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    • 1. 发明申请
    • METHOD OF OSCILLOGRAM FILTERING FOR RADIAL MRI DATA
    • 用于径向MRI数据的OSCILLOGRAM滤波方法
    • US20130085374A1
    • 2013-04-04
    • US13638465
    • 2011-03-31
    • Curtis A. CorumDjaudat S. IdiyatullinSteen MoellerMichael G. Garwood
    • Curtis A. CorumDjaudat S. IdiyatullinSteen MoellerMichael G. Garwood
    • A61B5/055A61B5/00
    • A system includes a data receiver, a sinogram generator, a processor, a filter module, and an output module. The data receiver is configured to receive radial ordered magnetic resonance data. The sinogram generator is configured to generate a first sinogram corresponding to a view angle as a function of a readout direction for the magnetic resonance data. The processor is configured to generate an oscillogram having an angular frequency axis. The oscillogram corresponds to a Fourier transform of the first sinogram. The filter module is configured to selectively filter a peak in a projection formed along a selected axis of the oscillogram, the peak being related to an interference signal such as an RF interference. The selected axis is orthogonal to the angular frequency axis. The output module is configured to form a second sinogram corresponding to a transform of the filtered projection
    • 系统包括数据接收器,正弦图发生器,处理器,滤波器模块和输出模块。 数据接收器被配置为接收径向有序磁共振数据。 正弦图发生器被配置为根据用于磁共振数据的读出方向产生对应于视角的第一正弦图。 处理器被配置为生成具有角频率轴的波形图。 波形图对应于第一个正弦图的傅里叶变换。 滤波器模块被配置为选择性地滤波沿着所述波形图的选定轴形成的投影中的峰值,所述峰值与诸如RF干扰之类的干扰信号有关。 所选轴与角频率轴正交。 输出模块被配置为形成对应于滤波投影的变换的第二正弦图