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    Magnetic resonance imaging method for imaging time-dependent contrast
    1.
    发明授权
    Magnetic resonance imaging method for imaging time-dependent contrast 失效
    用于成像时间依赖对比的磁共振成像方法

    公开(公告)号：US06577127B2

    公开(公告)日：2003-06-10

    申请号：US09817097

    申请日：2001-03-26

    申请人： Paul Royston Harvey ,  Johan Samuel Van Den Brink ,  Romhild Martijn Hoogeveen ,  Gabriele Marianne Beck ,  Gerrit Hendrik Van Yperen

    发明人： Paul Royston Harvey ,  Johan Samuel Van Den Brink ,  Romhild Martijn Hoogeveen ,  Gabriele Marianne Beck ,  Gerrit Hendrik Van Yperen

    IPC分类号： G01V300

    CPC分类号： G01R33/561 ,  G01R33/281 ,  G01R33/4824 ,  G01R33/5619 ,  G01R33/563 ,  G01R33/56308

    摘要： A magnetic resonance imaging method is proposed wherein the MR signal acquisition is performed by separate scanning of central (40) and peripheral (70) sectors. Central and peripheral sectors are selected in an individual plane in the k-space and optionally an intermediate sector (50) between the peripheral and central sectors is also selected. The center (O) in the k-space in the individual plane at issue is situated within the central sector. The scanning of the k-space commences outside the center of the k-space and before or during increasing contrast. Preferably, the scanning is timed such that the center of the k-space is reached at maximum contrast (MR angiography) or at the value zero of the longitudinal magnetization (MR inversion recovery). The central sector is advantageously scanned in a stochastic order. The peripheral sector may be scanned along a spiral-shaped trajectory, radial trajectories or along high-low ordered lines.

    摘要翻译： 提出了一种磁共振成像方法，其中通过中央（40）和外围（70）扇区的单独扫描来执行MR信号采集。 在k空间中的单个平面中选择中央和外围扇区，并且还可以选择外围和中央扇区之间的中间扇区（50）。 所涉及的个别飞机上的k空间中心（O）位于中央部门。 k空间的扫描在增加对比度之前或期间在k空间的中心外部开始。 优选地，扫描被定时使得以最大对比度（MR血管造影）达到k空间的中心或者在纵向磁化（MR反转恢复）的值为零。 中央扇区有利地以随机顺序扫描。 外围扇区可以沿着螺旋形轨迹，径向轨迹或沿着高低有序线扫描。

    Magnetic resonance imaging method involving sub-sampling
    3.
    发明授权
    Magnetic resonance imaging method involving sub-sampling 有权
    磁共振成像方法涉及次采样

    公开(公告)号：US07215190B2

    公开(公告)日：2007-05-08

    申请号：US10496388

    申请日：2002-11-20

    申请人： Romhild Martijn Hoogeveen ,  Frederik Visser ,  Lolkje Frederika Zoer ,  Willem Marten Prins ,  Johan Samuel Van Den Brink

    发明人： Romhild Martijn Hoogeveen ,  Frederik Visser ,  Lolkje Frederika Zoer ,  Willem Marten Prins ,  Johan Samuel Van Den Brink

    IPC分类号： G01V3/00

    CPC分类号： G01R33/4833 ,  G01R33/3415 ,  G01R33/5611

    摘要： In a magnetic resonance imaging method magnetic resonance signal samples are received for a predetermined field of view by a receiving antenna having a spatial sensitivity profile. The sampling in the k space corresponds to the predetermined field of view in the geometrical space. Folded-over images having folded-over pixel values are reconstructed from the sampled magnetic resonance signals. Pixel contributions for spatial positions within the predetermined field of view are calculated from the folded-over pixel values and the spatial sensitivity profile of the receiver antenna. The magnetic resonance image is formed from the pixel contributions for spatial positions within the predetermined field of view. Thus, aliasing or fold-over artefacts caused by a field of view that is too small are avoided.

    摘要翻译： 在磁共振成像方法中，通过具有空间灵敏度分布的接收天线，对于预定的视场来接收磁共振信号样本。 k空间中的采样对应于几何空间中的预定视场。 从采样的磁共振信号重建具有折叠像素值的折叠图像。 根据接收天线的折叠像素值和空间灵敏度曲线计算预定视场内的空间位置的像素贡献。 磁共振图像由预定视野内的空间位置的像素贡献形成。 因此，避免了由视场太小引起的混叠或折叠伪影。

    Magnetic resonance imaging of several volumes
    4.
    发明授权
    Magnetic resonance imaging of several volumes 有权
    磁共振成像的几卷

    公开(公告)号：US06479996B1

    公开(公告)日：2002-11-12

    申请号：US09613226

    申请日：2000-07-10

    申请人： Romhild Martijn Hoogeveen ,  Diana Maria Francisca Geraats ,  Tim Leiner ,  Kai Yiu J. A. M. Ho

    发明人： Romhild Martijn Hoogeveen ,  Diana Maria Francisca Geraats ,  Tim Leiner ,  Kai Yiu J. A. M. Ho

    IPC分类号： G01V300

    CPC分类号： G01R33/4835

    摘要： A magnetic resonance imaging method involves acquisition of sets of magnetic resonance signals from several scan-volumes of an object. According to the invention different spatial approaches are taken in the scanning of the respective scan-volumes. In particular_respective scan-volumes include different numbers of scan-slices or scan slices of respective scan-volumes have different slice-thickness or scan-slices of respective scan-volumes have different fields-of-view or scan-slices of respective scan-volumes have different numbers of scanned points in k-space.

