| 裴新龙,韩鸿宾,谢敬霞,宋国军,付瑜.平山病的动态磁共振成像研究[J].中国医学影像技术,2006,22(8):1255~1257 |
| 平山病的动态磁共振成像研究 |
| Dynamic magnetic resonance imaging study on Hirayama disease |
| 投稿时间：2006-03-22 修订日期：2006-05-15 |
| DOI： |
| 中文关键词: 平山病 磁共振成像 |
| 英文关键词:Hirayama disease Magnetic resonance imaging |
| 基金项目:教育部"新世纪优秀人才支持计划"基金资助(NCET-05-0019)。 |
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| 中文摘要: |
| 目的 通过颈椎中立位及过屈位磁共振扫描观察平山病患者颈髓形态的变化,进一步分析平山病诊断的影像学依据,并初步探讨平山病的发病机制。方法 选择正常人无颈椎病史30例,以及确诊平山病患者20例,进行颈椎中立位及过屈位磁共振扫描,选择C6水平分别在两种体位测量颈髓正中线前后径,另外测量过屈位相邻两个椎体后缘的角度。结果 患者C6水平颈髓前后径中立位(Dn)及过屈位(Df)分别为(0.542±0.076)cm、(0.418±0.067)cm,正常对照Dn及Df分别为(0.670±0.049)cm、(0.595±0.047)cm,患者均较正常人小(P<0.01),且过屈位颈髓前后径患者较正常人变小更为明显,且以一侧变扁为著(P<0.01)。过屈位相邻椎体后缘成角依次为AC3-4 (3.0±2.0)°、AC4-5 (6.7±2.2)°、AC5-6 (11.8±2.3)°、AC6-7 (8.6±3.7)°,下颈段大于上颈段(AC5-6> AC6-7> AC4-5> AC3-4)。结论 磁共振成像可以明确显示平山病形态学改变,是诊断平山病的重要依据之一,下颈段颈椎成角较大,可能是造成平山病集中在下颈段脊髓的原因之一。 |
| 英文摘要: |
| Objective To determine the features in Hirayama disease with MRI and analyze its mechanism, through investigating dynamic changes of the cervical dural sac and spinal cord during in a neutral neck position and flexion. Methods Twenty patients and thirty healthy subjects underwent MRI scan in a neutral neck position and flexion, in order to measure anteroposterior (AP) diameter in central position at C6 level, and crossing angle of dorsal margin of adjacent vertebrae. Results Dn and Df of patients were (0.542±0.076) cm, (0.418±0.067) cm, those of normal subjects were (0.670±0.049) cm, (0.595±0.047) cm. A distinctive finding in patients was forward displacement of the cervical dural sac and compressive flattening of the lower cervical cord during neck flexion. The AP diameter in flexion was significantly smaller in patients than in age-matched control subjects(P<0.01), and had evident unilateral dominance. The angle of lower cervical spine was greater than the superior. Conclusion MRI can reveal abnormalities of the lower cervical dural sac and spinal cord of Hirayama disease. Greater angle of lower cervical spine possibly causes flattening of the lower cervical cord. |
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