Department of Orthopaedics, Connecticut Children's Medical Center, Hartford, CT 06106, USA.
Spine (Phila Pa 1976). 2013 May 15;38(11):E656-61. doi: 10.1097/BRS.0b013e31828d255d.
Retrospective.
To demonstrate a relationship between adolescent idiopathic scoliosis Cobb angle measurements obtained with standing plain radiographs and standard supine magnetic resonance (MR) images.
Patients with adolescent idiopathic scoliosis are exposed to repeated doses of ionizing radiation during the course of their treatment with significant potential long-term health consequences. Supine MR images of the spine may allow measurements of coronal plane spinal deformity equivalent to plain radiographs while minimizing exposure to ionizing radiation.
A retrospective chart and radiograph review was conducted for patients with adolescent idiopathic scoliosis. Cobb angle measures were derived from available plain radiographs and MR images obtained within 6 months of each other. Pearson correlation and linear regression analysis was used to test the relationship between plain radiographical and magnetic resonance imaging Cobb measures. Inter- and intraobserver reliability for the Cobb measures was tested with a random sample of 20 patients using intraclass correlation coefficients.
Supine MR images tended to underestimate plain radiographs by 10° on average. However, radiographical and MR measures showed a strong positive correlation (r= 0.90-0.94) for all curves, structural or nonstructural, and this correlation was not influenced by patient age or body mass index. The relationship allowed the development of a simple linear equation for converting MR image measures to radiograph measures with an acceptable absolute error of ±5°.
Cobb angle measures from supine magnetic resonance imaging of the spine can reliably be translated to the equivalent radiographical measures with an acceptable range of error. The data suggest that standard supine magnetic resonance imaging sequences may be a viable substitute for plain radiographs in the clinical diagnosis and serial evaluation of adolescent idiopathic scoliosis while obviating the associated dangers of ionizing radiation from plain radiographs.
回顾性研究。
证明青少年特发性脊柱侧凸 Cobb 角测量值与站立位普通 X 射线和标准仰卧位磁共振（MR）图像之间的关系。
在青少年特发性脊柱侧凸患者的治疗过程中，他们会接受多次电离辐射，这可能会对长期健康造成重大影响。仰卧位脊柱 MR 图像可以测量冠状面脊柱畸形，与普通 X 射线相当，同时最大限度地减少电离辐射的暴露。
对青少年特发性脊柱侧凸患者进行了回顾性图表和 X 射线复查。从现有的普通 X 射线和彼此之间在 6 个月内获得的 MR 图像中得出 Cobb 角测量值。使用 Pearson 相关和线性回归分析来测试普通 X 射线和磁共振成像 Cobb 测量值之间的关系。使用 20 名患者的随机样本测试 Cobb 测量值的组内和组间可靠性，使用组内相关系数。
仰卧位 MR 图像平均比普通 X 射线低估 10°。然而，所有曲线（结构性或非结构性）的 X 射线和 MR 测量值之间均显示出很强的正相关（r=0.90-0.94），并且这种相关性不受患者年龄或体重指数的影响。该关系允许开发一个简单的线性方程，用于将 MR 图像测量值转换为具有可接受的绝对误差±5°的 X 射线测量值。
脊柱仰卧位磁共振成像的 Cobb 角测量值可以可靠地转换为等效的 X 射线测量值，误差范围在可接受范围内。这些数据表明，标准仰卧位磁共振成像序列可能是青少年特发性脊柱侧凸临床诊断和连续评估的一种可行替代方法，同时避免了普通 X 射线的电离辐射相关危险。
3。
