Computer-Generated, Three-Dimensional Spine Model From Biplanar Radiographs: A Validity Study in Idiopathic Scoliosis Curves Greater Than 50 Degrees.
Computer-Generated, Three-Dimensional Spine Model From Biplanar Radiographs: A Validity Study in Idiopathic Scoliosis Curves Greater Than 50 Degrees.
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DOI：
10.1016/j.jspd.2013.10.003
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发表时间：
2014-03-01
期刊：
影响因子：
1.6
通讯作者：
Newton, Peter O
中科院分区：
文献类型：
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作者：
Carreau, Joseph H;Bastrom, Tracey;Newton, Peter O
研究设计：SterEOS三维（3D）软件在大型特发性脊柱侧凸（IS）脊柱弯曲中的再现性研究目的：确定从二维（2D）成像系统采集的各种3D、软件生成的放射摄影测量的准确性和再现性。背景数据概要：SterEOS软件允许用户从直立、双平面、低剂量X射线系统重建3D脊柱模型。方法：收集30例IS患者的EOS图像，分析其在大IS曲线上的有效性和内部一致性。对研究方案设盲的三名观察员进行了重复、随机、手动2D测量，3D软件根据EOS成像系统采集的双平面图像生成测量结果。使用全3D和快速3D引导过程重复三维测量。共获得180组（120组3D和60组2D）冠状面（Cobb角）和矢状面（T1-T12和T4-T12脊柱后凸; L1-S1和L1-L5;以及骨盆倾斜、骨盆倾角和骶骨倾斜）参数的测量值。比较了类内相关系数，以及SterEOS 3D软件和手动2D测量生成的值的计算差异。在措施的平均差异的95%置信区间计算作为reproducibility. RESULTS的估计：平均类内相关系数是优秀的：0.97，0.97，和0.93全3D，快速3D和2D措施，分别（p = 0.11）。一些矢状面测量的测量误差与3D技术相比显著降低。Full 3D和Fast 3D技术均提供了轴向平面椎体旋转的一致测量值。结论：SterEOS 3D重建脊柱软件在弯曲大于50 °的所有3个畸形平面中创建了可重复的测量值。三维脊柱侧凸成像的进步有望提高我们对特发性脊柱侧凸的理解和治疗。
STUDY DESIGN: Reproducibility study of SterEOS 3-dimensional (3D) software in large, idiopathic scoliosis (IS) spinal curves.OBJECTIVE: To determine the accuracy and reproducibility of various 3D, software-generated radiographic measurements acquired from a 2-dimensional (2D) imaging system.SUMMARY OF BACKGROUND DATA: SterEOS software allows a user to reconstruct a 3D spinal model from an upright, biplanar, low-dose, X-ray system. The validity and internal consistency of this system have not been tested in large IS curves.METHODS: EOS images from 30 IS patients with curves greater than 50° were collected for analysis. Three observers blinded to the study protocol conducted repeated, randomized, manual 2D measurements, and 3D software generated measurements from biplanar images acquired from an EOS Imaging system. Three-dimensional measurements were repeated using both the Full 3D and Fast 3D guided processes. A total of 180 (120 3D and 60 2D) sets of measurements were obtained of coronal (Cobb angle) and sagittal (T1-T12 and T4-T12 kyphosis; L1-S1 and L1-L5; and pelvic tilt, pelvic incidence, and sacral slope) parameters. Intra-class correlation coefficients were compared, as were the calculated differences in values generated by SterEOS 3D software and manual 2D measurements. The 95% confidence intervals of the mean differences in measures were calculated as an estimate of reproducibility.RESULTS: Average intra-class correlation coefficients were excellent: 0.97, 0.97, and 0.93 for Full 3D, Fast 3D, and 2D measures, respectively (p = .11). Measurement errors for some sagittal measures were significantly lower with the 3D techniques. Both the Full 3D and Fast 3D techniques provided consistent measurements of axial plane vertebral rotation.CONCLUSIONS: SterEOS 3D reconstruction spine software creates reproducible measurements in all 3 planes of deformity in curves greater than 50°. Advancements in 3D scoliosis imaging are expected to improve our understanding and treatment of idiopathic scoliosis.