应用限制球形卷积解析弓状束的结构特性与语言理解表现的相关性

doi:10.11938/cjmr20160209

波谱学杂志 ›› 2016, Vol. 33 ›› Issue (2): 269-280.doi: 10.11938/cjmr20160209

所属专题：虚拟专刊：MRI方法与应用

应用限制球形卷积解析弓状束的结构特性与语言理解表现的相关性

高雯菁¹, 李锵¹, 陈品元², 杜振丰³, 赵一平^4,5

1. 天津大学电子信息工程学院, 天津 300000;
2. 林口长庚纪念医院脑神经外科系, 台湾桃园 33305;
3. 林口长庚纪念医院影像诊疗科部, 台湾桃园 33305;
4. 长庚大学医疗机电工程研究所, 台湾桃园 33302;
5. 林口长庚纪念医院脑神经内科系, 台湾桃园 33305

收稿日期:2015-05-28 修回日期:2016-04-10 出版日期:2016-06-05 在线发表日期:2016-06-05
通讯作者: 赵一平,电话:+886-3-2118800#5469,E-mail:yiping@mail.cgu.edu.tw. E-mail:yiping@mail.cgu.edu.tw
作者简介:高雯菁(1991-),女,山西大同人,硕士研究生,信息与通信工程专业.
基金资助:
长庚大学研究计划资助项目(UERPD2D0081);长庚大学健康老化研究中心资助项目(CMRPD1B0332);长庚医院相对辅助款(BMRPC78).

Correlation Between Structural Characteristics of Arcuate Fasciculus and Performances of Language Comprehension Revealed by Diffusion Imaging Based Tractography

GAO Wen-jing¹, LI Qiang¹, CHEN Pin-yuan², TOH Cheng-hong³, CHAO Yi-ping^4,5

1. School of Electronic Information Engineering, Tianjin University, Tianjin 300000, China;
2. Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, China;
3. Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, China;
4. Graduate Institute of Medical Mechatronics, Chang Gung University, Taoyuan 33302, China;
5. Department of Neurology, Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, China

Received:2015-05-28 Revised:2016-04-10 Published:2016-06-05 Online:2016-06-05

摘要/Abstract

摘要：

通过限制球形卷积(constrained spherical deconvolution,CSD)和神经纤维追踪技术(tractography),以了解大脑左右半球的弓状束(arcuate fasciculus,AF)神经结构完整性与语言理解能力的相关性.该文使用磁共振成像(MRI)仪对14例大脑左半球罹患肿瘤的右利手患者进行了术前术后扫描(每次扫描均伴随一次波士顿失语症测试),并用分析软件DSI Studio计算术前术后左右半球弓状束的四项扩散指标,并进行了比较.结果发现左脑弓状束有两项指标在术前术后有非常显著的差异(p<0.01),而右脑四项指标均无显著改变(p>0.05).另外,该文还将扩散指标与患者相对应的语言测试所反映的语言理解能力进行了相关性分析,发现无论术前术后,左半球弓状束与语言理解能力相关系数r介于0.6~0.8之间,而右半球则仅介于0.3~0.4之间.上述结果表明,语言理解能力与左侧弓状束密切相关(p<0.01),而与右侧弓状束相关性不大,此结果与以往研究者对大脑侧化的认知相符.

关键词: 扩散磁共振成像(dMRI), 限制球形卷积算法(CSD), 语言理解能力, 神经纤维追踪技术

Abstract:

In this study, we aimed to study the relationship between structural characteristics of the arcuate fasciculus (AF) derived from diffusion MRI and the performance of language comprehension. Constrained spherical deconvolution and tractography were used to analyze the diffusion MRI data. A total of 14 right-handed subjects with brain tumors in the left-hemisphere were recruited. Two MRI scan which one before the tumor-removing brain surgery and the other after the surgery were performed. In each scan, a short version of Boston diagnostic aphasia Examination (BDAE) test was applied to evaluate the performance of language comprehension. Four averaged diffusion indices along bilateral AF reconstructed by tractography were extrocted. The results showed that FA and RD in the left AF changed significantly (p<0.01) after the surgery, but similar changes were not found in the right AF. Diffusion indices of the left AF tract showed significantly higher (p<0.01) correlation with the BDAE results (r=0.6~0.8), relative to the right AF (r=0.3~0.4). The findings are consistent with previous reports concerning the functional lateralization of the AF.

Key words: diffusion magnetic resonance imaging (dMRI), constrained spherical deconvolution (CSD), language comprehension, tractography

中图分类号:

高雯菁, 李锵, 陈品元, 杜振丰, 赵一平. 应用限制球形卷积解析弓状束的结构特性与语言理解表现的相关性[J]. 波谱学杂志, 2016, 33(2): 269-280.

GAO Wen-jing, LI Qiang, CHEN Pin-yuan, TOH Cheng-hong, CHAO Yi-ping. Correlation Between Structural Characteristics of Arcuate Fasciculus and Performances of Language Comprehension Revealed by Diffusion Imaging Based Tractography[J]. Chinese Journal of Magnetic Resonance, 2016, 33(2): 269-280.

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应用限制球形卷积解析弓状束的结构特性与语言理解表现的相关性

Correlation Between Structural Characteristics of Arcuate Fasciculus and Performances of Language Comprehension Revealed by Diffusion Imaging Based Tractography

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