Lumbar vertebrae   Thoracic vertebrae   Kyphosis   Lordosis   Lumbar vertebrae pathology   Lasers   Spinal curvatures   Thoracic vertebrae pathology   Kyphosis pathology   Spinal curvatures pathology   Lordosis pathology   Lasers diagnostic use   Human   Female   Male   Adult   Middle aged   Aged   Young adult   Reproducibility of results   Lasers standards