Reproducibility of normal hepatic proton MRS at 3.0T
10.3321/j.issn:1003-3289.2009.10.025
- VernacularTitle:正常肝脏3.0T质子MRS检查的可重复性
- Author:
Li XU
;
Changhong LIANG
;
Yuanqiu XIAO
;
Zhonglin ZHANG
;
Shuixing ZHANG
;
Shufei XIE
- Publication Type:Journal Article
- Keywords:
Liver;
Magnetic resonance spectroscopy;
Reproducibility
- From:
Chinese Journal of Medical Imaging Technology
2009;25(10):1821-1823
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the reproducibility of normal hepatic MRS at 3.0T. Methods The hepatic proton MRS was performed with GE Signa Excite HD 3.0T system and eight-channel torso phased-array coils using PRESS sequence. Thirty-one healthy individuals were enrolled in this study. Liver spectra were collected with TR of 1500 ms, TE of 30 ms, ROI of 2 cm×2 cm×2 cm, NSA of 64 times. The outcomes were statistically analyzed with Wilcoxon signed ranks test and Spearman correlation test.Results There was no significant difference of signal to noise ratio (Z=-0.535,P=0.593), baseline stability (Z=-0.333, P=0.739), linewidth of automatic shimming (Z=-0.305, P=0.761), water suppression (Z=-1.232, P=0.218), height of lipid peak (Z=-0.558,P=0.557), area under the lipid peak (Z=-1.195,P=0.232), height of water peak (Z=-0.647,P=0.518) and area under the warter peak (Z=-0.118, P=0.906) between first examination and second examination. Correlation coefficient of the former and the later measurements of lipid area and water area were 0.784 (P<0.001) and 0.799 (P<0.001), respectively.Conclusion The reproducibility is good for in vivo liver proton MRS at 3.0T.
