北京生物医学工程

基于K空间的MR截断伪影去除算法

Truncation artifact removal in MR images based on K-space

作者：王甜甜王道雄

单位：                                 华中科技大学同济医学院附属同济医院（武汉430030）            

关键词：截断伪影；MR；K空间

分类号：

出版年·卷·期（页码）：2015·34·4（375-378）

摘要：

目的根据MR截断伪影产生的原理，设计了一种基于K空间的截断伪影去除算法。方法对伪影图像进行处理后提取K空间高频数据，将高频数据与原伪影图像的K空间融合得出最终完整的K空间，再经过重建达到去除伪影的目的。结果在模拟数据试验和临床图片实验中，MR截断伪影都得到改善。结论本文提出的基于K空间的算法对截断伪影有一定的去除效果，但图像域效果比较微弱，算法有待改进。

Objective To design a truncation artifact removal in MR images based on K-space. Methods We extract K-space high-frequency data after artifact processing, add the high-frequency data to the original K-space of artifact images in order to obtain the final complete K-space, and then get the artifact removing effect after reconstruction. Results Through simulated data and clinical picture experiments, MR truncation artifacts are improved. Conclusions The algorithm based on K-space has certain removal effect on truncation artifacts, yet relatively weak, which need to be improved.

参考文献：

［1］黄鑫. 医学磁共振图像Gibbs环状伪影消除新方法研究［D］.广州：南方医科大学，2005.
Huang Xin. Medical magnetic resonance image Gibbs ring artifacts eliminate new method［D］. Guangzhou: Southern Medical University,2005.
［2］潘屏南, 李树详, 林意群. 现代大型医用设备［M］.北京:中国医药科技出版社, 2002: 230-241.
Pan Pingnan, Li Shuxiang, Lin Yiqun. Modern Large Medical Devices ［M］. Beijing: Chinese Medical Science and Technology Press, 2002: 230-241.
［3］冯衍秋.基于PROPELLER采样的磁共振成像运动伪影消除方法研究［J］.第一军医大学学报,2005,27(1):15-18.
Feng Yanqiu. The magnetic resonance imaging method to eliminate motion artifacts based on PROPELLER sampling［J］.First Military Medical University, 2005,27 (1) :15-18.
［4］胡丽丽,夏黎明,曾仁端,等. MRI伪影探讨与分析(二)［J］.放射学实践，2002,17(1):87-88.
［5］陈渊博,陈春晓,周卉芬.磁共振成像中伪影的研究［J］. Int J Biomed Eng,2006,29(4):214-218.
Chen Yuanbo, Chen Chunxiao, Chen Huifen. Research artifacts in magnetic resonance imaging ［J］. Int J Biomed Eng, 2006,29 (4) :214-218.
［6］Dym H, McKean HP. Fourier Series and Integrals［M］. New York: Academic, 1972. 43-44.
［7］Smith MR. Applications of auto regressive moving average parametric modeling in magnetic resonance imaging reconstruction［ J ］ .IEEE Trans Med Imaging,1986,5(3):132-139.
［8］方青.磁共振部分K空间数据图像重构［D］.上海:上海交通大学,2007.
Fang Qing. Magnetic resonance image reconstruction part of the K-space data［D］. Shanghai: Shanghai Jiaotong University, 2007.
［9］王卫东,包尚联, 俎栋林.利用信号外推实现磁共振快速成像［J］.中国生物医学工程学报,2000,19 (1): 78-83,92.
Wang Weidong, Bao Shanglian, Zu Donglin. Implementation of fast MR imaging using extrapolation of signals［J］. Chinese Journal of Biomedical Engineering, 2000, 19 (1):78-83,92.
［10］Archibald R, Gelb A. A method to reduce the Gibbs ringing artifact in MRI scans while keeping tissue boundary integrity［J］. IEEE Trans Med Imaging, 2002, 21(4): 305-319.
［11］刘正敏.数字化MRI谱仪系统的研究与设计［D］.合肥：中国科学技术大学,2007.
Liu Zhengmin. Research and design of digital MRI spectrometer system［D］. Heifei: University of Science and Technology of China, 2007.
［12］翁得河.MRI移动伪影的去除与图像增强方法［D］.北京：中国科学院电工研究所,2002.
Weng Dehe. Removal and image enhancement MRI move artifacts［D］. Beijing: Institute of Electrical Engineering, 2002.
［13］Laundre BJ, Jellison BJ, Badie B, et al. Diffusion tensor imaging of the corticospinal tract before and after mass resection as correlated with clinical motor findings: preliminary data(2005) ［J］. American Journal of Neuroradiology,2005,26(4):791-796.
［14］Bydder M, Robson MD. Partial fourier partially parallel imaging［J］. Magnetic Resonance in Medicine, 2005, 53:1393-1401.
［15］Shizgal BD, Jung JH. Towards the resolution of the Gibbs phenomena［J］. J Comput Appl Math,2003,161(1): 41-65.

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