Constant-variable flip angles for hyperpolarized media MRI
文献类型：期刊论文
| 作者 | Deng, He1,2; Zhong, Jianping1; Ruan, Weiwei1; Chen, Xian1; Sun, Xianping1; Ye, Chaohui1; Liu, Maili1; Zhou, Xin1 |
| 刊名 | JOURNAL OF MAGNETIC RESONANCE
 |
| 出版日期 | 2016-02-01 |
| 卷号 | 263页码:92-100 |
| 关键词 | Hyperpolarized MRI Constant flip angles Constant-variable flip angles Variable flip angles |
| 英文摘要 | The longitudinal magnetization of hyperpolarized media, such as hyperpolarized Xe-129, He-3, etc., is nonrenewable. When the MRI data acquisition begins at the k-domain center, a constant flip angle (CFA) results in an image of high signal-to-noise ratio (SNR) but sacrifices the accuracy of spatial information. On the other hand, a variable flip angle (VFA) strategy results in high accuracy but suffers from a low SNR. In this paper, we propose a novel scheme to optimize both the SNR and accuracy, called constant-variable flip angles (CVFA). The proposed scheme suggests that hyperpolarized magnetic resonance signals are firstly acquired through a train of n* CFA excitation pulses, followed by a train of N-n* VFA excitation pulses. We simulate and optimize the flip angle used in the CFA section, the number of CFA excitation pulses, the number of VFA excitation pulses, and the initial and final variable flip angles adopted in the VFA section. Phantom and in vivo experiments demonstrate the good performance of the CVFA designs and their ability to maintain both high SNR and spatial resolution. (C) 2016 Elsevier Inc. All rights reserved. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences ; Technology |
| 类目[WOS] | Biochemical Research Methods ; Physics, Atomic, Molecular & Chemical ; Spectroscopy |
| 研究领域[WOS] | Biochemistry & Molecular Biology ; Physics ; Spectroscopy |
| 关键词[WOS] | NOBLE-GAS MRI ; INDUCED POLARIZATION ; PARA-HYDROGEN ; LUNG ; ACQUISITION ; XE-129 ; NMR |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000370891700010 |
| 公开日期 | 2016-05-31 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/9234]  |
| 专题 | 武汉物理与数学研究所_磁共振基础研究部 |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Natl Ctr Magnet Resonance Wuhan, Wuhan 430071, Peoples R China 2.Cent China Normal Univ, Dept Informat Technol, Wuhan 430079, Peoples R China |
| 推荐引用方式 GB/T 7714 | Deng, He,Zhong, Jianping,Ruan, Weiwei,et al. Constant-variable flip angles for hyperpolarized media MRI[J]. JOURNAL OF MAGNETIC RESONANCE,2016,263:92-100. |
| APA | Deng, He.,Zhong, Jianping.,Ruan, Weiwei.,Chen, Xian.,Sun, Xianping.,...&Zhou, Xin.(2016).Constant-variable flip angles for hyperpolarized media MRI.JOURNAL OF MAGNETIC RESONANCE,263,92-100. |
| MLA | Deng, He,et al."Constant-variable flip angles for hyperpolarized media MRI".JOURNAL OF MAGNETIC RESONANCE 263(2016):92-100. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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