A new gradient shimming method based on undistorted field map of B-0 inhomogeneity
文献类型：期刊论文
| 作者 | Bao, Qingjia1; Chen, Fang1; Chen, Li1; Song, Kan1,2; Liu, Zao1,2; Liu, Chaoyang1 |
| 刊名 | JOURNAL OF MAGNETIC RESONANCE
 |
| 出版日期 | 2016-04-01 |
| 卷号 | 265页码:25-32 |
| 关键词 | NMR spectrometer Automatic shimming Gradient shimming High resolution spectra B-0 inhomogeneity Field mapping |
| 英文摘要 | Most existing gradient shimming methods for NMR spectrometers estimate field maps that resolve B-0 inhomogeneity spatially from dual gradient-echo (GRE) images acquired at different echo times. However, the distortions induced by B-0 inhomogeneity that always exists in the GRE images can result in estimated field maps that are distorted in both geometry and intensity, leading to inaccurate shimming. This work proposes a new gradient shimming method based on undistorted field map of B-0 inhomogeneity obtained by a more accurate field map estimation technique. Compared to the traditional field map estimation method, this new method exploits both the positive and negative polarities of the frequency encoded gradients to eliminate the distortions caused by B-0 inhomogeneity in the field map. Next, the corresponding automatic post-data procedure is introduced to obtain undistorted B-0 field map based on knowledge of the invariant characteristics of the B-0 inhomogeneity and the variant polarity of the encoded gradient. The experimental results on both simulated and real gradient shimming tests demonstrate the high performance of this new method. (C) 2015 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] | NORMAL SPECTROMETER HARDWARE ; IN-VIVO ; PHASE ; RECONSTRUCTION ; OPTIMIZATION ; ACQUISITION ; HOMOGENEITY ; IMAGES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000374513600004 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/9351]  |
| 专题 | 武汉物理与数学研究所_高技术创新与发展中心 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Magnet Resonance & Atom Mol Phys, Key Lab Magnet Resonance Biol Syst, Wuhan Ctr Magnet Resonance,Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bao, Qingjia,Chen, Fang,Chen, Li,et al. A new gradient shimming method based on undistorted field map of B-0 inhomogeneity[J]. JOURNAL OF MAGNETIC RESONANCE,2016,265:25-32. |
| APA | Bao, Qingjia,Chen, Fang,Chen, Li,Song, Kan,Liu, Zao,&Liu, Chaoyang.(2016).A new gradient shimming method based on undistorted field map of B-0 inhomogeneity.JOURNAL OF MAGNETIC RESONANCE,265,25-32. |
| MLA | Bao, Qingjia,et al."A new gradient shimming method based on undistorted field map of B-0 inhomogeneity".JOURNAL OF MAGNETIC RESONANCE 265(2016):25-32. |
入库方式： OAI收割
来源：武汉物理与数学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。