CAJ | 학술논문

目的探讨质子MRS检查正常肝脏同一感兴趣区(ROI)的可重复性.方法对31名正常志愿者,采用GE Signa Excite HD 3.0T 超导磁共振扫描仪,8通道相控阵线圈,单体素PRESS序列.采集参数为TR/TE:1500 ms/30 ms,NSA:64次,ROI:2 cm×2 cm×2 cm.对预扫描匀场效果和抑水效果、SNR和基线稳定性、水峰和脂质峰两次重复测量及水峰、脂质峰测量结果间的相关性行统计学分析.结果相同部位两次MRS检查得波谱SNR(Z=-0.535, P=0.593)、基线稳定性(Z=-0.333, P=0.739)、自动匀场线宽(Z=-0.305, P=0.761)、抑水(Z=-1.232, P=0.218)、脂质峰高度(Z=-0.558, P=0.557)、脂质峰峰下面积(Z=-1.195, P=0.232)、水峰高度(Z=-0.647, P=0.518)、水峰峰下面积(Z=-0.118, P=0.906)差异均无统计学意义.前后两次脂质峰面积、水峰面积相关系数分别为0.784(P<0.001)和0.799(P<0.001).结论在体质子MRS单体素PRESS序列采集具有可重复性.
목적 탐토질자MRS검사정상간장동일감흥취구(ROI)적가중복성.방법 대31명정상지원자,채용GE Signa Excite HD 3.0T 초도자공진소묘의,8통도상공진선권,단체소PRESS서렬.채집삼수위TR/TE:1500 ms/30 ms,NSA:64차,ROI:2 cm×2 cm×2 cm.대예소묘균장효과화억수효과、SNR화기선은정성、수봉화지질봉량차중복측량급수봉、지질봉측량결과간적상관성행통계학분석.결과 상동부위량차MRS검사득파보SNR(Z=-0.535, P=0.593)、기선은정성(Z=-0.333, P=0.739)、자동균장선관(Z=-0.305, P=0.761)、억수(Z=-1.232, P=0.218)、지질봉고도(Z=-0.558, P=0.557)、지질봉봉하면적(Z=-1.195, P=0.232)、수봉고도(Z=-0.647, P=0.518)、수봉봉하면적(Z=-0.118, P=0.906)차이균무통계학의의.전후량차지질봉면적、수봉면적상관계수분별위0.784(P<0.001)화0.799(P<0.001).결론 재체질자MRS단체소PRESS서렬채집구유가중복성.
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.