Referenceless PRFS MR-Thermometry Using partial separability model

	Referenceless PRFS MR-Thermometry Using partial separability model
	Caiyun Shi; Guoxi Xie; Yibiao Song; Chao Zou; Xin Liu; Shanxue Zhou
刊名	APPLIED MAGNETIC RESONANCE
	2014
英文摘要	Many areas of magnetic resonance (MR)-guided thermal therapy research would benefit from temperature maps with high spatial and temporal resolution. Conventional thermometry relies on the subtraction of baseline images, which makes it sensitive to tissue motion and frequency drift during the course of treatment. For another case is the limit of magnetic resonance imaging sampling speed, it is hard to accurately achieve MR thermometry with high spatiotemporal resolution especially for dynamic organs. To address these issues, a novel method for MR thermometry is presented by exploiting the data redundancy based on partial separability (PS) model and the referenceless thermometry. The PS model highly sparse sample two datasets in the (k-t) space for image reconstruction, which respectively determine the spatial and temporal resolutions. After the phase information is extracted from the images reconstructed by the PS model, the background phase outside the heated region from each acquired phase image through a polynomial fitting is estimated. Extrapolation of the polynomial to the heated region serves as the background phase estimate, which is then subtracted from the actual phase. The thermometry results showed that this method could accurately capture the dynamic change of MR thermometric images with 1.5 mm x 1.5 mm spatial resolution and 250 ms temporal resolution, respectively. The in vivo experiment of MR-guided high intensity focused ultrasound research and the cardiac dynamic MR thermometry are shown to demonstrate the benefits of the proposed method in high spatiotemporal resolution MR thermometry.
收录类别	SCI
原文出处	http://link.springer.com/article/10.1007%2Fs00723-013-0505-3
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/5755]
专题	深圳先进技术研究院_医工所
作者单位	APPLIED MAGNETIC RESONANCE
推荐引用方式 GB/T 7714	Caiyun Shi,Guoxi Xie,Yibiao Song,et al. Referenceless PRFS MR-Thermometry Using partial separability model[J]. APPLIED MAGNETIC RESONANCE,2014.
APA	Caiyun Shi,Guoxi Xie,Yibiao Song,Chao Zou,Xin Liu,&Shanxue Zhou.(2014).Referenceless PRFS MR-Thermometry Using partial separability model.APPLIED MAGNETIC RESONANCE.
MLA	Caiyun Shi,et al."Referenceless PRFS MR-Thermometry Using partial separability model".APPLIED MAGNETIC RESONANCE (2014).