    摘要翻译： 磁共振成像方法包括从物体的几个扫描体积获取一组磁共振信号。 根据本发明，在扫描各扫描体积时采取不同的空间方法。 在特定的扫描体积中包括不同数目的扫描片或相应扫描体积的扫描片具有相应扫描体积的不同切片厚度或扫描切片具有不同的扫描体积的视场或扫描切片 在k空间中具有不同数量的扫描点。

    RF coil system for an MRI system with a fixed coil and with a moving coil part below the patient support
    7.
    发明授权
    RF coil system for an MRI system with a fixed coil and with a moving coil part below the patient support 有权
    RF线圈系统，用于具有固定线圈和在患者支架下方的移动线圈部分的MRI系统

    公开(公告)号：US07602186B2

    公开(公告)日：2009-10-13

    申请号：US10597763

    申请日：2005-02-03

    申请人： Romhild Martijn Hoogeveen

    发明人： Romhild Martijn Hoogeveen

    IPC分类号： G01V3/00

    CPC分类号： G01R33/341

    摘要： The present invention relates to an RF system for a magnetic resonance imaging device (13). The RF system comprises an RF transmitter coil subsystem and an RF receiver coil subsystem (18), wherein the RF receiver coil subsystem comprises at least one first coil-like element (19) and at least one second coil-like element (20), wherein the or each first coil-like element is assigned to a main magnet system (15) of the magnetic resonance imaging device, and wherein the or each second coil-like element is assigned to an object (14) to be analyzed by the magnetic resonance imaging device.

    摘要翻译： 本发明涉及一种用于磁共振成像装置（13）的RF系统。 RF系统包括RF发射器线圈子系统和RF接收器线圈子系统（18），其中RF接收器线圈子系统包括至少一个第一线圈状元件（19）和至少一个第二线圈状元件（20）， 其中所述或每个第一线圈状元件被分配给所述磁共振成像装置的主磁体系统（15），并且其中所述或每个第二线圈状元件被分配给待由磁体分析的对象（14） 共振成像装置。

    Magnetic Resonance Imaging With Several Types of Contrast
    8.
    发明申请
    Magnetic Resonance Imaging With Several Types of Contrast 审中-公开
    磁共振成像与几种类型的对比

    公开(公告)号：US20080197846A1

    公开(公告)日：2008-08-21

    申请号：US12066269

    申请日：2006-09-08

    申请人： Romhild Martijn Hoogeveen ,  Jan Frans Lodewijk De Becker ,  Peter Boernert ,  Johannes Adrianus Overweg

    发明人： Romhild Martijn Hoogeveen ,  Jan Frans Lodewijk De Becker ,  Peter Boernert ,  Johannes Adrianus Overweg

    IPC分类号： G01R33/54

    CPC分类号： G01R33/561

    摘要： A magnetic resonance imaging system comprises a signal acquisition system to acquire magnetic resonance signals. A reconstructor reconstructs magnetic resonance images from the acquired magnetic resonance signals. The signal acquisition system and/or the reconstructor are controlled to perform overhead activities separately from actual acquisition of the magnetic resonance signals notably for different contrast types. Accordingly, time efficient signal acquisition for multiple contrasts is achieved.

    摘要翻译： 磁共振成像系统包括用于获取磁共振信号的信号采集系统。 重构器从获取的磁共振信号重建磁共振图像。 控制信号采集系统和/或重构器以独立于实际获取磁共振信号以独特地对于不同对比度类型进行开销活动。 因此，实现了多个对比度的时间有效的信号采集。

    Rf Coil System For an Mri System With a Fixed and Moving Part
    9.
    发明申请
    Rf Coil System For an Mri System With a Fixed and Moving Part 有权
    用于具有固定和移动部件的Mri系统的Rf线圈系统

    公开(公告)号：US20080150535A1

    公开(公告)日：2008-06-26

    申请号：US10597763

    申请日：2005-02-03

    申请人： Romhild Martijn Hoogeveen

    发明人： Romhild Martijn Hoogeveen

    IPC分类号： G01R33/28

    CPC分类号： G01R33/341

    摘要： The present invention relates to an RF system for a magnetic resonance imaging device (13). The RF system comprises an RF transmitter coil subsystem and an RF receiver coil subsystem (18), wherein the RF receiver coil subsystem comprises at least one first coil-like element (19) and at least one second coil-like element (20), wherein the or each first coil-like element is assigned to a main magnet system (15) of the magnetic resonance imaging device, and wherein the or each second coil-like element is assigned to an object (14) to be analyzed by the magnetic resonance imaging device.

    摘要翻译： 本发明涉及一种用于磁共振成像装置（13）的RF系统。 RF系统包括RF发射器线圈子系统和RF接收器线圈子系统（18），其中RF接收器线圈子系统包括至少一个第一线圈状元件（19）和至少一个第二线圈状元件（20）， 其中所述或每个第一线圈状元件被分配给所述磁共振成像装置的主磁体系统（15），并且其中所述或每个第二线圈状元件被分配给待由磁体分析的对象（14） 共振成像装置。