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• Clinical Article •
Different cervical flexion positions of MRI in Hirayama disease
GAO Ya-juan  SUN Wan-li  WANG Wei  YUAN Lan 

DOI:10.12015/issn.1674-8034.2017.01.009.


[Abstract] Objective: To investigate different cervical flexion positions in Hirayama disease (HD) for the effects on these MRI features by cervical flexion angle.Materials and Methods: The cervical MR scans were carried out by a self-made equipment with a superconducting 1.5 T system. MRI examinations in different flexion positions (0°, 25°, 30°, 35°, 40°) of 19 patients, who were clinical diagnosed as HD. To summarize three MRI features including asymmetric cord flattening, anterior shifting of the posterior wall of the cervical dural canal (ASD), widening of cervical epidural space. The maximum sagittal diameters (d) of widened cervical epidural space and the cervical canal sagittal diameters (D) at the same level were measured . The d/D values at different angles were calculated and compared.Results: The appearance of MRI features were different between 0° group and other 4 larger angles groups (P=0.00). The mean d/D value was changing following different angles, reached max value in 35°.Conclusions: Neck flexion angles have effects on ASD, widening of cervical epidural space.
[Keywords] Hirayama disease；Magnetic resonance imaging；Cervical flexion angle

GAO Ya-juan Changzhi Medical College, Shanxi Province, Changzhi 046000, China; Department of MRI, Heping Hospital Affiliated to Changzhi Medical College, Shanxi Province, Changzhi 046000, China; Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China

SUN Wan-li* Changzhi Medical College, Shanxi Province, Changzhi 046000, China; Department of MRI, Heping Hospital Affiliated to Changzhi Medical College, Shanxi Province, Changzhi 046000, China

WANG Wei Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China

YUAN Lan Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China

*Correspondence to: Sun WL, E-mail: 2835756063@qq.com

Conflicts of interest   None.

ACKNOWLEDGMENTS  Supported by Twelfth Five-year Plan for National Science and Technology of China: The equipment for the treatment and therapy of brain diseases via interstitium No. 2012BAI15B09
Received  2016-09-20
Accepted  2016-11-26
DOI: 10.12015/issn.1674-8034.2017.01.009
DOI:10.12015/issn.1674-8034.2017.01.009.

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