脑室周围白质软化症合并脑瘫患儿的扩散张量成像参量与粗大运动功能评分的相关性研究  被引量:11

Correlation between diffusion tensor imaging parameters and classification of gross motor function in infants of periventricular leucomalacia with cerebral palsy

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作  者:蒋昊翔[1] 孙亲利[2] 李贤军[3] 张育苗[2] 李彦彦[2] 宋旸[4] 刘黎明[4] 张增俊[5] 杨健[2] 

机构地区:[1]西安市儿童医院影像科,710003 [2]西安交通大学医学院第一附属医院影像科,710061 [3]西安交通大学生命科学与技术学院生物医学工程系 [4]西安交通大学医学院第一附属医院儿保科,710061 [5]西安市儿童医院影像科

出  处:《中华放射学杂志》2014年第11期947-951,共5页Chinese Journal of Radiology

基  金:国家自然科学基金(81171317);教育部新世纪优秀人才支持计划(DWYXSJ11000007)

摘  要:目的 运用MR扩散张量成像(DTI)联合基于纤维束骨架的空间统计学(TBSS)技术,探讨脑室周围白质软化症(PVL)脑瘫患儿脑损伤部位,分析DTI参量与临床运动功能相关性.方法 前瞻性收集22例PVL合并脑瘫患儿(患儿组)与22例年龄、性别匹配的正常儿童(对照组)行常规MRI及DTI,应用粗大运动功能分级系统(GMFCS)评价患儿运动功能,其中GMFCS Ⅰ级5例、Ⅱ级5例、Ⅲ级3例、Ⅳ级7例、Ⅴ级2例.采用独立样本均数t检验比较患儿组和对照组脑白质不同部位各向异性分数(FA)、平行扩散率(AD)及垂直扩散率(RD)值的差异,Spearman相关分析患儿组不同白质纤维束DTI参量与GMFCS相关性.结果 与对照组相比,患儿组全脑白质FA值降低,其中皮质脊髓束(患儿组:左侧0.34±0.09,右侧0.34±0.06;对照组:左侧0.38±0.04,右侧0.37±0.04)、内囊后肢(患儿组:左侧0.53±0.09,右侧0.56±0.09;对照组:左侧0.62±0.04,右侧0.63±0.04)、内囊前肢(患儿组:左侧0.31±0.05,右侧0.32±0.05;对照组:左侧0.36±0.04,右侧0.38±0.04)、丘脑后辐射(患儿组:左侧0.32±0.07,右侧0.33±0.07;对照组:左侧0.40±0.02,右侧0.40±0.03)、上纵束(患儿组:左侧0.22±0.04,右侧0.24±0.05;对照组:左侧0.28±0.02,右侧0.28±0.02)、胼胝体膝部(患儿组:0.43±0.09;对照组:0.50±0.05)、胼胝体压部(患儿组:0.42±0.14;对照组:0.55±0.05)FA值在2组间差异均有统计学意义(t值为-5.044--2.216,P值均<0.05).RD值(双侧内囊前肢除外)增加(t值为2.176-3.766,P值均<0.05).AD值显著升高区域位于枕顶叶白质,主要累及双侧丘脑后辐射(左侧t=2.603,P=0.016;右侧t=2.263,P=0.034)及胼胝体压部(t=2.845,P=O.009).患儿组GMFCS与双侧皮质脊髓束、双侧内囊前后肢、双侧上纵束及胼胝体压部FA值呈负相关(r值为-0.723--0.462,P值均<0.05),GMFCS与双侧上纵束、右侧内囊后Objective To assess white matter (WM) injury regions in infants of periventricular leukomalacia (PVL) with cerebral palsy (CP) by using diffusion tensor imaging (DTI) analyzed with tract-based spatial statistics (TBSS),and to observe the correlation between DTI parameters and clinical motor function.Methods Twenty-two patients with PVL and CP and 22 normal infants matched in terms of age and gender underwent conventional magnetic resonance imaging (MRI) and DTI.The gross motor function classification system (GMFCS) was applied to evaluate motor function in patients with PVL.The distribution of GMFCS levels was as follows:level Ⅰ,5; level Ⅱ,5; level Ⅲ,3; level Ⅳ,7; and level V,2.Two-sample t-test was performed to compare the difference in the values of fractional anisotropy (FA),axial diffusivity (AD),and radial diffusivity (RD) in WM regions between patients group and controls group.Spearman relativity analysis was performed to assess correlation between DTI parameters in different WM fiber bundles and GMFCS in patients.Results In comparison to the control group,the WM FA values in the patient group decreased.There were significant differences between two groups in bilateral corticospinal tract (CST) (patients group:left 0.34 ±0.09,right 0.34±0.06; controls group:left 0.38 ± 0.04,right 0.37 ± 0.04); bilateral posterior limb internal capsule (PLIC)(patients group:left 0.53 ±.097,right 0.56±0.09;controls group:left 0.62 ± 0.04,right 0.63 ± 0.04); bilateral anterior limb internal capsule (ALIC) (patients group:left 0.31±0.05,right 0.32±0.05; controls group:left 0.36±0.04,right0.38±0.04); bilateral posterior thalamic radiation (PTR)(patients group:left 0.32±0.07,right 0.33±0.07; controls group:left 0.40±0.02,right 0.40±0.03); bilateral superior longitudinal fasciculus (SLF)(patients group:left 0.22±0.04,right 0.24± 0.05; controls group:left 0.28±0.02,right 0.28±0.02); genu of corpus callos

关 键 词:白质软化病 脑室周围 脑性瘫痪 磁共振成像 弥散 

分 类 号:R742.3[医药卫生—神经病学与精神病学] R445.2[医药卫生—临床医学]

 

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