公开(公告)号：US06268729B1

公开(公告)日：2001-07-31

申请号：US09137373

申请日：1998-08-20

申请人： Miha Fuderer ,  Cornelis L. G. Ham ,  Joost M. De Haan ,  Johannes H. Den Boef

发明人： Miha Fuderer ,  Cornelis L. G. Ham ,  Joost M. De Haan ,  Johannes H. Den Boef

IPC分类号： G01V300

CPC分类号： G01R33/565

摘要： The invention relates to a method and a device for the imaging of a part of an object which is arranged in a steady magnetic field. The method according to the invention includes a step for filtering the shot noise from the measured MR signals. Filtering is performed by determining in a first step the value of a combination of a value of a parameter of a measuring point of the MR signal to be corrected and values of the parameter of measuring points in a vicinity of the measuring point. If the value of this combination exceeds a predetermined reference, the value zero is assigned to the value to be corrected. The invention is based on the idea that for a substantial part of the k space the corresponding MR signals behave as white noise. The reference is determined from the statistical distribution of the white noise. If the value of the combination exceeds the reference, it is assumed that a measuring point has been affected by shot noise.

摘要翻译： 本发明涉及一种用于成像被配置在稳定磁场中的物体的一部分的方法和装置。 根据本发明的方法包括从所测量的MR信号中滤波发射噪声的步骤。 通过在第一步骤中确定要校正的MR信号的测量点的参数的值与测量点附近的测量点的参数的值的组合来执行滤波。 如果该组合的值超过预定的参考值，则将零值分配给要校正的值。 本发明基于以下思想：对于k空间的大部分，相应的MR信号表现为白噪声。 参考是从白噪声的统计分布确定的。 如果组合的值超过参考值，则假定测量点受到喷射噪声的影响。