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1. 发明申请

WO2016174497A1 SYSTEM AND METHOD FOR IMAGE WARP CORRECTION FOR MAGNETIC RESONANCE IMAGING 审中-公开
标题翻译：用于磁共振成像的图像温度校正的系统和方法
公开(公告)号：WO2016174497A1
公开(公告)日：2016-11-03
申请号：PCT/IB2015/053059
申请日：2015-04-27
申请人： SYNAPTIVE MEDICAL (BARBADOS) INC. , PANTHER, Alexander Gyles , HARRIS, Chad Tyler , BEATTY, Phillip J.
发明人： PANTHER, Alexander Gyles , HARRIS, Chad Tyler , BEATTY, Phillip J.
IPC分类号： G01R33/565
CPC分类号： G01R33/56572 , G01R33/385 , G01R33/4818 , G01R33/4822
摘要： A method of correcting warping of an acquired image in an MRI system, caused by non- linearities in gradient field profiles of gradient coils is set forth, comprising a) constructing a computer model representing conducting pathways for each gradient coil in said MRI system; b) calculating a predicted magnetic field at each point in space for each said gradient coil in said model; c) measuring actual magnetic field at each point in space for each said gradient coil in said MRI system; d) verifying accuracy of said model by comparing said predicted magnetic field to said actual magnetic field at each said point in space and in the event said model is not accurate then repeating a) – d), and in the event said model is accurate then; constructing a distortion map for mapping coordinates in real space to coordinates in warped space of said acquired image based on deviations of said predicted magnetic field from linearity; and unwarping said warping of the acquired image using said distortion map.
摘要翻译：提出了一种校正由梯度线圈的梯度场分布中的非线性引起的MRI系统中获得的图像的翘曲的方法，包括：a）构建表示所述MRI系统中每个梯度线圈的导电路径的计算机模型; b）在所述模型中计算每个所述梯度线圈的每个空间点处的预测磁场; c）测量所述MRI系统中每个所述梯度线圈的每个空间点处的实际磁场; d）通过将所述预测磁场与空间中的每个所述点处的所述实际磁场进行比较并且在所述模型不准确然后重复a）至d）的情况下验证所述模型的精确度，并且在所述模型是准确的情况下 ; 根据所述预测磁场的偏离线性，构造用于将实空间中的坐标映射到所述获取图像的翘曲空间中的坐标的失真图; 并且使用所述失真图来不理想所获取的图像的所述翘曲。

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