Accelerated susceptibility-based positive contrast imaging of MR compatible metallic devices based on modified fast spin echo sequences.

	Accelerated susceptibility-based positive contrast imaging of MR compatible metallic devices based on modified fast spin echo sequences.
	Shi, Caiyun; Zhang, Yongqin; Zhang, Xiaoyong; Chen, Min; Su, Shi; Dong, Ying; Liu, Xin; Ji, Jim; Xie, Guoxi
刊名	PHYSICS IN MEDICINE AND BIOLOGY
	2017
文献子类	期刊论文
英文摘要	This study aims to develop an accelerated susceptibility-based positive contrast MR imaging method for visualizing MR compatible metallic devices. A modified fast spin echo sequence is used to accelerate data acquisition. Each readout gradient in the modified fast spin echo is slightly shifted by a short distance Tshift. Phase changes accumulated within Tshift are then used to calculate the susceptibility map by using a kernel deconvolution algorithm with a regularized l1 minimization. To evaluate the proposed fast spin echo method, three phantom experiments were conducted and compared to a spin echo based technique and the gold standard CT for visualizing biopsy needles and brachytherapy seeds. Compared to the spin echo based technique, the data sampling speed of the proposed method was faster by 2-4 times while still being able to accurately visualize and identify the location of the biopsy needle and brachytherapy seeds. These results were confirmed by CT images of the same devices. Results also demonstrated that the proposed fast spin echo method can achieve good visualization of the brachytherapy seeds in positive contrast and in different orientations. It is also capable of correctly differentiating brachytherapy seeds from other similar structures on conventional magnitude images.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/12052]
专题	深圳先进技术研究院_医工所
作者单位	PHYSICS IN MEDICINE AND BIOLOGY
推荐引用方式 GB/T 7714	Shi, Caiyun,Zhang, Yongqin,Zhang, Xiaoyong,et al. Accelerated susceptibility-based positive contrast imaging of MR compatible metallic devices based on modified fast spin echo sequences.[J]. PHYSICS IN MEDICINE AND BIOLOGY,2017.
APA	Shi, Caiyun.,Zhang, Yongqin.,Zhang, Xiaoyong.,Chen, Min.,Su, Shi.,...&Xie, Guoxi.(2017).Accelerated susceptibility-based positive contrast imaging of MR compatible metallic devices based on modified fast spin echo sequences..PHYSICS IN MEDICINE AND BIOLOGY.
MLA	Shi, Caiyun,et al."Accelerated susceptibility-based positive contrast imaging of MR compatible metallic devices based on modified fast spin echo sequences.".PHYSICS IN MEDICINE AND BIOLOGY (2017).