Comparative Study on Three Dimensional Back Surface Deformity of Idiopathic Scoliosis using Integrated Shape Investigation System(ISIS) and Moire Topography

哈里斯和特纳-史密斯在牛津整形外科开发的ISIS。为研究特发性脊柱侧凸畸形进展的背部形态分析，自1987年11月起对工程中心进行了调查，并与FM-40云纹地形图进行了比较。1)特发性脊柱侧凸39个曲度中，29个曲度未经治疗，侧方不对称指数(LAI)与Cobb角的相关系数分别为0.75和0.65。2)对15个曲度的侧方不对称指数和Cobb角进行了比较研究。以Cobb角7度、LAI 7分为级数，假阴性率为10%，假阳性率为5%。3)在支具治疗的情况下，这种差异被发现大大增加，21%的假阳性，假阳性。在16%。4)对15°及以上的特发性脊柱侧弯患者进行驼峰高度云纹地形图测量，以7°Cobb角和4 mm驼峰高度为进展，对X线检查前预测进展的概率分别为：真阳性8.1%，真阴性70.9%，假阴性2.4%，假阳性18.8%。应进一步研究这些表面成像技术的有效结合，以减少X线检查。

The ISIS developed by Harris and Turner-Smith in Oxford Orthop. Engineering Centre was investigated since Nov. 1987 comparing with Moire Topography using FM-40 for study on back shape analysis of idiopathic scoliosis concerning progression of the deformity. Following results were obtained at this time of moment, though a duration of follow-up period was short (averaged only for 7 months).1) In 29 of 39 curvatures of idiopatbic scoliosis, where no treatment has been given, a correlation co-efficient between LAI (Lateral Asymmetry Index) and Cobb angle showed 0.75 in thoracic and 0.65 in thoracolumbar curvatures. 2) In 15 of 20 curvatures a comparative study on progression of the deformity was done for Lateral Asymmetry Index and Cobb angle. On the premise that 7 degrees in Cobb angle and 7 points in LAI as progression, a false negative was found in 10% and a false positive in 5 %. 3) In cases of brace treatment this discrepancy was found to be much increased, as false positive in 21%, falseneg. in 16%. 4) Based on the moire topography measurement for hump height in patients with curvature of 15 degrees and more, probability of predicted progression was studied before X-ray examination as follows; true positive in 8.1%, true negative in 70.9%, false negative in 2.4% and false positive in 18.8% (16 patients) respectively, regarding 7 degrees Cobb angle and 4mm hump heigh as progression.Discussion; It was suggested that in follow-up study of idiopathic scoliosis progression can be presumed to a certain extent by analyzing the image of ISIS and moire topography. Further study of effective combination of these surface image technique should be required to reduce X-ray examinations.