期刊论文详细信息
Scoliosis
Rasterstereographic measurement of scoliotic deformity
Burkhard Drerup1 
[1] Bundesfachschule für Orthopaedietechnik, Schliepstrasse 6-8, Dortmund, Germany
关键词: Cobb angle;    Shape analysis;    Anatomical landmarks;    Symmetry line;    Curvature map;    Photogrammetry;    Rasterstereography;    Scoliosis;    Back surface;   
Others  :  1137171
DOI  :  10.1186/s13013-014-0022-7
 received in 2014-10-21, accepted in 2014-11-26,  发布年份 2014
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【 摘 要 】

Background

Back surface topography has gained acceptance in recent decades. At the same time, the motivation to use this technique has increased. From the view of the patient, the cosmetic aspect has played and still plays a major role as it provides a comprehensive documentation of cosmetic impairment. From the view of the medical practitioner, the aspect of reducing X-ray exposures in diagnosis and follow-up has been dominant and still prevails. Meanwhile, new aspects have emerged: due to the consequent three-dimensional view of the scoliotic condition, treatment success can be visualized convincingly. Clinical diagnosis is supported by information otherwise not supplied by X-rays, such as when functional examinations and diagnostic tests are recorded.

Methods

Like rasterstereography, most techniques of actual back surface measurement refer to photogrammetry and the triangulation method. However, with respect to the particular clinical application, a wide spectrum of implementations exists. Applications in a clinic require high accuracy of measurement in a short time and comprehensive analysis providing data to be used to supplement and compare with radiographic data. This is exemplified by rasterstereography; the procedures of surface analysis and localization of landmarks using curvatures and the reconstruction of the spinal midline will be described.

Orthopaedic relevance

Based on rasterstereographic analysis, different geometrical measures that characterize the back surface are given and underlying skeletal structures described. Furthermore, in analogy to radiological projection, a 3-D reconstruction of the spinal midline is visualized by a frontal and lateral projection, allowing comparison with pertinent X-rays.

Conclusions

Surface topography and, in particular, rasterstereography provide reliable and consistent results that may be used to reduce X-ray exposure. Unfortunately, the correlation of shape parameters with the radiological Cobb angle is poor. However, the wealth of additional applications substantially enhances the spectrum of clinical value.

【 授权许可】

   
2014 Drerup; licensee BioMed Central.

【 预 览 】
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