Hackenberg Lars, Hierholzer Eberhard, Pötzl Wolfgang, Götze Christian, Liljenqvist Ulf
Klinik und Poliklinik für Allgemeine Orthopädie, Universitätsklinikum Münster, Albert-Schweitzer-Strasse 33, 48149, Münster, Germany.
Clin Biomech (Bristol). 2003 Jan;18(1):1-8. doi: 10.1016/s0268-0033(02)00165-1.
To determine the accuracy of rasterstereographic three-dimensional back surface analysis and reconstruction of the spine in cases of severe idiopathic scoliosis treated by anterior correction and fusion.
Comparison of digitized radiographic curves and rasterstereographic curves by best fit superimposition and calculation of root mean square differences as parameters of similarity.
Rasterstereography has been proven to be accurate in scoliosis up to 50 degrees Cobb angle. Since 1989 the device is in clinical routine use for non-operatively treated patients and reduces the need for otherwise indispensable radiographs significantly.
Fifty two patients with severe idiopathic scoliosis with Cobb angles up to 88 degrees were examined rasterstereographically and radiographically. Forty eight pre-operative anterior-posterior radiographs and 101 post-operative anterior-posterior radiographs were digitized. Radiographic and rasterstereographic curves were compared and the root mean square differences were calculated as parameters of precision of rasterstereographic reconstruction.
Accuracy of rasterstereography in idiopathic scoliosis with Cobb angles between 50 degrees and 88 degrees is satisfactory. The root mean square difference of the radiographic and rasterstereographic curves was 6.4 mm for lateral deviation and 4.5 degrees for vertebral rotation. After anterior scoliosis surgery the precision of the device is good. The root mean square difference for lateral deviation was 3.4 mm and 3.2 degrees for rotation. Considering both groups an average root mean square of 4.7 mm and 3.7 degrees was calculated.
Accuracy in severe scoliosis up to 88 degrees Cobb angle was satisfactory. The results of this first evaluation of surgically treated severe scoliosis showed a good accuracy after anterior surgery. The system can be used for post-operative follow up examinations and may reduce the number of X-rays considerably. In contrast to radiography, CT or MRI rasterstereography provides an objective quantification and documentation of the post-operative cosmetic improvement of the back shape in standing posture. RELEVANCE STATEMENT: Based on the findings of this study rasterstereography in future enables both objective quantification of cosmetic improvement and significant reduction of X-rays in idiopathic scoliosis with Cobb angles higher than 50 degrees before and after anterior surgical correction and fusion.
确定光栅立体摄影三维后表面分析及脊柱重建在重度特发性脊柱侧弯前路矫正融合治疗病例中的准确性。
通过最佳拟合叠加及计算均方根差作为相似性参数，对数字化放射影像曲线和光栅立体摄影曲线进行比较。
光栅立体摄影已被证明在Cobb角达50度的脊柱侧弯中准确。自1989年起该设备在临床常规用于非手术治疗患者，显著减少了原本不可或缺的X光片需求。
对52例Cobb角达88度的重度特发性脊柱侧弯患者进行光栅立体摄影和放射影像检查。将48张术前前后位X光片和101张术后前后位X光片数字化。比较放射影像和光栅立体摄影曲线，并计算均方根差作为光栅立体摄影重建精度的参数。
光栅立体摄影在Cobb角50度至88度的特发性脊柱侧弯中的准确性令人满意。放射影像和光栅立体摄影曲线的均方根差，侧弯为6.4毫米，椎体旋转为4.5度。前路脊柱侧弯手术后该设备精度良好。侧弯的均方根差为3.4毫米，旋转为3.2度。综合两组计算出平均均方根为4.7毫米和3.7度。
在Cobb角达88度的重度脊柱侧弯中准确性令人满意。对手术治疗的重度脊柱侧弯的首次评估结果显示前路手术后准确性良好。该系统可用于术后随访检查，并可大幅减少X光片数量。与放射摄影、CT或MRI不同，光栅立体摄影能对站立姿势下背部形状的术后美容改善进行客观量化和记录。相关声明：基于本研究结果，光栅立体摄影未来能够在特发性脊柱侧弯前路手术矫正融合前后，对Cobb角高于50度的病例进行美容改善的客观量化，并大幅减少X光片数量。
