Fan Xiaolong, Xue Deting, Pan Zhijun, Wang Yulu
Department of Orthopedics, 1st Affiliated Hospital of Baotou Medical College, Baotou, China.
Department of Orthopaedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
Front Surg. 2023 Feb 22;10:1103952. doi: 10.3389/fsurg.2023.1103952. eCollection 2023.
The purpose of the present study is to examine the possible correlation between standing plain x-rays and supine magnetic resonance imaging (MRI) for evaluating spinal sagittal alignment in degenerative lumbar disease (DLD).
The characteristics and images of 64 patients with DLD were reviewed retrospectively. The thoracolumbar junction kyphosis (TJK), lumbar lordosis (LL) and sacral slope (SS) were measured on lateral plain x-rays and by MRI. Inter- and intra-observer reliability was tested using intra-class correlation coefficients.
The results suggested that TJK measurements obtained from MRI tended to underestimate the radiographic measures by 2°, whereas SS measurements obtained from MRI tended to overestimate the radiographic measures by 2°. The LL measurements obtained from MRI were approximately equal to the radiographic measures, and the x-ray and MRI measurements were linearly related.
In conclusion, supine MRI can be directly translated into sagittal alignment angle measurements obtained from standing x-rays with an acceptable degree of accuracy. This can avoid the impaired view caused by the overlapping ilium, while reducing the patient's exposure to radiation.
本研究的目的是探讨站立位X线平片与仰卧位磁共振成像（MRI）在评估退变性腰椎疾病（DLD）脊柱矢状面排列方面的可能相关性。
回顾性分析64例DLD患者的特征和影像资料。在侧位X线平片和MRI上测量胸腰段交界区后凸（TJK）、腰椎前凸（LL）和骶骨倾斜角（SS）。采用组内相关系数检验观察者间和观察者内的可靠性。
结果表明，MRI测量的TJK往往比X线测量值低2°，而MRI测量的SS往往比X线测量值高2°。MRI测量的LL与X线测量值大致相等，且X线和MRI测量值呈线性相关。
总之，仰卧位MRI可以直接转换为从站立位X线获得的矢状面排列角度测量值，且具有可接受的准确度。这可以避免因髂骨重叠导致的视野受限，同时减少患者的辐射暴露。
