BMC Medical Imaging | |
Determination of the human spine curve based on laser triangulation | |
Matija Jezeršek2  Janez Možina2  Dušan Čelan1  Primož Poredoš2  | |
[1] University Medical Centre Maribor, Ljubljanska ulica 5, Maribor, 2000, Slovenia;University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, Ljubljana, 1000, Slovenia | |
关键词: Cubic splines; Spatial spine curve; Scoliosis; Back shape analysis; 3D; Laser profilometry; | |
Others : 1125921 DOI : 10.1186/s12880-015-0044-5 |
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received in 2014-08-11, accepted in 2015-01-21, 发布年份 2015 | |
【 摘 要 】
Background
The main objective of the present method was to automatically obtain a spatial curve of the thoracic and lumbar spine based on a 3D shape measurement of a human torso with developed scoliosis. Manual determination of the spine curve, which was based on palpation of the thoracic and lumbar spinous processes, was found to be an appropriate way to validate the method. Therefore a new, noninvasive, optical 3D method for human torso evaluation in medical practice is introduced.
Methods
Twenty-four patients with confirmed clinical diagnosis of scoliosis were scanned using a specially developed 3D laser profilometer. The measuring principle of the system is based on laser triangulation with one-laser-plane illumination. The measurement took approximately 10 seconds at 700 mm of the longitudinal translation along the back. The single point measurement accuracy was 0.1 mm. Computer analysis of the measured surface returned two 3D curves. The first curve was determined by manual marking (manual curve), and the second was determined by detecting surface curvature extremes (automatic curve). The manual and automatic curve comparison was given as the root mean square deviation (RMSD) for each patient. The intra-operator study involved assessing 20 successive measurements of the same person, and the inter-operator study involved assessing measurements from 8 operators.
Results
The results obtained for the 24 patients showed that the typical RMSD between the manual and automatic curve was 5.0 mm in the frontal plane and 1.0 mm in the sagittal plane, which is a good result compared with palpatory accuracy (9.8 mm). The intra-operator repeatability of the presented method in the frontal and sagittal planes was 0.45 mm and 0.06 mm, respectively. The inter-operator repeatability assessment shows that that the presented method is invariant to the operator of the computer program with the presented method.
Conclusions
The main novelty of the presented paper is the development of a new, non-contact method that provides a quick, precise and non-invasive way to determine the spatial spine curve for patients with developed scoliosis and the validation of the presented method using the palpation of the spinous processes, where no harmful ionizing radiation is present.
【 授权许可】
2015 Poredoš et al.; licensee BioMed Central.
【 预 览 】
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