Here is a really good, recent article explaining how Scoliosis curves are measured and assessed.
Radiographic Evaluation of Scoliosis:
http://www.ajronline.org/doi/pdf/10.2214/AJR.07.7145
Radiographic Evaluation of Scoliosis:
http://www.ajronline.org/doi/pdf/10.2214/AJR.07.7145
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