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1. 发明授权

US6163240A Magnetic apparatus for MRI 有权
标题翻译： MRI磁共振仪
公开(公告)号：US6163240A
公开(公告)日：2000-12-19
申请号：US161336
申请日：1998-09-25
申请人： Yuval Zuk , Ehud Katznelson , Yoav Katz , Haim Rotem
发明人： Yuval Zuk , Ehud Katznelson , Yoav Katz , Haim Rotem
IPC分类号： A61B5/055 , G01R33/34 , G01R33/38 , G01R33/383 , G01R33/385 , H01F1/00 , H01F7/02 , H01F5/00 , G01V3/00
CPC分类号： G01R33/3806 , G01R33/34061 , G01R33/341 , G01R33/3678 , G01R33/383 , G01R33/385 , G01R33/3858 , G01R33/422 , H01F7/0278
摘要： Magnetic apparatus for MRI/MRT probes and methods for construction thereof are disclosed. One embodiment includes a pair of opposed magnet assemblies defining an open region therebetween, a transmitting RF coil having at least a portion thereof disposed within the open region, at least one receiving RF coil disposed within the open region and X,Y and Z gradient coils. At least one of the X,Y and Z gradient coils is disposed outside of the open region. Another embodiment of the apparatus includes a single magnet assembly having a first surface and a second surface opposing the first surface, a transmitting RF coil having at least a portion thereof opposing the first surface, at least one receiving RF coil and X,Y and Z gradient coils. At least one of the X,Y and Z gradient coils opposes the second surface. In another embodiment the magnet assembly generates a permanent z-gradient magnetic field and therefore includes only X and Y gradient coils, at least one of which opposes the second surface. The apparatuses may also include one or more shim coils.
摘要翻译：公开了用于MRI / MRT探针的磁性装置及其构造方法。一个实施例包括在其间限定开放区域的一对相对的磁体组件，其中至少一部分设置在开放区域内的发射RF线圈，设置在开放区域内的至少一个接收RF线圈和X，Y和Z梯度线圈。 X，Y和Z梯度线圈中的至少一个设置在开放区域的外部。该装置的另一实施例包括具有与第一表面相对的第一表面和第二表面的单个磁体组件，具有至少一部分与第一表面相对的发射RF线圈，至少一个接收RF线圈和X，Y和Z 梯度线圈 X，Y和Z梯度线圈中的至少一个与第二表面相对。在另一个实施例中，磁体组件产生永久的z-梯度磁场，因此仅包括X和Y梯度线圈，其中至少一个与第二表面相对。该装置还可以包括一个或多个垫片线圈。

2. 发明授权

US06411187B1 Adjustable hybrid magnetic apparatus 有权
标题翻译：可调混合磁力装置
公开(公告)号：US06411187B1
公开(公告)日：2002-06-25
申请号：US09721767
申请日：2000-11-27
申请人： Haim Rotem , Ehud Katznelson
发明人： Haim Rotem , Ehud Katznelson
IPC分类号： H01F300
CPC分类号： G01R33/3806 , G01R33/383 , H01F7/0278
摘要： Adjustable hybrid magnetic apparatus for use in medical and other applications includes an electromagnet flux generator for generating a first magnetic field in an imaging volume, and permanent magnet assemblies for generating a second magnetic field superimposed on the first magnetic field for providing a substantially homogenous magnetic field having improved magnitude within the imaging volume. The permanent magnet assemblies may include a plurality of annular or disc like concentric magnets spaced-apart along their axis of symmetry. The electromagnet flux generator may include two electromagnet assemblies. The electromagnet assemblies and the permanent magnet assemblies may be static assemblies or may be movable and/or tiltable and/or movable and tiltable, for fine tuning of the magnetic field within the imaging volume. The hybrid magnetic apparatus may include a high magnetic permeability yoke for increasing the intensity of the magnetic field in the imaging volume of the hybrid magnetic apparatus.
摘要翻译：用于医疗和其他应用的可调节混合磁性装置包括用于在成像体积中产生第一磁场的电磁体通量发生器和用于产生叠加在第一磁场上的第二磁场的永磁体组件，用于提供基本均匀的磁场在成像体积内具有改善的幅度。永磁体组件可以包括沿其对称轴线间隔开的多个环形或盘状同心磁体。电磁通量发生器可以包括两个电磁体组件。电磁体组件和永磁体组件可以是静态组件，或者可以是可移动的和/或可倾斜的和/或可移动和可倾斜的，用于微调成像体积内的磁场。混合磁性装置可以包括用于增加混合磁性装置的成像体积中的磁场强度的高磁导率磁轭。

