FAST CALCULATION METHOD OF AVERAGE G-FACTOR FOR WAVE-CAIPI IMAGING

被引：0

作者：

Wang, Haifeng ^{[1
]}

Qiu, Zhilang ^{[1
,2
]}

Su, Shi ^{[1
]}

Ying, Leslie ^{[3
,4
]}

Liang, Dong ^{[1
]}

机构：

[1] Chinese Acad Sci, Shenzhen Inst Adv Technol, Paul C Lauterbur Res Ctr Biomed Imaging, Shenzhen 518055, Guangdong, Peoples R China

[2] Univ Chinese Acad Sci, Shenzhen Coll Adv Technol, Shenzhen 518055, Guangdong, Peoples R China

[3] Univ Buffalo State Univ New York, Dept Biomed Engn, Buffalo, NY 14260 USA

[4] Univ Buffalo State Univ New York, Dept Elect Engn, Buffalo, NY 14260 USA

来源：

2019 IEEE 16TH INTERNATIONAL SYMPOSIUM ON BIOMEDICAL IMAGING (ISBI 2019) | 2019年

基金：

中国国家自然科学基金;

关键词：

MRI; parallel imaging; Wave-CAIPI; g-factor penalty; PARALLEL; RECONSTRUCTION;

D O I：

10.1109/isbi.2019.8759562

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Wave-CAIPI MR imaging is a 3D imaging technique which can uniformize the g-factor maps and significantly reduce g-factor penalty at high acceleration factors. But it is time-consuming to calculate the average g-factor penalty for optimizing the parameters of Wave-CAIPI. In this paper, we propose a novel fast calculation method to calculate the average g-factor in Wave-CAIPI imaging. Wherein, the g-factor value in the arbitrary (e.g. the central) position is separately calculated and then approximated to the average g-factor using Taylor linear approximation. The verification experiments have demonstrated that the average g-factors of Wave-CAIPI imaging which are calculated by the proposed method is consistent with the previous time-consuming theoretical calculation method and the conventional pseudo multiple replica method. Comparison experiments show that the proposed method is averagely about 1000 times faster than the previous theoretical calculation method and about 1700 times faster than the conventional pseudo multiple replica method.

引用

页码：1656 / 1659

页数：4

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