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    • 7. 发明授权
    • Method and apparatus for magnetic resonance imaging on the basis of a gradient echo sequence
    • 基于梯度回波序列进行磁共振成像的方法和装置
    • US08185188B2
    • 2012-05-22
    • US11588710
    • 2006-10-26
    • Andreas GreiserCarmel HayesWilfried LandschützPeter Speier
    • Andreas GreiserCarmel HayesWilfried LandschützPeter Speier
    • A61B5/055
    • G01R33/5613G01R33/567
    • 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.
    • 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)。
    • 8. 发明申请
    • Method and apparatus for magnetic resonance imaging on the basis of a gradient echo sequence
    • 基于梯度回波序列进行磁共振成像的方法和装置
    • US20070106150A1
    • 2007-05-10
    • US11588710
    • 2006-10-26
    • Andreas GreiserCarmel HayesWilfried LandschutzPeter Speier
    • Andreas GreiserCarmel HayesWilfried LandschutzPeter Speier
    • A61B5/05
    • G01R33/5613G01R33/567
    • 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.
    • 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)。