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学科主题: 临床医学
题名:
How does the neck flexion affect the cervical MRI features of Hirayama disease?
作者: Hou, Chao1; Han, Hongbin1; Yang, Xiaohong2; Xu, Xiaojuan1; Gao, Hui3; Fan, Dongsheng4; Fu, Yu4; Sun, Yu5; Liu, Bo6
关键词: Hirayama disease ; Cervical flexion angle ; Magnetic resonance imaging
刊名: NEUROLOGICAL SCIENCES
发表日期: 2012-10-01
DOI: 10.1007/s10072-011-0912-x
卷: 33, 期:5, 页:1101-1105
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Clinical Neurology ; Neurosciences
研究领域[WOS]: Neurosciences & Neurology
关键词[WOS]: UPPER EXTREMITY ; SPINAL-CORD
英文摘要:

Although flexion cervical MRI has been recommended for the diagnosis of Hirayama disease (HD), no study focused on the MR features at different neck flexion angles. Moreover, no uniform flexion angle has been confirmed in clinical practice. The purpose of this study is to quantitatively investigate the MRI typical signs of HD patients in different neck flexion degree and gives a suggestion to the MR scanning. Cervical MRI in neutral and different flexion positions (cervical flexion angle 20A degrees, 25A degrees, 30A degrees, 35A degrees, and 40A degrees) were performed in 45 HD patients. Three MRI features including anterior shifting of the posterior wall of the cervical dural canal (ASD), widening of cervical epidural space, and epidural flow voids (EFV) at each flexed position were summarized. To evaluate ASD quantitatively, the widest cervical epidural space with the maximum sagittal diameters (d) and cervical canal sagittal diameter (D) at the same level were measured. The d/D values at different angles were calculated and compared. ASD was demonstrated in 34 out of 45 cases (75.6%) at 20A degrees and in all cases (100%) at other 4 angles (chi (2) = 25.728, P < 0.05). Significant difference was demonstrated for the appearance rate of EFV (mean 72.8%) among different angles (chi (2) = 11.373, P = 0.021). The peak mean d/D value was found at 35A degrees. Neck flexion angles have effects on ASD, widening of cervical epidural space and EFV. 25A degrees is recommended as the least effective diagnostic flexion angle for MRI diagnosis of HD, and 35A degrees may be the best one.

语种: 英语
所属项目编号: NCET-05-0019 ; 30972811
项目资助者: Program for New Century Excellent Talents in University ; National Natural Science Foundation of China ; Beijing municipal commission of education
WOS记录号: WOS:000308819000019
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/63142
Appears in Collections:北京大学第三临床医学院_放射科_期刊论文

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作者单位: 1.Peking Univ, Dept Radiol, Hosp 3, Beijing 100191, Peoples R China
2.Dalian Med Univ, Hosp 2, Dalian, Peoples R China
3.Beijing Jishuitan Hosp, Dept Ultrasound, Beijing 100035, Peoples R China
4.Peking Univ, Dept Neurol, Hosp 3, Beijing 100191, Peoples R China
5.Peking Univ, Dept Orthoped, Hosp 3, Beijing 100191, Peoples R China
6.Beihang Univ, Image Proc Ctr, Beijing 100191, Peoples R China

Recommended Citation:
Hou, Chao,Han, Hongbin,Yang, Xiaohong,et al. How does the neck flexion affect the cervical MRI features of Hirayama disease?[J]. NEUROLOGICAL SCIENCES,2012,33(5):1101-1105.
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