP0610493B1

公开(公告)日：1998-12-02

申请号：EP93920189.3

申请日：1993-08-18

申请人： NEW YORK UNIVERSITY

发明人： ABELE, Manilo, G. ,  RUSINEK, Henry

IPC分类号： G01R33/38 ,  H01F7/02

CPC分类号： H01F7/0278 ,  G01R33/383

摘要： A magnetic structure defining a cavity (20) includes a first member (30) of high permeability material having a flat surface defining a first wall of the cavity, and a member of permanent magnet material (10) spaced from the flat surface and producing a uniform field in the cavity. The permanent magnetic material member may have two or more layers, with the layers outward of the cavity being of a material having a remanence that is no greater than the adjacent inner layers.

公开(公告)号：EP1831817A2

公开(公告)日：2007-09-12

申请号：EP05815010.3

申请日：2005-10-31

申请人： NEW YORK UNIVERSITY

发明人： MIKHEEV, Artem ,  RUSINEK, Henry

IPC分类号： G06K9/00

CPC分类号： G06K9/4638 ,  A61B5/055 ,  A61B6/03 ,  G06K2209/05 ,  G06T7/12 ,  G06T2207/10081 ,  G06T2207/10088 ,  G06T2207/20036 ,  G06T2207/20104 ,  G06T2207/30016 ,  G06T2207/30032

摘要： A logic arrangement, system and method for segmentation using magnetic resonance imaging ('MRI') are provided. For example, as an end product, an image associated with at least one portion of an anatomical structure is generated. In particular, first data associated with the at least one portion of the anatomical structure is recived. Second data can be associated with at least one edge of at least one of the at least one portion is obtained based on the first data (1 14). The image can be generated based on the first data and the second data. In addition or as an alternative, it is also possible to generate the image using connected voxel components (1 12). Such components are created by processing information associated with an erosion of surface voxels of an image.

摘要翻译： 提供了使用磁共振成像（“MRI”）进行分割的逻辑布置，系统和方法。 例如，作为最终产品，生成与解剖结构的至少一部分相关联的图像。 特别地，接收与解剖结构的至少一个部分相关联的第一数据。 第二数据可以与基于第一数据获得至少一个部分中的至少一个的至少一个边缘相关联。 可以基于第一数据和第二数据生成图像。 另外或作为替代，也可以使用连接的体元部件来生成图像。 通过处理与图像的表面体素的侵蚀相关联的信息来创建这些组件。

公开(公告)号：EP0815471B1

公开(公告)日：2004-05-12

申请号：EP96911280.4

申请日：1996-03-12

申请人： NEW YORK UNIVERSITY

发明人： ABELE, Manlio, G. ,  RUSINEK, Henry ,  JENSEN, Jens

IPC分类号： G01V3/00 ,  G03G21/00 ,  H01F7/02 ,  G01R33/383

CPC分类号： G01R33/3873 ,  G01R33/3806 ,  G01R33/383

公开(公告)号：EP0815471A1

公开(公告)日：1998-01-07

申请号：EP96911280.0

申请日：1996-03-12

申请人： NEW YORK UNIVERSITY

发明人： ABELE, Manlio, G. ,  RUSINEK, Henry ,  JENSEN, Jens

IPC分类号： G01R33 ,  A61B5 ,  G01V3 ,  G03G21 ,  H01F7

CPC分类号： G01R33/3873 ,  G01R33/3806 ,  G01R33/383

摘要： A hybrid permanent magnet structure (71) for providing a uniform magnetic field within a region of interest while allowing access via open ends by a patient for NMR scanning and by a surgeon to the patient via a large opening (56) at the top. The magnet structure comprises nested inner and outer magnetic structures separated by ferromagnetic material and surrounded by a ferromagnetic yoke (70). The inner magnetic sections comprise end blocks of triangular cross section (64, 66), and the outer magnetic sections comprise end blocks of trapezoidal cross section (65, 67, 68). Field distortion compensating means is provided by a primary filter structure to the ferromagnetic material and by magnetic insertions or a secondary filter structure.

公开(公告)号：EP0941542A1

公开(公告)日：1999-09-15

申请号：EP97950699.0

申请日：1997-11-24

申请人： NEW YORK UNIVERSITY

发明人： ABELE, Manlio, G. ,  RUSINEK, Henry ,  JENSEN, Jens

IPC分类号： A61B5 ,  G01R33 ,  H01F7

CPC分类号： G01R33/3808 ,  G01R33/383 ,  H01F7/0278

摘要： A magnetic structure generating a uniform magnetic field comprising at least one pair (12, 14) of magnetic wedges of identical shape arranged symmetrically about a first axis and abutting one another along a common edge. Each magnetic wedge has a first side and a second side which terminate at the common edge. The first wedge of each pair is positioned to define a first angle between the first side and the first axis and a second angle between the second side and the first axis, and is uniformly magnetized in a direction relative to a second axis (perpendicular to the first axis) which is a function of the sum of the first and second angles. The second wedge of each pair is magnetized such that the absolute values of components of the magnetization along the first and second axes are equal to components of the magnetization of the first wedge along the first and second axes, and one of the magnetization components of the second wedge is opposite to the magnetization component of the first wedge.

公开(公告)号：EP0653096B1

公开(公告)日：1998-06-10

申请号：EP93918577.3

申请日：1993-07-27

申请人： NEW YORK UNIVERSITY

发明人： ABELE, Manlio, G. ,  RUSINEK, Henry

IPC分类号： G01R33/38 ,  H01F7/02

CPC分类号： G01R33/383 ,  H01F7/0273 ,  H01F7/0278

公开(公告)号：EP0714521A1

公开(公告)日：1996-06-05

申请号：EP95917046.0

申请日：1995-04-12

申请人： NEW YORK UNIVERSITY

发明人： ABELE, Manlio, G. ,  RUSINEK, Henry ,  JENSEN, Jens

IPC分类号： G01V3 ,  A61B5 ,  G01R33 ,  H01F7

CPC分类号： G01R33/3873 ,  G01R33/3806 ,  G01R33/383

摘要： A technique is provided for improving the homogeneity of the magnetic field within a cavity disposed inside a magnetic stucture having an opening to permit convenient access to an imaging region. The technique is based upon the step of inserting layers of magnetized material between plates (20, 24) of high magnetic permeability material. The layers are inserted at the boundary of the cavity. The technique includes (1) computing the surface charges on the plates as used to derived the distribution of the magnetostatic potential, (2) analyzing the uniformity of the magnetic field within the imaging region as effected by the opening in the magnetic structure by expanding the magnetostatic potential in a spatial harmonic series, and (3) determining the geometry and the composition of the inserted layers based on the successive elimination of increasing orders of spatial harmonics in the potential expansion within the imaging region. This invention includes the structure resulting from the technique of the invention.