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White matter connectivity damage secondary to hippocampal and amygdala target injuries in acute limbic encephalitis diffusion tensor image and voxel-based morphometry paired study

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Neural Regeneration Research 2009年第11期4卷 885-889页

作者： Ling Zou Wei Deng Hehan Tang Yi Wei Xiaoling Wen Zhengyan Li Weiwei Zhang QiangYuan Qiyong Gong Department of Radiology West China Hospital Sichuan University Chengdu 610041 Sichuan Province China Department of Psychiatry West China Hospital Sichuan University Chengdu 610041 Sichuan Province China Department of Neurology West China Hospital Sichuan University Chengdu 610041 Sichuan Province China

BACKGROUND： Limbic encephalitis is a rare syndrome that specifically affects the limbic system. Magnetic resonance imaging （MRI） has been typically used to detect brain changes in this disease. However, the mechanisms of limbic encephalitis-related white matter damage remain poorly understood. OBJECTIVE： To characterize white matter connectivity changes secondary to injuries of the limbic system in limbic encephalitis through combined application of diffusion tensor imaging （DTI） and voxel-based morphometry. DESIGN, TIME AND SETTING： A non-randomized, controlled, clinical, neuroimaging, DTI study was performed at the Department of Radiology, West China Hospital in December 2008. PARTICIPANTS： A male, 46-year-old, limbic encephalitis patient, as well as 11 age- and gender-matched healthy volunteers, were enrolled in the present study. METHODS： MRI was performed on the limbic encephalitis patient using a 3.0T MR scanner. Three-dimensional SPGR Tl-weighted images and DTI were acquired in the patient and controls. Data were analyzed using Matlab 7.0 and SPM2 software. MAIN OUTCOME MEASURES： Results from routine MRI scan with contrast enhancement of patient, as well as fractional anisotropy and mean diffusivity value map differences between patient and controls. RESULTS： Significant symmetric MRI signal intensity abnormalities were observed with routine MRI Affected bilateral hippocampi and amygdala exhibited hypointense signals in TIWI and hyperintense signals in T2 images. The DTI study revealed decreased fractional anisotropy values in the bilateral alveus and fimbria of the hippocampus, bilateral internal and external capsules, white matter of the right prefrontal area, and left corona radiate in the patient compared with normal controls （P 〈 0.001） Significantly increased fractional anisotropy, mean diffusivity, or decreased mean diffusivity were not observed in the patient, compared with controls. CONCLUSION： Secondary white matter damage to the hippocampal afveus

关键词： limbic encephalitis white matter connectivity diffusion tensor image magnetic resonance imaging

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A VARIATIONAL PROBLEM ARISING IN REGISTRATION OF diffusion tensor imageS

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Acta Mathematica Scientia 2017年第2期37卷 539-554页

作者：韩欢周焕松 Wuhan Insitute of Physics and Mathematics Chinese Academy of Sciences Department of Mathematics Wuhan University of Technology

The existence of a global minimizer for a variational problem arising in registration of diffusion tensor images is proved, which ensures that there is a regular spatial transformation for the registration of diffusio... 详细信息

关键词： Variational problem image matching registration diffusion tensor image

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Functional magnetic resonance imaging and diffusion tensor tractography of the corticopontocerebellar tract in the human brain

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Neural Regeneration Research 2011年第1期6卷 76-80页

作者： Ji Heon Hong Sung Ho Jang Department of Physical Medicine and Rehabilitation College of MedicineYeungnam University

The anatomical organization of the corticopontocerebellar tract （CPCT） in the human brain remains poorly understood. The present study investigated probabilistic tractography of the CPCT in the human brain using diffusion tensor tractography with functional magnetic resonance imaging. CPCT data was obtained from 14 healthy subjects. CPCT images were obtained from functional magnetic resonance imaging and diffusion tensor tractography, revealing that the CPCT originated from the primary sensorimotor cortex and descended to the pontine nucleus through the corona radiata, the posterior limb of the internal capsule, and the cerebral peduncle. After crossing the pons through the transverse pontine fibers, the CPCT entered the cerebellum via the middle cerebral peduncle. However, some variation was detected in the midbrain （middle cerebral peduncle and/or medial lemniscus） and pons （ventral and/or dorsal transverse pontine fibers）. The CPCT was analyzed in 3 dimensions from the cerebral cortex to the cerebellum. These results could be informative for future studies of motor control in the human brain.

关键词： functional magnetic resonance imaging diffusion tensor image corticopontocerebellar tract: motor control: ataxia

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