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Fig. 9 Second principal deformation modes for a dataset of adolescent idiopathic scoliosis
patients. Spine models were rendered (from left to right) for 3, 0, and 3 times the standard
deviation explained by the corresponding deformation mode. a Front view. b Lateral view
of adolescent patients being at various stages in their growth and the development
of a scoliotic curve.
The second mode (as seen in Fig. 9 ) can be described as a double thoraco-lumbar
curve. In this case, there are two opposing curves: one in the thoracic segment
(upper spine) and another in the lumbar segment (lower spine). The third mode of
deformation (illustrated by Fig. 10 ) is another thoracic curve, but it affects a more
important portion of the spine than the curve observed in the
first mode. It is also
interesting to note that, in addition to the curves visible on the posterior
anterior
view, the second and third principal deformation modes are also associated with the
development of a kyphosis (back hump) that can be observed in the lateral view.
-
Fig. 10 Third principal deformation modes for a dataset of adolescent idiopathic scoliosis
patients. Spine models were rendered (from left to right) for 3, 0, and 3 times the standard
deviation explained by the corresponding deformation mode. a Front view. b Lateral view
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