3. 发明授权

US09159479B2 Magnetic enclosure and method 有权
标题翻译：磁性外壳和方法
公开(公告)号：US09159479B2
公开(公告)日：2015-10-13
申请号：US14174582
申请日：2014-02-06
申请人： Haim Rotem
发明人： Haim Rotem
IPC分类号： H01F7/02 , G01R33/383 , G01R33/38
CPC分类号： H01F7/02 , G01R33/3806 , G01R33/383 , H01F7/0278
摘要： A magnetic enclosure providing a uniform magnetic field in a test chamber and comprising substantially identical first north magnetic structure and second south magnetic structures that are disposed in geometric mirroring symmetry opposite to each other and separated by an air gap forming the test chamber. Each magnetic structure includes a cap-like permanent magnet assembly covering a convex ferromagnetic pole piece, a ferromagnetic cap-like shield covering the magnet assembly, and a ferromagnetic ring. The ring is in contact with and intermediate the shield of the first and of the second magnetic structure, and has at least one aperture allowing access to the test chamber.
摘要翻译：磁性外壳，其在测试室中提供均匀的磁场，并且包括基本上相同的第一北磁结构和第二南磁结构，所述第一北磁结构和第二南磁结构以彼此相对的几何镜像对称的方式设置并由形成测试室的空气间隙分开。每个磁性结构包括覆盖凸铁磁极片的帽状永磁体组件，覆盖磁体组件的铁磁帽状屏蔽件和铁磁环。环与第一和第二磁性结构的屏蔽接触并且位于中间，并且具有允许进入测试室的至少一个孔。

4. 发明授权

US06275037B1 Removing discontinuties in MRI-space data 失效
标题翻译：消除MRI空间数据中断
公开(公告)号：US06275037B1
公开(公告)日：2001-08-14
申请号：US09152198
申请日：1998-09-14
申请人： Paul R. Harvey , Haim Rotem
发明人： Paul R. Harvey , Haim Rotem
IPC分类号： G01R3320
CPC分类号： G01R33/561 , G01R33/5619
摘要： A method is provided for removing discontinuities between the data of a first and second data set acquired in a k-space for a same MRI image of a subject, where the data for each of the data sets is acquired at k-coordinate points in adjacent regions of the k-space, using different MRI imaging techniques or operating conditions.
摘要翻译：提供了一种用于消除在对象的相同MRI图像中在k空间中获取的第一和第二数据集的数据之间的不连续性的方法，其中在相邻的k坐标点处获取每个数据集的数据区域的k空间，使用不同的MRI成像技术或操作条件。

5. 发明授权

US06600401B2 Magnetic apparatus for MRI 有权
公开(公告)号：US06600401B2
公开(公告)日：2003-07-29
申请号：US09738777
申请日：2000-12-18
申请人： Yuval Zuk , Yoav Katz , Ehud Katznelson , Haim Rotem
发明人： Yuval Zuk , Yoav Katz , Ehud Katznelson , Haim Rotem
IPC分类号： G01R3320
CPC分类号： G01R33/3806 , G01R33/34061 , G01R33/341 , G01R33/3678 , G01R33/383 , G01R33/385 , G01R33/3858 , G01R33/422 , H01F7/0278
摘要： Magnetic apparatus for MRI/MRT probes and methods for construction thereof are disclosed. One embodiment includes a pair of opposed magnet assemblies defining an open region therebetween, a transmitting RF coil having at least a portion thereof disposed within the open region, at least one receiving RF coil disposed within the open region and X, Y and Z gradient coils. At least one of the X, Y and Z gradient coils is disposed outside of the open region. Another embodiment of the apparatus includes a single magnet assembly having a first surface and a second surface opposing the first surface, a transmitting RF coil having at least a portion thereof opposing the first surface, at least one receiving RF coil and X, Y and Z gradient coils. At least one of the X, Y and Z gradient coils opposes the second surface. In another embodiment the magnet assembly generates a permanent z-gradient magnetic field and therefore includes only X and Y gradient coils, at least one of which opposes the second surface. The apparatuses may also include one or more shim coils.

6. 发明授权

US5331280A Evolving image 失效
标题翻译：演进形象
公开(公告)号：US5331280A
公开(公告)日：1994-07-19
申请号：US991941
申请日：1992-12-17
申请人： Yuval Zur , Haim Rotem , Dan Rosenfeld
发明人： Yuval Zur , Haim Rotem , Dan Rosenfeld
IPC分类号： A61B5/055 , G01R33/32 , G01R33/54 , G01R33/565 , G01R33/20
CPC分类号： G01R33/56545
摘要： A magnetic resonance imaging system that:applies gradient pulses in a sequence that elicits large amounts of data early in a scan to provide an evolving image; and reduces the Gibbs artifacts to increase the utility of the evolving images.
摘要翻译：一种磁共振成像系统，其以在扫描中早期引出大量数据的序列应用梯度脉冲以提供演进图像; 并减少吉布斯伪像以增加演进图像的效用。

