一种基于复数主成分分析的磁共振波谱量化预处理方法

曾卫明; 梁晓云; 罗立民

一种基于复数主成分分析的磁共振波谱量化预处理方法

计量
- 文章访问数: 2383
- HTML全文浏览量: 102
- PDF下载量: 918
- 被引次数: 0
出版历程
- 收稿日期: 2003-08-01
- 修回日期: 2004-07-05
- 刊出日期: 2005-01-19

A Preprocessing Method for Quantitation of Magnetic Resonance Spectroscopy Based on Complex Principal Component Analysis

摘要

摘要: 该文提出了一种应用复数主成分分析方法(CPCA)来获取波谱基木波型,自动校正频率和衰减系数偏移的方法。该方法首先对频率进行校正,然后拓宽CPCA的应用范围,把它使用到衰减系数偏移校正领域。文中的实现结果证明:该方法较好地实现了频率和衰减系数的校正,在同实域PCA方法性能比较上,前者的计算速度和估计精度明显占优。
- 复数主成分分析; 磁共振波谱; 频率校正; 衰减系数校正
Abstract: This paper proposes a method that can automatically obtain common lineshape in the spectrum data set based on Complex Principal Component Analysis(CPCA). which can correct frequency shifts and damping factor shifts effectively. This method aligns frequency at first, then extends CPCA to the correction of damping factor shifts in a single resonant peak across spectra. Through this method, frequency and damping factor alignment are successfully achieved. In terms of computation time and estimation precision this method is significantly better than that of PCA.

HTML全文

参考文献(1)

Lenkinski R E. MR spectroscopy :Clinical tool or research probe?(Revisited)[J].Academic Radiology.2001, 8(7):567-[2]Lens P N L, Hemminga M A. Nuclear magnetic resonance in environmental engineering: Principles and applications[J].Biodegradation.1998, 9(6):393-[3]Mierisova S M R. Spectroscopy quantitation: a review of frequency domain methods. NMR in Biomedicine. 2001, 14(4):247 - 259.[4]Chen H, Van Huffel S, Vandewalle J. Improved methods for exponential parameter estimation in the presence of known poles and noise[J].IEEE Trans. on Signal Processing.1997, 45(5):1390-[5]Vanhamme L, Van Huffel S, Van Hecke P, Van Ormondt D.Time-domain quantification of series of biomedical magnetic resonance spectroscopy signals. Journal of Magnetic Resonance 1999, 140(1): 120- 130.[6]Stoyanova R, Kuesel A C, Brown T R. Application of principalcomponent analysis for NMR spectral quantitation[J].Journal of Magnetic Resonance, Series A.1995, 115(2):265-[7]Brown T R, Stoyanova R. NMR spectral quantitation by principal component analysis. Ⅱ determination of frequency and phase shifts. Journal of Magnetic Resonance, Series B, 1996, 112(1):32 - 43.[8]Witjes H, Melssen W J, int Zandt H J A, van der Graaf M,Heerschap A, Buydens L M C. Automatic correction for phase shifts, frequency shifts, and lineshape distortions across a series of single resonance lines in large spectral data sets[J].Journal of Magnetic Resonance.2000, 144(1):35-[9]Witjes H, Pepers M, Melssen W J, Buydens L M C. Modelling phase shifts, peak shifts and peak width variations in spectral data sets: its value in multivariate data analysis, Analytica Chimica Acta, 2001, 432(1): 113 - 124.[10]Stoyanova R, Brown T R. NMR spectral quantitation by principal component analysis. A generalized procedure for determination of lineshape variations. Journal of Magnetic Resonance, 2002,154 (2): 163- 175.[11]Elliott M A, Walter Glenn A, Swift A, Vandenborne K, Schotland J C, Leigh J S. Spectral quantitation by principal component analysis using complex singular value decomposition[J].Magnetic Resonance in Medicine.1999, 41(3):450-3.0.CO;2-9' target='_blank'>[12]Van Huffel S, Wang Y, Vanhamme L, Van Hecke P. Automatic frequency alignment and quantitation of single resonances in multiple magnetic resonance spectra via complex principal component analysis[J].Journal of Magnetic Resonance.2002, 158(1):1-[13]Vanhamme L, Fierro R D, Van Huffel S, de Beer R. Fast removal of residual water in proton spectra, Journal of Magnetic Resonance, 1998, 132(2): 197 -203.

施引文献

资源附件(0)

访问统计