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    Method for making a permanent magnet particularly for MRI scanners and a permanent magnet, particularly for MRI scanners made by said method
    53.
    发明授权
    Method for making a permanent magnet particularly for MRI scanners and a permanent magnet, particularly for MRI scanners made by said method 有权
    对于制造永磁体，特别是用于为Kerspintomographen Kerspintomographen通过该方法制备的方法，及永久磁铁，特别是

    公开(公告)号：EP2309284B1

    公开(公告)日：2013-12-25

    申请号：EP10186455.1

    申请日：2010-10-04

    申请人： Esaote S.p.A.

    发明人： Besio, Stefano ,  Pittaluga, Stefano ,  Punzo, Vincenzo ,  Trequattrini, Alessandro

    IPC分类号： G01R33/383 ,  H01F7/02

    CPC分类号： G01R33/383 ,  Y10T29/49764

    摘要： Method for making magnets for use in MRI scanners, which magnets are three-dimensional and have a tubular wall made of magnetized material, the tubular wall being composed of individual elements made of magnetized material. The invention provides the following steps: determining the modulus and direction of the magnetization of elements necessary for generating a predetermined magnetic field in the cavity inside said tubular wall in a theoretical two-dimensional magnet model, extruding the two-dimensional model to a three-dimensional model and at least partially compensating aberrations, distortions or inhomogeneites of the magnetic field generated in the three-dimensional model by modifying the magnetization orientation in the individual elements and in the plane of the two-dimensional model such to minimize differences between the magnetic field in the two-dimensional model and the magnetic field in the three-dimensional model.

    摘要翻译： 用于制备磁体用于MRI扫描仪，其中磁铁是三维的，并且具有由磁化材料制成的管状壁中的方法，所述管状壁部分由制成磁化材料的单独元件。 本发明提供了以下步骤：确定挖掘模量和必要的元素用于在理论二维磁模型在所述管状壁的内部腔体产生预定的磁场，挤出所述二维模型于三轮的磁化的方向 维模型和至少通过修改单个元件的磁化方向和平面中的二维模型的寻求最小化的磁场之间的差异部分地补偿像差，失真或​​在所述三维模型所产生的磁场的inhomogeneites 在三维模型的二维模型和磁场。

    Multi-echo magnetic resonance imaging
    54.
    发明公开
    Multi-echo magnetic resonance imaging 审中-公开
    多回声Magnetresonanzbildgebung

    公开(公告)号：EP2631664A1

    公开(公告)日：2013-08-28

    申请号：EP13156081.5

    申请日：2013-02-21

    申请人： Esaote S.p.A.

    发明人： Serra, Andrea

    IPC分类号： G01R33/565 ,  G01R33/48 ,  G01R33/561

    CPC分类号： G01R33/56 ,  G01R33/482 ,  G01R33/5617 ,  G01R33/56554

    摘要： MRI method wherein a first set and a second set of magnetic resonance signals are acquired, using multi-echo sequences, such that echoes with the same echo index are assigned to different phase-encoding gradients, said first set and said at least one second set being entered into at least two corresponding k-space matrices, and the at least two k-space matrices being combined into a single k-space matrix from which an image is generated, wherein each k-space matrix is incompletely filled such that, for the same phase encoding gradients, one matrix contains the higher-intensity received signals, and at least another matrix contains no signal, and said single k-space matrix is generated by taking a partial average.

    摘要翻译： MRI方法，其中使用多回波序列获取第一组和第二组磁共振信号，使得具有相同回波指数的回波被分配给不同的相位编码梯度，所述第一组和所述至少一个第二组 被输入到至少两个对应的k空间矩阵中，并且所述至少两个k空间矩阵被组合成从其生成图像的单个k空间矩阵，其中每个k空间矩阵不完全填充，使得对于 相同的相位编码梯度，一个矩阵包含较高强度的接收信号，并且至少另一个矩阵不包含信号，并且所述单个k空间矩阵是通过取部分平均值来生成的。

    Method for generating 2D or 3D maps of MRI T1 and T2 relaxation times
    57.
    发明公开
    Method for generating 2D or 3D maps of MRI T1 and T2 relaxation times 审中-公开
    一种用于产生2D或3D的T1和T2松弛时间图在成像的磁共振方法

    公开(公告)号：EP2495579A1

    公开(公告)日：2012-09-05

    申请号：EP12157544.3

    申请日：2012-02-29

    申请人： Esaote S.p.A. ,  Consiglio Nazionale Delle Ricerche

    发明人： Palma, Giuseppe ,  Greco, Danilo ,  Innocenti, Stefania ,  Alfano, Bruno

    IPC分类号： G01R33/50 ,  G01R33/44

    CPC分类号： G01R33/50 ,  G01R33/448

    摘要： A method for generating 2D or 3D maps of MRI T1 and T2 relaxation times by acquiring 2D or 3D MRI gradient-echo images and extracting the T1 and T2 values from said images, wherein
    MRI images are acquired using a combination of gradient-echo sequences, including:
    a first MRI image acquired using a SSFP-FID (Steady State Free Precession - Free Induction Decay) acquisition sequence;
    two further images acquired using a Dual-Echo SSFP acquisition sequence;
    the T1 and T2 values are extracted for each image pixel or voxel from the corresponding MRI signals.

    摘要翻译： 一种用于通过获得2D或3D MRI梯度回波图像和从所述图像中提取的T1和T2的值，worin使用梯度回波序列的组合采集的MRI图像来生成MRI T1和T2弛豫时间的2D或3D地图的方法， 包括：使用SSFP FID（稳态自由进动 - 自由感应衰减）的第一MRI图像获取的获取序列; 使用双回波SSFP采集序列获取进一步的两个图像; T1和T2的值被提取以由对应的MRI信号中的每个图像像素或体素。