Comparison of sagittal parameters of MRI and X-ray in patients with cervical spondylosis myelopathy

English Keywords:Cervical spondylosis myelopathy  X-ray  MRI  Sagittal parameters  Position

English Abstract:

  【Abstract】 Objectives: To analyze the difference and correlation of cervical sagittal parameters in MRI and X-ray in patients with cervical spondylosis myelopathy(CSM). Methods: 42 outpatients with CSM up to standard were included, MRI and X-ray parameters were measured and analyzed including: T1 slope(T1S), thoracic inlet angle(TIA), neck nilting(NT), C2-C7 Cobb angle(Cobb angle). Pearson correlation test and paired samples t test were used to show the correlation and the difference between the two measurement methods, linear regression was employed to establish the linear model of the two measurement methods. Results: The measurements of NT and Cobb angle between MRI and the X-ray were significantly different(P<0.05); T1S ang TIA had no significantly difference(P>0.05). In the MRI, TIA was significantly correlated with T1S(r=0.677), NT(r=0.547), Cobb angle(r=0.50). There was correlation of T1S with TIA(r=0.677) and Cobb angle(r=0.514), but there was no correlation between T1S and NT. In the X-ray, there was a significant correlation of TIA with T1S(r=0.706) and NT(r=0.361), there was no significant correlation between TIA and Cobb angle. T1S was significantly correlated with NT(r=-0.325), TIA(r=0.706) and the Cobb angle(r=0.370). T1S, NT, TIA, Cobb angle in MRI and T1S(r=0.660), NT(r=0.624), TIA(r=0.746), Cobb(r=0.547) in X-ray showed significant correlations. Cobb(X)=8.12+0.59Cobb(MRI); T1S(X)=10.12+0.58T1S(MRI); TIA(X)= 25.74+0.64TIA(MRI); NT(X)=23.55+0.51NT(MRI). Conclusions: The measurement of TIA and T1S in cervical spine MRI is similar to that in X-ray, NT and Cobb angle have significantly correlation with X-ray, MRI parameters can be use to evaluate the sagittal balance of cervical spine.