The Method of MR Images Motion Artifacts Fast Suppression Based on Structure Remains

HE Ning; L; Uuml

doi:10.3969/j.issn.0372-2112.2013.07.012

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The Method of MR Images Motion Artifacts Fast Suppression Based on Structure Remains

更新时间：2025-07-16

- The Method of MR Images Motion Artifacts Fast Suppression Based on Structure Remains
- Acta Electronica Sinica Vol. 41, Issue 7, Pages: 1319-1323(2013)
- 作者机构：
  
  1. 北京联合大学北京市信息服务工程重点实验室,北京,100101
  2. 中国科学院大学,北京,100049
  3. 沈阳工程学院,辽宁,沈阳,110136
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2013.07.012
  CLC： TP391
- Published：2013
- 稿件说明：
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HE Ning, L, Uuml. The Method of MR Images Motion Artifacts Fast Suppression Based on Structure Remains[J]. Acta Electronica Sinica, 2013, 41(7): 1319-1323.
DOI：

HE Ning, L, Uuml. The Method of MR Images Motion Artifacts Fast Suppression Based on Structure Remains[J]. Acta Electronica Sinica, 2013, 41(7): 1319-1323. DOI： 10.3969/j.issn.0372-2112.2013.07.012.

摘要

目前核磁共振图像运动伪影的校正方法普遍是基于K空间数据的方法

本文提出一种直接对核磁共振图像进行伪影校正的后处理方法.基于非局部均值总变差去噪的思想设计构造了结构保持的运动伪影校正模型

该模型由非局部均值正则项和块相似保真项构成

正则项可以有效去除运动伪影和噪声的同时保持图像的结构;将各向异性结构张量作为块相似保真项中的权函数

实现在不同区域有不同的扩散方式

在去除图像运动伪影的同时保留图像的细节信息.模型的数值求解采用分裂Bregman方法实现.本文提出的方法充分考虑了图像的几何结构特性

实验结果表明

该方法能有效去除运动伪影并保留有价值的图像细节信息

同时提高了运算速度.

Abstract

The current methods of motion artifact suppression in magnetic resonance imaging(MRI) are generally based on the K-space data.In this paper

an image post-processing method is proposed

which can directly apply to the MR images and correct the motion artifact.We designed a model based on non-local means total variational (TV) method

which consists of the non-local regularization term and patch similarity fidelity term.The regularization term can keep the image structure while correcting the motion artifact.Introduce the anisotropic diffusion structure tensor to the patch similarity fidelity term as its weight function

which can implement different diffusions process in different regions and can remain the details of the image while removing the motion artifact.The numerical scheme uses the split Bregman method.Experiments showed that the motion artifact was effectively reduced and the valuable details of images were remained and the arithmetic speed was improved.

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Affine Motion Compensation with Improved Reconstruction in PROPELLER MRI

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