Limits...
Laser triangulation measurements of scoliotic spine curvatures.

Čelan D, Jesenšek Papež B, Poredoš P, Možina J - Scoliosis (2015)

Bottom Line: All the measured parameters were compared between the scoliotic and control groups using the Student's t-Test in case of normal data and Kruskal-Wallis test in case of non-normal data.While the distances between the extreme points of the spine in the AP view were found to differ only slightly between the groups (p = 0.1), the distances between the LR extreme points were found to be significantly greater in the scoliosis group, compared to the control group (p < 0.001).The quotient LR/AP was statistically significantly different in both groups (p < 0.001).

View Article: PubMed Central - PubMed

Affiliation: University of Maribor, Faculty of Medicine, Taborska ulica 8, 2000 Maribor, Slovenia ; University Medical Centre Maribor, Ljubljanska ulica 5, 2000 Maribor, Slovenia.

ABSTRACT

Background: The main purpose of this research was to develop a new method for differentiating between scoliotic and healthy subjects by analysing the curvatures of their spines in the cranio-caudal view.

Methods: The study included 247 subjects with physiological curvatures of the spine and 28 subjects with clinically confirmed scoliosis. The curvature of the spine was determined by a computer analysis of the surface of the back, measured with a non-invasive, 3D, laser-triangulation system. The determined spinal curve was represented in the transversal plane, which is perpendicular to the line segment that was defined by the initial point and the end point of the spinal curve. This was achieved using a rotation matrix. The distances between the extreme points in the antero-posterior (AP) and left-right (LR) views were calculated in relation to the length of the spine as well as the quotient of these two values LR/AP. All the measured parameters were compared between the scoliotic and control groups using the Student's t-Test in case of normal data and Kruskal-Wallis test in case of non-normal data. Besides, a comprehensive diagram representing the distances between the extreme points in the AP and LR views was introduced, which clearly demonstrated the direction and the size of the thoracic and lumbar spinal curvatures for each individual subject.

Results: While the distances between the extreme points of the spine in the AP view were found to differ only slightly between the groups (p = 0.1), the distances between the LR extreme points were found to be significantly greater in the scoliosis group, compared to the control group (p < 0.001). The quotient LR/AP was statistically significantly different in both groups (p < 0.001).

Conclusions: The main innovation of the presented method is the ability to differentiate a scoliotic subject from a healthy subject by assessing the curvature of the spine in the cranio-caudal view. Therefore, the proposed method could be useful for human posture diagnostics as well as to provide a long-term monitoring of scoliotic spine curvatures in preventive and curative clinical practice at all levels of health care.

No MeSH data available.


Related in: MedlinePlus

Diagram showing the course of the spine curve in the cranio-caudal view. Besides, the measured distances between the extreme points, denoted as AP and LR are shown. The red-coloured spinal curve denotes the thoracic spinal curve points, while the green-coloured spinal curve denotes the lumbar spinal curve points
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
getmorefigures.php?uid=PMC4556047&req=5

Fig1: Diagram showing the course of the spine curve in the cranio-caudal view. Besides, the measured distances between the extreme points, denoted as AP and LR are shown. The red-coloured spinal curve denotes the thoracic spinal curve points, while the green-coloured spinal curve denotes the lumbar spinal curve points

Mentions: The most important procedure step is the determination of the thoracic and lumbar spatial spinal curve between the C and L point by detecting the surface curvature extremes from the 3D measurement of the shape of the back, which is thoroughly described in [7]. In the last step the determined curve of the spine is translated and rotated using the rotation matrix [11]. As a result the curve of the spine is presented in the transversal plane, which is perpendicular to a line segment that is defined by the initial point and the end point of the spinal curve. Curvatures of the spine in the cranio-caudal view are presented by projecting the automatically determined spatial curve of the spine on the diagram shown in Fig. 1 with the following properties:


Laser triangulation measurements of scoliotic spine curvatures.

Čelan D, Jesenšek Papež B, Poredoš P, Možina J - Scoliosis (2015)

Diagram showing the course of the spine curve in the cranio-caudal view. Besides, the measured distances between the extreme points, denoted as AP and LR are shown. The red-coloured spinal curve denotes the thoracic spinal curve points, while the green-coloured spinal curve denotes the lumbar spinal curve points
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4556047&req=5

Fig1: Diagram showing the course of the spine curve in the cranio-caudal view. Besides, the measured distances between the extreme points, denoted as AP and LR are shown. The red-coloured spinal curve denotes the thoracic spinal curve points, while the green-coloured spinal curve denotes the lumbar spinal curve points
Mentions: The most important procedure step is the determination of the thoracic and lumbar spatial spinal curve between the C and L point by detecting the surface curvature extremes from the 3D measurement of the shape of the back, which is thoroughly described in [7]. In the last step the determined curve of the spine is translated and rotated using the rotation matrix [11]. As a result the curve of the spine is presented in the transversal plane, which is perpendicular to a line segment that is defined by the initial point and the end point of the spinal curve. Curvatures of the spine in the cranio-caudal view are presented by projecting the automatically determined spatial curve of the spine on the diagram shown in Fig. 1 with the following properties:

Bottom Line: All the measured parameters were compared between the scoliotic and control groups using the Student's t-Test in case of normal data and Kruskal-Wallis test in case of non-normal data.While the distances between the extreme points of the spine in the AP view were found to differ only slightly between the groups (p = 0.1), the distances between the LR extreme points were found to be significantly greater in the scoliosis group, compared to the control group (p < 0.001).The quotient LR/AP was statistically significantly different in both groups (p < 0.001).

View Article: PubMed Central - PubMed

Affiliation: University of Maribor, Faculty of Medicine, Taborska ulica 8, 2000 Maribor, Slovenia ; University Medical Centre Maribor, Ljubljanska ulica 5, 2000 Maribor, Slovenia.

ABSTRACT

Background: The main purpose of this research was to develop a new method for differentiating between scoliotic and healthy subjects by analysing the curvatures of their spines in the cranio-caudal view.

Methods: The study included 247 subjects with physiological curvatures of the spine and 28 subjects with clinically confirmed scoliosis. The curvature of the spine was determined by a computer analysis of the surface of the back, measured with a non-invasive, 3D, laser-triangulation system. The determined spinal curve was represented in the transversal plane, which is perpendicular to the line segment that was defined by the initial point and the end point of the spinal curve. This was achieved using a rotation matrix. The distances between the extreme points in the antero-posterior (AP) and left-right (LR) views were calculated in relation to the length of the spine as well as the quotient of these two values LR/AP. All the measured parameters were compared between the scoliotic and control groups using the Student's t-Test in case of normal data and Kruskal-Wallis test in case of non-normal data. Besides, a comprehensive diagram representing the distances between the extreme points in the AP and LR views was introduced, which clearly demonstrated the direction and the size of the thoracic and lumbar spinal curvatures for each individual subject.

Results: While the distances between the extreme points of the spine in the AP view were found to differ only slightly between the groups (p = 0.1), the distances between the LR extreme points were found to be significantly greater in the scoliosis group, compared to the control group (p < 0.001). The quotient LR/AP was statistically significantly different in both groups (p < 0.001).

Conclusions: The main innovation of the presented method is the ability to differentiate a scoliotic subject from a healthy subject by assessing the curvature of the spine in the cranio-caudal view. Therefore, the proposed method could be useful for human posture diagnostics as well as to provide a long-term monitoring of scoliotic spine curvatures in preventive and curative clinical practice at all levels of health care.

No MeSH data available.


Related in: MedlinePlus