额颞叶变性亚型与阿尔茨海默病的脑灰质萎缩模式的结构MRI研究

被引:7
作者
张冰 [1 ]
张鑫 [1 ]
李茗 [1 ]
陈飞 [2 ]
徐俊 [3 ]
王慧婷 [4 ]
钱来 [2 ]
赵辉 [2 ]
徐运 [2 ]
朱斌 [1 ]
机构
[1] 南京大学医学院附属鼓楼医院放射科
[2] 南京大学医学院附属鼓楼医院神经内科
[3] 南京脑科医院神经内科
[4] 南京卫生学校
关键词
痴呆; 失语,原发进行性; 阿尔茨海默病; 磁共振成像; 对比研究;
D O I
暂无
中图分类号
R749.16 [];
学科分类号
摘要
目的比较分析额颞叶变性(FTLD)的两个亚型,即行为变异型额颞叶痴呆(bvFTD)和原发性进行性失语(PPA),与阿尔茨海默病(AD)的脑灰质萎缩模式,为早期诊断和鉴别诊断提供客观的支持依据。方法选取FTLD患者23例(bvFTD 10例,PPA 13例)、AD患者30例及认知正常受试者(CN)30名,使用3.0T超导型MR仪及8通道头线圈行图像采集。以高分辨率的三维梯度回波序列(3D-TFE)横断面T1WI作为脑灰质皮层体积的计算序列,采用统计参数图(SPM)8和其工具箱[基于体素的形态测量学方法(VBM)]对3D-TFE T1WI图像进行空间标准化预处理,最后得到灰质分割图像,进行灰质体积的统计分析,多重比较矫正采用假发现率法,用Xjview工具显示统计分析结果,体素簇大小设为5。采用4 mm的半高全宽高斯核进行空间平滑。统计学分析采用配对t检验。结果与CN组比较,在bvFTD、PPA和AD组中均出现大脑皮层及皮质下结构(如海马、杏仁核、尾状核等)体积弥漫减少。在bvFTD和PPA组中最明显的萎缩脑区位于额颞叶。与AD组比较,bvFTD组灰质明显萎缩的脑区包括:两侧颞叶上中下回、颞极上回及中回、右侧梭状回和两侧额叶上中下回。颞叶和额叶萎缩具有明显的右侧偏侧性,右侧和左侧颞叶萎缩体素的总体数目为14 301个和5105个(t=-5.03,P<0.05),右侧和左侧额叶萎缩体素的数目为1344个和125个(t=3.45,P<0.05),差异均有统计学意义。在PPA组中左侧颞枕叶萎缩明显大于右侧(t=-2.65,P<0.05),左侧和右侧颞枕叶萎缩体素的数目为15 637个和10 723个。结论 bvFTD、PPA与AD 3组具有不同的脑灰质萎缩模式。其中,bvFTD具有右侧额叶和颞叶萎缩的非对称分布特点,与性格改变的特征性表现相关;而PPA具有左侧颞枕叶非对称性萎缩的特点,可解释PPA患者出现语言障碍的特点。
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