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1. 发明申请

WO2003063702A1 磁気共鳴イメージング方法及び装置审中-公开
标题翻译：磁共振成像方法和装置
公开(公告)号：WO2003063702A1
公开(公告)日：2003-08-07
申请号：PCT/JP2003/000980
申请日：2003-01-31
申请人：株式会社日立メディコ , 熊井秀樹 , 川崎真司 , 竹内博幸
发明人：熊井秀樹 , 川崎真司 , 竹内博幸
IPC分类号： A61B5/055
CPC分类号： G01R33/5616 , A61B5/055 , A61B5/7257 , A61B5/7289 , G01R33/56341 , G01R33/56509 , G01R33/5676
摘要： Upon each data measurement after RF excitation pulse application for spread emphasis imaging, a body movement navigation echo is measured, so that one of them is used as a reference navigation echo. The reference navigation echo and the other navigation echoes are subjected to 1-dimensional Fourier transform in the lead-out direction and a 1-dimensional phase inclination is calculated from these data. The 1-dimensional phase inclination of the reference navigation echo is compared to that of the other navigation echoes, so as to determine whether the difference is within an allowable value. When the difference exceeds the allowable value, the echo signal corresponding to the navigation echo is decided not to be acceptable for correction by the navigation body movement correction method and not used for image re-construction. Measurement is again performed and an image is formed by using an echo signal measured with a navigation echo below the allowable value. Thus, the body movement component contained in the echo signal used in forming an image becomes uniform and a body movement artifact is removed.
摘要翻译：在RF激发脉冲应用之后进行每次数据测量，用于扩散强调成像，测量身体运动导航回波，使其中的一个被用作参考导航回波。参考导航回波和其他导航回波在导出方向进行1维傅里叶变换，并从这些数据计算出1维相位倾斜度。将参考导航回波的1维相位倾斜与其他导航回波的一维相位相比较，以确定该差是否在允许值内。当差异超过允许值时，与导航回波相对应的回波信号被判定为不能通过导航体运动校正方法进行校正，而不用于图像重建。再次进行测量，并且通过使用以导航回波测量的回波信号低于允许值来形成图像。因此，用于形成图像的回波信号中包含的身体运动成分变得均匀，并且去除身体运动伪像。

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