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11.
公开(公告)号:US20130289912A1
公开(公告)日:2013-10-31
申请号:US13779999
申请日:2013-02-28
申请人: Jun Liu , Hui Xue , Marcel Dominik Nickel , Ti-chiun Chang , Mariappan S. Nadar , Alban Lefebvre , Edgar Mueller , Qiu Wang , Zhili Yang , Nirmal Janardhanan , Michael Zenge
发明人: Jun Liu , Hui Xue , Marcel Dominik Nickel , Ti-chiun Chang , Mariappan S. Nadar , Alban Lefebvre , Edgar Mueller , Qiu Wang , Zhili Yang , Nirmal Janardhanan , Michael Zenge
IPC分类号: G01R33/24
CPC分类号: G01R33/243 , G01R33/246 , G01R33/5611
摘要: A method for estimating a coil sensitivity map for a magnetic resonance (MR) image includes providing (61) a matrix A of sliding blocks of a 2D image of coil calibration data, calculating (62) a left singular matrix V∥ from a singular value decomposition of A corresponding to τ leading singular values, calculating (63) P=V∥V∥H, calculating (64) a matrix S that is an inverse Fourier transform of a zero-padded matrix P, and solving (65) MHcr=(Sr)Hcr for cr, where cr is a vector of coil sensitivity maps for all coils at spatial location r, and M ( ( 1 1 … 1 0 0 … 0 … … … 0 0 … 0 ) ( 0 0 … 0 1 1 … 1 … … … 0 0 … 0 ) … ( 0 0 … 0 0 0 … 0 … … … 1 1 … 1 ) ) .
摘要翻译: 用于估计磁共振(MR)图像的线圈灵敏度映射的方法包括提供(61)线圈校准数据的2D图像的滑块的矩阵A,从奇异值计算(62)左奇异矩阵V∥ 计算(63)P = V || V | H,计算(64)作为零填充矩阵P的逆傅里叶变换的矩阵S,求解(65)MHcr = (Sr)Hcr,其中cr是空间位置r处所有线圈的线圈灵敏度图的向量,M((1 1 ... 1 0 0 ... 0 ... ... ... 0 0 ... 0)0(0 0 ... 0 1 1 ... 1 ... ... ... 0 0 ... 0) 0 0 0 ... 0 ... ... ... 1 1 ... 1))。