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公开(公告)号：US10914798B2
公开(公告)日：2021-02-09
申请号：US14038958
申请日：2013-09-27
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
摘要： A method for estimating a coil sensitivity map for a magnetic resonance (MR) image includes providing a matrix A of sliding blocks of a 3D image of coil calibration data, calculating a left singular matrix V∥ from a singular value decomposition of A corresponding to τ leading singular values, calculating P=V∥V∥H, calculating a matrix that is an inverse Fourier transform of a zero-padded matrix P, and solving 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 ) ) .
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2.发明申请Isotropic Volume Reconstruction from Multiple 2D Scans Using Super -Resolution Techniques 有权使用超分辨率技术从多个2D扫描的各向同性体重建公开(公告)号：US20170061652A1
公开(公告)日：2017-03-02
申请号：US14842157
申请日：2015-09-01
发明人： Ti-chiun Chang , Xiaoguang Lu , Peter Speier
CPC分类号： G06T11/005 , G01R33/4835 , G01R33/5608 , G06K9/522 , G06T5/20 , G06T7/0012 , G06T2207/10088
摘要： A computer-implemented method for performing isotropic reconstruction of Magnetic Resonance Imaging (MRI) data includes receiving a stack of slices acquired by an MRI device in two or more directions and reslicing the stack of slices into (i) an acquired view stack comprising high-resolution slices acquired in-plane, and (ii) a reslice stack comprising degraded slices acquired out of plane. An estimated slice profile is generated based on the stack of slices and the acquired view stack is convolved with the estimated slice profile to yield a simulated distorted slice stack. The simulated distorted slice stack is subtracted from the acquired view stack to yield a high-frequency band estimate and the high-frequency band estimate is combined with the reslice stack to yield isotropic reconstruction results.
摘要翻译： 用于执行磁共振成像（MRI）数据的各向同性重建的计算机实现的方法包括：在两个或更多个方向上接收由MRI装置获取的切片堆叠，并将所述切片堆叠成（i）获取的视图堆叠， 在平面内获取的分辨率切片，以及（ii）包括从平面获取的退化切片的重叠堆叠。 基于片堆栈生成估计切片轮廓，并且获取的视图堆叠与估计的切片轮廓卷积以产生模拟失真的切片堆叠。 从获取的视图堆栈中减去模拟失真的片层叠，以产生高频带估计，并将高频带估计与重叠堆组合以产生各向同性重建结果。
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公开(公告)号：US09684982B2
公开(公告)日：2017-06-20
申请号：US14842157
申请日：2015-09-01
发明人： Ti-chiun Chang , Xiaoguang Lu , Peter Speier
CPC分类号： G06T11/005 , G01R33/4835 , G01R33/5608 , G06K9/522 , G06T5/20 , G06T7/0012 , G06T2207/10088
摘要： A computer-implemented method for performing isotropic reconstruction of Magnetic Resonance Imaging (MRI) data includes receiving a stack of slices acquired by an MRI device in two or more directions and reslicing the stack of slices into (i) an acquired view stack comprising high-resolution slices acquired in-plane, and (ii) a reslice stack comprising degraded slices acquired out of plane. An estimated slice profile is generated based on the stack of slices and the acquired view stack is convolved with the estimated slice profile to yield a simulated distorted slice stack. The simulated distorted slice stack is subtracted from the acquired view stack to yield a high-frequency band estimate and the high-frequency band estimate is combined with the reslice stack to yield isotropic reconstruction results.
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