对比以不同方法分割ROI后弥散张量成像重建咬肌结果  

Analysis of diffusion tensor imaging reconstruction results ofmasseter muscles with different ROI

作　　者：林香 郭伟[1,2] 苏妍 戴鸿鹏 曹代荣[1,2] LIN Xiang;GUO Wei;SU Yan;DAI Hongpeng;CAO Dairong(Department of Radiology,the First Affiliated Hospital of Fujian Medical University,Fuzhou 350005,China;Department of Radiology,National Regional Medical Center,Binhai Campus of the First Affiliated Hospital,Fujian Medical University,Fuzhou 350212,China)

机构地区：[1]福建医科大学附属第一医院医学影像科,福建福州350005 [2]福建医科大学附属第一医院滨海院区,国家区域医疗中心医学影像科,福建福州350212

出　　处：《中国医学影像技术》2024年第4期603-608,共6页Chinese Journal of Medical Imaging Technology

基　　金：福建医科大学启航基金(2022QH1101)。

摘　　要：目的 观察不同方法分割ROI后行弥散张量成像(DTI)重建咬肌结果的可重复性及其差异,以及不同咀嚼习惯侧别之间DTI重建咬肌结果的差异。方法 前瞻性纳入25名健康成人,分别基于单层ROI(ROI-1)、三层ROI(ROI-3)及肌肉整体即感兴趣容积(VOI)对咬肌行DTI重建,评估重建DTI结果的观察者内及观察者间可重复性、组间差异、组间相关性及其与脂肪分数(FF)的相关性,分析不同咀嚼习惯侧别间咬肌DTI重建结果的差异。结果 基于ROI-1、ROI-3及VOI以DTI重建咬肌结果可重复性均高(ICC均>0.90)。不同ROI之间,所获纤维束数目(FTN)、纤维束平均长度(MFTL)、纤维束体积(FTV)、平均弥散系数(MD)、轴向弥散系数(AD)及径向弥散系数(RD)差异均有统计学意义(校正P<0.05)。基于以上3种ROI所获DTI结果之间呈正相关(r=0.739~0.994,P均<0.05);其FTN、FTV、MD、RD均与FF呈负相关(r=-0.628~-0.284,P均<0.05)。以各ROI获取的非习惯咀嚼侧咬肌MFTL均短于平衡咀嚼咬肌(P均<0.05)。结论 以不同方法分割ROI所获DTI重建咬肌结果之间存在明显差异及一定相关性,且可重复性高;3种方式均可用于显示非习惯咀嚼侧咬肌纤维束长度改变。Objective To observe the reproducibility and difference of reconstruction results of diffusion tensor imaging(DTI)of masseter muscles with different methods to draw ROI,as well as the difference in DTI reconstruction results of masseter muscles under different chewing side performances.Methods Twenty-five healthy adults were prospectively enrolled,and DTI of masseter muscles were reconstructed based on single-layer ROI(ROI-1),three-layer ROI(ROI-3)or whole muscle volume,i.e.volume of interest(VOI),respectively.Intra-observer and inter-observer reproducibility,intergroup differences and intergroup correlations,as well as correlations with fat fraction(FF)of DTI reconstruction results with different ROI were evaluated.The difference of DTI reconstruction results of masseter muscles with different chewing side performances were analyzed.Results DTI reconstruction results of masseter muscles based on ROI-1,ROI-3 or VOI were all highly reproducible(all ICC>0.90).The fiber track number(FTN),mean fiber track length(MFTL),fiber track volume(FTV),mean diffusivity(MD),axial diffusivity(AD)and radial diffusivity(RD)significant different with different ROI(adjusted P<0.05),whereas positive correlations of DTI results were found with 3 different ROI(r=0.739—0.994,all P<0.05).FTN,FTV,MD,and RD with different ROI were all negatively correlated with FF(r=-0.628—-0.284,all P<0.05).MFTL of the non-habitual chewing masseter muscles with various ROI were shorter than that of balanced chewing performance masseter muscles(all P<0.05).Conclusion DTI reconstruction results of masseter muscles with different ROI were significantly different but also correlated and with high reproducibility.All 3 ROI could be used to show changes of the altered fiber track length of non-habitual chewing masseter muscles.

关 键 词：咬肌 弥散张量成像 可重复性 结果 前瞻性研究 

分 类 号：R322.74[医药卫生—人体解剖和组织胚胎学] R445.2[医药卫生—基础医学]