公开(公告)号：US07408345B2

公开(公告)日：2008-08-05

申请号：US11348852

申请日：2006-02-06

申请人： Roland Bammer ,  Chunlei Liu

发明人： Roland Bammer ,  Chunlei Liu

IPC分类号： G01V3/00

CPC分类号： G01R33/5611 ,  G01R33/4824 ,  G01R33/56308 ,  G01R33/56341 ,  G01R33/56509 ,  G01R33/5676

摘要： Disclosed is an effective algorithm to correct motion-induced phase error using an iterative reconstruction. Using a conjugate-gradient (CG) algorithm, the phase error is treated as an image encoding function. Given the complex perturbation terms, diffusion-weighted images can be reconstructed using an augmented sensitivity map. The mathematical formulation and image reconstruction procedures are similar to the SENSE reconstruction. By defining a dynamic composition sensitivity, the CG phase correction method can be conveniently incorporated with SENSE reconstruction for the application of multi-shot SENSE DWI. Effective phase correction and multi-shot SENSE DWI (R=1 to 3) are demonstrated on both simulated and in vivo data acquired with PROPELLER and SNAILS.

摘要翻译： 公开了一种使用迭代重建来校正运动诱发相位误差的有效算法。 使用共轭梯度（CG）算法，相位误差被视为图像编码功能。 给定复杂的扰动项，扩散加权图像可以使用增强的灵敏度图重建。 数学公式和图像重建程序与SENSE重建相似。 通过定义动态组合灵敏度，CG相位校正方法可以方便地结合SENSE重建用于多镜头SENSE DWI的应用。 在使用PROPELLER和SNAILS获取的模拟和体内数据中都可以证明有效的相位校正和多镜头SENSE DWI（R = 1到3）。