肌萎缩侧索硬化症的颈髓MR扩散张量成像研究  被引量:2

Preliminary study of cervical spinal cord in patients with amyotrophic lateral sclerosis using MR diffusion tensor imaging

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作  者:王岩[1] 马林[1] 李德军[2] 郭行高[1] 

机构地区:[1]解放军总医院放射科,北京100853 [2]解放军总医院医学工程中心,北京100853

出  处:《中华放射学杂志》2009年第10期1017-1020,共4页Chinese Journal of Radiology

基  金:国家自然科学基金资助项目(30470512)

摘  要:目的了解常规MR检查阴性的肌萎缩侧索硬化症(ALS)患者颈髓DTI的各项参数值的变化情况。方法选取临床诊断为ALS患者(ALS组)16例及16名年龄、性别匹配的健康志愿者(正常组)行颈髓常规MRI及横断面DTI。DTI图像经工作站(AW4.2)后处理,获得ADC图、部分各向异性(FA)图和相对各向异性(RA)图。在c3椎体水平层面分别在颈髓前索区、后索区及双侧皮质脊髓侧束区4个区域内选取面积约5mmx5mm的ROI,测定其ADC值、FA值和RA值。使用独立样本t检验对两组间各项参数值进行比较,使用Pearson相关分析分别对ALS患者异常参数值与ALS患者病程、Norris评分及功能质量相关评分(ALSFRS)进行相关性分析。结果ALS组左、右侧皮质脊髓侧束的FA、RA值较正常组减低。其中ALS组左侧皮质脊髓侧束的FA、RA值为0.762±0.089、0.762±0.107,正常组为0.863±0.098、0.890±0.105;ALS组右侧皮质脊髓侧束的FA、RA值为0.751±0.065、0.772±0.082,正常组为0.843±0.118、0.863±0.134,差异均具有统计学意义(t值分别为2.575、4.195、2.246、2.218,P值均〈0.05)。ALS组左、右侧皮质脊髓侧束的ADC值分别为(0.744±0.162)、(0.767±0.141)×10^-3mm^2/s,正常组为(0.640±0.149)、(0.643±0.168)×10^-3mm^2/s,两组间差异无统计学意义(t值分别为-1.319、-1.087,P值均〉0.05)。ALS组前索FA、RA及ADC值分别为0.637±0.113、0.622±0.138、(0.950±0.354)×10^-3mm^2/s,正常组分别为0.670±0.117、0.656±0.136、(0.865±0.238)×10^-3mm^2/s,两组间差异无统计学意义(t值分别为0.854、-0.704、-1.155,P值均〉0.05)。ALS组后索FA、PtA及ADC值分别为0.886±0.073、0.920±0.100、(0.613±0.137)×10^-3mm^2/s,正常组分别为0.906±0.078、0.914±0.135、(0.636±0.224)×10^-3mm^2�Objective To determine whether normal-appearing cervical spinal cord in patients with amyotrophic lateral sclerosis (ALS) has abnormal changes based on the quantitative measurement in healthy volunteers. Methods Conventional MRI and axial DTI were obtained in 16 patients with ALS (ALS group) and 16 age-matched control subjects (normal group). ADC, fractional anisotropy (FA)and relative anisotropy(RA)images were obtained on workstation ( AW4. 2). ROls (5 mm × 5 mm) were placed in anterior funiculus, posterior funiculus, and bilateral lateral corticospinal tracts (LCTs), respectively, at the same slice ( C3 ). Independent-sample t test was used for comparison of parameters between the two groups. Correlations between DTI parameters of ALS and ALS course, Norris score, and ALSFRS were carried out separately by Pearson correlation analysis. Results FA and RA values of bilateral LCTs were decreased significantly. FA/RA values of left LCT were 0. 762 ±0. 089 and 0. 762 ±0. 107 in ALS group, while they were 0. 863 +0. 098 and 0. 890 ± 0. 105 in control group, respectively. FA/RA values of right LCT were 0. 751 ±0. 065 and 0. 772 ± 0. 082 in ALS group, and they were 0. 843 ± 0. 118 and 0. 863 ± 0. 134 in control group, respectively, they were decreased significantly ( t = 2. 575,4. 195,2. 246,2. 218, P 〈 0. 05 ). There were no significant differences (t = - 1. 319, - 1. 087, P 〉 0. 05 ) between ADC values of left and right CSTs in ALS group [ (0. 744 ±0. 162)× 10^-3, (0. 767 ± 0. 141 ) × 10^-3 mm^2/s] and control group [ (0. 640 ±0. 149) × 10^-3, (0. 643±0. 168) × 10^-3 mm^2/s) ]. FA, RA and ADC values of ALS patients in anterior funiculus were 0.637 ±0. 113, 0.622 ±0. 138, (0.950 ±0.354) × 10^-3 mm^2/s, in control group they were 0. 670 ±0. 117, 0. 656 ±0. 136, (0. 865±0. 238)×10^-3 mm^2/s, there were no significant differences ( t = 0. 854, - 0. 704, - 1. 155 ,P 〉 0. 05 ). FA, RA and ADC values of ALS patients in p

关 键 词:肌萎缩侧索硬化 磁共振成像 弥散 脊髓 

分 类 号:R686[医药卫生—骨科学]

 

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