White matter degeneration in diffuse axonal injury and mild traumatic brain injury observed with automatic tractography

被引:3
|
作者
Ueda, Ryo [1 ]
Hara, Hiroyoshi [2 ]
Hata, Junichi [3 ]
Senoo, Atsushi [4 ]
机构
[1] Keio Univ Hosp, Off Radiat Technol, Tokyo, Japan
[2] Ainomiyako Neurosurg Hosp, Neurorehabil Ctr, Osaka, Japan
[3] Jikei Univ, Div Regenerat Med, Grad Sch Med, Tokyo, Japan
[4] Tokyo Metropolitan Univ, Grad Sch Human Hlth Sci, Dept Radiol Sci, Tokyo, Japan
关键词
diffuse axonal injury; diffusion tensor imaging; focal axonal injury; mild traumatic brain injury; TRACULA;
D O I
10.1097/WNR.0000000000001688
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
A better understanding of white matter tract damage in patients with diffuse axonal injury (DAI) and mild traumatic brain injury (MTBI) is important to obtain an objective basis for sequelae. The purpose of this study was to clarify the characteristics of white matter tract degeneration in DAI and MTBI using automated tractography. T1-weighted and diffusion tensor imaging (DTI) was performed on seven DAI and seven MTBI patients as well as on nine healthy subjects. Automated probabilistic tractography analysis was performed using FreeSurfer and TRACULA (tracts constrained by underlying anatomy) for the reconstruction of major nerve fibers. We investigated the difference between DTI quantitative values in each white matter nerve fiber between groups and attempted to evaluate the classification accuracy of DAI and MTBI using receiver operator curve analysis. Both DAI and MTBI appeared to exhibit axonal degeneration along the nerve fiber tract in a scattered manner. The mean diffusivity of the ampulla of the corpus callosum was significantly higher in DAI than that in MTBI patients, suggesting axonal degeneration of the corpus callosum in DAI patients. Using mean diffusivity of the right cingulum-angular bundle, DAI and MTBI could be discriminated with an area under the curve of 94%. Both DAI and MTBI exhibited scattered axonal degeneration; however, DAI appeared to exhibit more pronounced axonal degeneration in the ampulla of the corpus callosum than MTBI. Our results suggest that DAI and MTBI can be accurately distinguished using DTI.
引用
收藏
页码:936 / 941
页数:6
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