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    Method and apparatus for magnetic resonance imaging on the basis of a gradient echo sequence
    1.
    发明授权
    Method and apparatus for magnetic resonance imaging on the basis of a gradient echo sequence 有权
    基于梯度回波序列进行磁共振成像的方法和装置

    公开(公告)号：US08185188B2

    公开(公告)日：2012-05-22

    申请号：US11588710

    申请日：2006-10-26

    申请人： Andreas Greiser ,  Carmel Hayes ,  Wilfried Landschütz ,  Peter Speier

    发明人： Andreas Greiser ,  Carmel Hayes ,  Wilfried Landschütz ,  Peter Speier

    IPC分类号： A61B5/055

    CPC分类号： G01R33/5613 ,  G01R33/567

    摘要： In a method and apparatus for magnetic resonance imaging on the basis of a gradient echo sequence by excitation of nuclear spins and measurement of radio-frequency signals indicating the excited nuclear spins, a) the pulse frequency of the person to be examined is determined, b) the magnetization of the spins is prepared by means of an RF pulse block, c) a number of steps of the spin excitation as well as measurement of an RF response signal are implemented, with the measurement data along a trajectory established by projection gradients being acquired along a first slice established by a slice-selection gradient, d) items b) through c) are repeated multiple times for the first slice, with each repetition of the steps b) through c) ensuing within a time interval that is fixed in duration, and the interval is temporally displaced relative to the determined pulse frequency for at least one portion of the repetitions, and e) items b) through d) are repeated for various slices.

    摘要翻译： 在通过激励核自旋的梯度回波序列和表示激发的核自旋的射频信号的测量的磁共振成像的方法和装置中，a）确定被检查者的脉冲频率，b ）通过RF脉冲块来准备自旋的磁化，c）实现了自旋激发的多个步骤以及RF响应信号的测量，沿着由投影梯度建立的轨迹的测量数据是 沿着由切片选择梯度建立的第一切片获取，d）对于第一切片重复多次的项目b）至c），其中步骤b）至c）的每个重复在随后的固定的时间间隔内 并且对于至少一部分重复，间隔相对于所确定的脉冲频率在时间上移位，并且e）对于各种切片重复项目b）至d）。

    CORRECTION OF IMAGING METHODS IN A MAGNETIC RESONANCE DEVICE
    2.
    发明申请
    CORRECTION OF IMAGING METHODS IN A MAGNETIC RESONANCE DEVICE 有权
    磁共振装置中成像方法的校正

    公开(公告)号：US20160146908A1

    公开(公告)日：2016-05-26

    申请号：US14938255

    申请日：2015-11-11

    申请人： Michael Köhler ,  Wilfried Landschütz ,  Jürgen Nistler ,  Markus Vester

    发明人： Michael Köhler ,  Wilfried Landschütz ,  Jürgen Nistler ,  Markus Vester

    IPC分类号： G01R33/24 ,  G06T7/00 ,  G06T3/40 ,  G01R33/565

    CPC分类号： G01R33/246 ,  G01R33/5659

    摘要： In a method, by a magnetic resonance device, a transmit B1 field map is determined for a region, a plurality of MR images of at least one part of the region are acquired using transmitter settings differing from each other, and signal intensities of individual pixels measured by the MR images are interpolated by the transmit B1 field map. A correction of the signal intensities may also be effected by carrying out a receive B1 correction by a spatial mirroring of the transmit B1 field map on a symmetry plane of a measured object. A magnetic resonance device is used to carry out the method. The method may be applied, for example, in medical diagnostics.

    摘要翻译： 在一种方法中，通过磁共振装置，为区域确定发射B1场图，使用彼此不同的发射机设置获取区域的至少一部分的多个MR图像，以及各个像素的信号强度 由MR图像测量由发送B1场图进行内插。 信号强度的校正也可以通过在测量对象的对称平面上通过发射B1场图的空间镜像进行接收B1校正来实现。 磁共振装置用于执行该方法。 该方法可以应用于例如医学诊断。