7. 发明授权

US6157278A Hybrid magnetic apparatus for use in medical applications 有权
标题翻译：用于医疗应用的混合磁性装置
公开(公告)号：US6157278A
公开(公告)日：2000-12-05
申请号：US274671
申请日：1999-03-24
申请人： Ehud Katznelson , Yuval Zuk , Haim Rotem
发明人： Ehud Katznelson , Yuval Zuk , Haim Rotem
IPC分类号： A61B5/055 , G01R33/38 , G01R33/383 , H01F7/02 , H01F3/00 , G01R33/20 , G01V3/00 , H01F7/22
CPC分类号： G01R33/3806 , G01R33/383 , H01F7/0278
摘要： Permanent magnet assemblies and hybrid magnetic apparatus are disclosed for use in medical applications, particularly permanent magnet assemblies for use in Magnetic Resonance Imaging (MRI) and/or Magnetic Resonance Therapy (MRT) to produce a volume of substantially uniform magnetic field in a restricted part of the patient's body in a region either adjacent to the surface of one permanent magnet assembly or between a set of a first and second permanent magnet assemblies, leaving open access to the patient's body. The assemblies consist of a plurality of annular concentric magnets spaced-apart along their axis of symmetry. A method for constructing such annular permanent magnetic assemblies is disclosed, using equi-angular segments permanently magnetized. The hybrid magnetic apparatus includes an electromagnet flux generator for generating a first magnetic field in the volume, and permanent magnet assemblies for generating a second magnetic field superimposed on the first magnetic field for providing a substantially homogenous magnetic field having improved magnitude within the volume.
摘要翻译：公开了用于医疗应用的永久磁体组件和混合磁性装置，特别是用于磁共振成像（MRI）和/或磁共振治疗（MRT）的永磁体组件，以在限制部分中产生基本上均匀的磁场体积在与一个永磁体组件的表面相邻的区域中或在一组第一和第二永久磁铁组件之间的区域中，使患者的身体离开开放进入患者身体。组件由沿其对称轴间隔开的多个环形同心磁体组成。公开了一种用于构造这种环形永磁组件的方法，其使用永久磁化的等角段。混合磁性装置包括用于产生体积中的第一磁场的电磁体通量发生器和用于产生叠加在第一磁场上的第二磁场的永磁体组件，用于提供在体积内具有改善的幅度的基本均匀的磁场。

8. 发明授权

US4871967A Spectral component separation in mr imaging 失效
标题翻译：光谱成分分离
公开(公告)号：US4871967A
公开(公告)日：1989-10-03
申请号：US125533
申请日：1987-11-25
申请人： Haim Rotem , Yair Shimoni
发明人： Haim Rotem , Yair Shimoni
IPC分类号： G01R33/485 , G01R33/54 , G01R33/565
CPC分类号： G01R33/4828 , G01R33/485 , G01R33/56563
摘要： A method and system for using magnetic resonance imaging (MRI) to acquire separate data contributions from first and second spectral components by causing a 90 degree phase difference between the data of said components in a first of at least two echoes and using the two echoes to determine the approximate .DELTA..phi. delay due to inhomogeneity, determining linear phase delay .beta. and using .DELTA..phi. and .beta. in the calculation of the separated data contributions of each of the spectral components.
摘要翻译：一种用于使用磁共振成像（MRI）从第一和第二光谱分量获得单独的数据贡献的方法和系统，通过在至少两个回波中的第一个中产生所述分量的数据之间的90度相位差，并且使用两个回波确定由于不均匀性导致的近似DELTA phi延迟，确定线性相位延迟β并且在计算每个频谱分量的分离数据贡献时使用DELTA phi和β。

9. 发明授权

US4797615A Determining and correcting for phase jumps 失效
标题翻译：确定和纠正相位跳变
公开(公告)号：US4797615A
公开(公告)日：1989-01-10
申请号：US103012
申请日：1987-09-30
申请人： Haim Rotem , Yair Shimoni , Shmuel Goldberg
发明人： Haim Rotem , Yair Shimoni , Shmuel Goldberg
IPC分类号： G01R33/565 , G01R33/20
CPC分类号： G01R33/565 , G01R33/56527 , G01R33/56563
摘要： A continuous phase magnetic field map is provided by dividing the field map of elements into regions; determining discontinuities in the regions and adding a constant modulo 2.pi. to the phase values of each element of the region which results in a minimum difference between adjacent elements of the region. Then similarly joining the continuous regions to form continuous sections and the continuous sections to form continuous zones until substantially continuous phase magnetic field maps are obtained.
摘要翻译：通过将元素的场图划分为区域来提供连续相位磁场图; 确定区域中的不连续性，并且对该区域的每个元素的相位值加上恒定的模2π，该相位值导致区域的相邻元素之间的最小差异。然后类似地连接连续区域以形成连续区段和连续区段以形成连续区域，直到获得基本连续的相位磁场图。

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