Uchiyama T, Minamitani H, Ichimori K, Nakazawa H, Oki H
Institute of Biomedical Engineering, Faculty of Science and Technology, Keio University, Kanagawa, Japan.
Tokai J Exp Clin Med. 1991 Dec;16(5-6):231-8.
The linear prediction z-transform method (LPZAR) was applied to estimate 31P NMR spectra of perfused rat hearts. The spectra obtained by the LPZAR method showed sharper peaks with less noise for phosphate concentrations than those obtained by conventional fast Fourier transform. The LPZAR method provided a better estimation of intracellular phosphate concentrations in short acquisition time experiments in which condition Fourier transform spectra are not suitable for the quantification due to the poor resolution of FFT spectra. Utilizing the LPZAR method, rapid changes in phosphoric metabolites of the heart can be monitored during ischemia followed by reperfusion.
线性预测Z变换方法（LPZAR）被用于估计灌注大鼠心脏的31P NMR谱。与传统快速傅里叶变换获得的谱相比，LPZAR方法获得的谱在磷酸盐浓度方面显示出更尖锐的峰且噪声更少。在短采集时间实验中，当傅里叶变换谱由于快速傅里叶变换谱分辨率差而不适用于定量时，LPZAR方法能更好地估计细胞内磷酸盐浓度。利用LPZAR方法，可以在缺血再灌注过程中监测心脏磷酸代谢物的快速变化。
