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	A new method for removing motion artifacts in parallel MRI reconstruction
	Zhuo Weng; Guo-Xi Xie; Xin Liu; Hai-Rong Zheng; Cheng-Yi Xiong
	2010
会议名称	3rd International Conference on BioMedical Engineering and Informatics, BMEI 2010
会议地点	Yantai, China
英文摘要	The speed of MR acquisition can be increased by decreasing the number of sequential phase encodes by means of arrays of multiple receiver coils. However, coil data are frequently corrupted due to involuntary movement during the data acquisition, which in turn have a significant influence on reconstructed composite image. In this article, a new method called Weighted-Sum-of-Squares (WSOS) is proposed to remove artifacts in the reconstructed images. The method firstly adopts homomorphic filtering and B-spline smoothing to obtain a group of uniform brightness phased array coil images, and then accurately estimated corrupt samples based on mutual information between the coil images. Finally, weights are redistributed utilizing estimative knowledge in the following combined process. In this way, the influence of corrupt samples is attenuated so that motion artifacts in reconstructed images could be effectively reduced. The abdomen and brain experiments show that the new method reduces the motion artifacts caused by the corrupt data in the reconstructed images and the benefits are demonstrated as well by comparing it to conventional method.
收录类别	EI
语种	英语
内容类型	会议论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/3008]
专题	深圳先进技术研究院_医工所
作者单位	2010
推荐引用方式 GB/T 7714	Zhuo Weng,Guo-Xi Xie,Xin Liu,et al. A new method for removing motion artifacts in parallel MRI reconstruction[C]. 见:3rd International Conference on BioMedical Engineering and Informatics, BMEI 2010. Yantai, China.

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