C7 斜率能否替代 T1 斜率？：颈椎 X 线片和运动学 MRI 的分析。
Can C7 Slope Substitute the T1 slope?: An Analysis Using Cervical Radiographs and Kinematic MRIs.
机构信息
Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA.
Department of Orthopedics, Osaka City University Graduate School of Medicine, Osaka, Japan.
出版信息
Spine (Phila Pa 1976). 2018 Apr 1;43(7):520-525. doi: 10.1097/BRS.0000000000002371.
STUDY DESIGN
Retrospective analysis of consecutive 45 radiographs and 120 kinematic magnetic resonance images (kMRI) OBJECTIVE.: The aim was to assess the visibility of C7 and T1 endplates on radiographs, and to verify the correlation between C7 or T1 slope and cervical balance parameters using kMRI.
SUMMARY OF BACKGROUND DATA
Because the T1 slope is not always visible due to the anatomical interference, several studies have used C7 slope instead of T1. However, it is still unclear whether the C7 endplate is more visible on radiographs than T1, and if C7 slope has similarity with T1 slope.
METHODS
The endplate visibility was determined using weight-bearing radiography. Subsequently, using weight-bearing MR images, the C7 slope of upper and lower endplate, T1 slope, C1 inclination, C2 slope, atlas-dens interval (ADI), C2-C7 lordotic angle, cervical sagittal vertical axis (cSVA), cervical tilt, cranial tilt, neck tilt, thoracic inlet angle (TIA) were measured, for the analysis of correlation between three types of slopes and cervical balance parameters.
RESULTS
82% of the upper C7, and 18% of T1 endplate were clearly visible. The upper C7 endplate was significantly visible, whereas T1 endplate was significantly invisible (residual analysis, P < 0.01). Linear regression analysis showed correlation between the upper C7 slope and T1 slope (R = 0.818, P < 0.01) and, lower C7 slope and T1 slope (R = 0.840, P < 0.01). T1 slope significantly correlated with neck tilt, TIA, C2-C7 angle, cSVA, cervical and cranial tilt, but not with the C1 inclination, C2 slope, and ADI. Upper and lower C7 slopes showed the close resemblance with T1 slope in terms of correlation with those parameters.
CONCLUSION
Both, upper and lower C7 slope correlated strongly with T1 slope and showed similar relationship with cervical balance parameters as T1 slope. Therefore, C7 slope could potentially substitute T1 slope, especially upper C7 slope due to the good visibility.
LEVEL OF EVIDENCE
研究设计
回顾性分析连续 45 张射线照片和 120 张运动学磁共振图像（kMRI）
目的
旨在评估射线照片上 C7 和 T1 终板的可见度，并通过 kMRI 验证 C7 或 T1 斜率与颈椎平衡参数之间的相关性。
背景资料总结
由于解剖学干扰，T1 斜率并不总是可见，因此一些研究使用 C7 斜率代替 T1。然而，目前尚不清楚射线照片上 C7 终板是否比 T1 更可见，以及 C7 斜率是否与 T1 斜率相似。
方法
使用负重射线照相术确定终板可见度。随后，使用负重磁共振图像，测量 C7 上、下终板的 C7 斜率、T1 斜率、C1 倾斜度、C2 斜率、寰枢椎间隙（ADI）、C2-C7 前凸角、颈椎矢状垂直轴（cSVA）、颈椎倾斜度、颅倾斜度、颈倾斜度、胸入口角（TIA），分析三种斜率与颈椎平衡参数之间的相关性。
结果
82%的 C7 上终板和 18%的 T1 终板清晰可见。C7 上终板明显可见，而 T1 终板明显不可见（残差分析，P<0.01）。线性回归分析显示 C7 上斜率与 T1 斜率之间存在相关性（R=0.818，P<0.01）和 C7 下斜率与 T1 斜率之间的相关性（R=0.840，P<0.01）。T1 斜率与颈倾斜度、TIA、C2-C7 角、cSVA、颈椎和颅倾斜度显著相关，但与 C1 倾斜度、C2 斜率和 ADI 不相关。C7 上、下斜率与 T1 斜率在与这些参数的相关性方面表现出相似的关系。
结论
C7 上、下斜率与 T1 斜率密切相关，与 T1 斜率一样，与颈椎平衡参数之间也存在相似的关系。因此，C7 斜率可以替代 T1 斜率，尤其是由于 C7 上终板的良好可见度，可以替代 T1 斜率。
证据水平
3。
Zotero 插件