全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

脉冲动态核极化增强的NMR和MRI系统研究Hot!

DOI: 10.11938/cjmr20150221, PP. 393-398

Keywords: 核磁共振(NMR),磁共振成像(MRI),脉冲动态核极化,控制台,PCIe

Full-Text   Cite this paper   Add to My Lib

Abstract:

该文介绍了一种自行设计和构建的可扩展脉冲动态核极化谱仪,可以实现核磁共振波谱与磁共振成像的功能.该仪器的新颖设计主要有:1)采用基于PCIe的分布式总线结构,能够极大地提高数据传输效率和通信可靠性,实现精确控制脉冲序列;2)采用外部高速的DDR芯片存储脉冲序列元素和FID数据,可以极大的提高脉冲序列的执行速度,减少快速成像序列的TR时间间隔;3)采用时钟移相技术,可以精确产生分辨率为纳秒级别的数字脉冲.最后对该仪器的动态核极化-磁共振波谱与核磁共振成像功能进行了实验验证.

References

[1]  Lynch K, O'Brien R. 1H Magnetic resonance spectroscopy: A review of the current literature and its potential utility in veterinary oncology[J]. Vet J, 2014, 200: 240-247.
[2]  Li H D, Zhang Z Y, Han Y Q, et al. Lung MRI Using Hyperpolarized Gases[J]. Chinese J Magn Reson, 2014, 31(3): 307-320
[3]  Overhauser A W. Polarization of nuclei in metals[J]. Phys Rev, 1953, 92: 411-415.
[4]  Gallagher Ferdia A, Kettunen Mikko I, Day Sam E, et al. Magnetic resonance imaging of pH in vivo using hyperpolarized 13C labelled bicarbonate[J]. Nature, 2008, 453: 940-944.
[5]  Golman K, Int Zandt R, Thaning M. Real-time metabolic imaging[J]. Proc Natl Acad Sci, 2006, 103(30): 11 270-11 275.
[6]  Kohler S J, Yen Y, Wolber J. In vivo 13C arbon metabolic imaging at 3 T with hyperpolarized 13C-1-pyruvate[J]. Magn Reson Med, 2007, 58: 65-69.
[7]  Su Y C, Andreas L, Griffin R G. Magic angle spinning NMR of proteins high frequency dynamic nuclear polarization and 1H detection[J]. Annu Rev Biochem, 2015, 84: 1-35.33.
[8]  Wang Y Q, Li C G, Pielal Gary J. In-cell protein magnetic resonance spectroscopy[J]. Chinese J Magn Reson, 2012, 29(4): 475-488.
[9]  Abragam A. Overhauser effect in nonmetals[J]. Phys Rev, 1955, 98: 1 729-1 735.
[10]  Borghini M. Spin-temperature model of nuclear dynamic polarization using free radicals[J]. Phys Rev Lett, 1968, 20: 419 -421.
[11]  Hwang C F, Hill D A. New effect in dynamic polarization[J]. Phys Rev Lett, 1967, 18: 110-112.
[12]  Farrar C T, Hall D A, Gerfen G J, et al. High-frequency dynamic nuclear polarization in the nuclear rotating frame[J]. J Magn Reson, 2000, 144: 134-141.
[13]  Henstra A, Dirksen P, Wenckebach W T. Enhanced dynamic nuclear polarization by the integrated solid effect[J]. Phys Rev A, 1988, 134: 134-136.
[14]  Henstra A, Wenckebach W T. The theory of nuclear orientation via electron spin locking (NOVEL)[J]. Mol Phys, 2008, 106: 859-871.
[15]  Weis V, Bennati M, Rosay M, et al. Solid effect in the electron spin dressed state—A new approach for dynamic nuclear polarization[J]. J Chem Phys, 2000, 113: 6 795-6 802.
[16]  Morley G W, van Tol Johan, Ardavan A, et al. Efficient dynamic nuclear polarization at high magnetic fields[J]. Phys Rev Lett, 2007, 98: 220501.

Full-Text

comments powered by Disqus

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133