在在 3T 的健康成年人的眼的神经和眼的放射的磁性的回声散开张肌成像

• 作者: Dong Wang Hong-Hong Sun Ping He Qiu-Juan Zhang Zhi-Lan Bai
• 来源期刊: 国际眼科杂志：英文版
• 学科: 医学
• 关键词: magnetic resonance IMAGING diffusion TENSOR IMAGING OPTIC nerve OPTIC radiation fractional ANISOTROPY mean DIFFUSIVITY
• 年，卷（期）: 2013,（6）
• 页码范围: 868-872
• 页数: 5页
• 分类号: R774.6

摘要

AIM:To investigate the diffusion characteristics of water of optic nerve and optic radiation in healthy adults and its related factors by diffusion tensor imaging（DTI）at3T.METHODS:A total of 107 healthy volunteers performed head conventional MRI and bilateral optic nerve and optic radiation DTI.The primary data of DTI was processed by post-processing software of DTI studio 2.3,obtaining fractional anisotropy value,mean diffusivity value,principal engine value,orthogonal engine value by measuring,and analyzed by the SPSS13.0 statistical software.RESULTS:The bilateral optic nerve and optic radiation fibers presented green color in directional encoded color（DEC）maps and presented high signal in fractional anisotropy（FA）maps.The FA value of the left optic nerve was 0.598±0.069 and the right was 0.593±0.065;the mean diffusivity（MD）value of the left optic nerve was（1.324±0.349）×10^-3mm²/s and the right was（1.312±0.350）x10^-3mm²/s;the principal engine value(λ_?)of the left optic nerve was（2.297±0.522）×10^-4mm²/s and the right was（2.277±0.526）×10^-3mm²/s;the orthogonal engine value（λ_⊥）of the left optic nerve was（0.838±0.285）×10^-3mm²/s and the right was（0.830±0.280）×10^-3mm²/s;the FA value of the left optic radiation was 0.636±0.057 and the right was0.628±0.056;the mean diffusivity（MD）value of the left optic radiation was（0.907±0.103）×10^-3mm²/s and the right was（0.889±0.125）×10^-3mm²/s;the principal eigenvalue(λ_Ⅱ)of the left optic radiation was（1.655±0.210）×10^-3mm²/s and the right was（1.614±0.171）×10^-3mn²/s;the orthogonal enginvalue（λ_⊥）of the left optic radiation was（0.531±0.103）×10^-3mm²/s and the right was（0.524±0.152）×10^-3m