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1. 发明申请

WO2016198362A1 MRI WITH VARIABLE DENSITY SAMPLING 审中-公开
标题翻译：具有可变密度采样的MRI
公开(公告)号：WO2016198362A1
公开(公告)日：2016-12-15
申请号：PCT/EP2016/062819
申请日：2016-06-07
申请人： KONINKLIJKE PHILIPS N.V.
发明人： ZHAO, Chenguang , HUANG, Feng , YANG, Ming
IPC分类号： G01R33/48 , G01R33/561
CPC分类号： G01R33/4826 , G01R33/4818 , G01R33/482 , G01R33/4822 , G01R33/4824 , G01R33/561
摘要： The invention provides a device for producing a magnetic resonance image. The device comprises a collecting unit adapted for collecting k space samples that are located on a non-Cartesian grid in a non-Cartesian coordinate space or non-uniformly located on a Cartesian grid in a Cartesian coordinate space, the non-Cartesian/Cartesian coordinate space adapted to be decomposed into a plurality of subspaces, each of which extends along one or more coordinate axes of the non-Cartesian/Cartesian coordinate space; a weight calculation unit (203) adapted for calculating a decomposed sample density weight function of the k space samples in each individual subspace and determining a density weight function in the non-Cartesian/Cartesian coordinate space via a multiplication of the decomposed sample density weight functions of the k space samples in the plurality of subspaces; a gridding unit adapted for interpolating the k space samples in the non-Cartesian/Cartesian coordinate space onto a uniform Cartesian grid in a k space based on the density weight function of the k space samples in the non-Cartesian/Cartesian coordinate space; and a reconstructing unit adapted for reconstructing the magnetic resonance image based on the interpolated k space samples. By means of the invention, fast, preferably on-demand, calculation of the sampling density weights may be achieved.
摘要翻译：本发明提供一种用于产生磁共振图像的装置。该装置包括收集单元，其适于收集位于非笛卡尔坐标空间中的非笛卡尔网格上的非空间样本，或非均匀地位于笛卡尔坐标空间中的笛卡尔网格上的非笛卡尔/笛卡尔坐标适于分解成多个子空间的空间，每个子空间沿着非笛卡尔/笛卡尔坐标空间的一个或多个坐标轴延伸; 权重计算单元（203），用于计算每个单独子空间中的k空间样本的分解样本密度权重函数，并且通过分解的样本密度权重函数的乘积来确定非笛卡尔/笛卡尔坐标空间中的密度权重函数的多个子空间中的k个空间样本; 网格单元，用于基于非笛卡尔/笛卡尔坐标空间中的k空间样本的密度权重函数，将非笛卡尔/笛卡尔坐标空间中的k个空间样本内插到k空间中的均匀笛卡尔网格上; 以及重建单元，其适于基于插值的k空间样本重建所述磁共振图像。通过本发明，可以实现快速，优选按需的采样密度权重的计算。

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