Specific 3-D measurement techniques, based on optical or opto-electronic principles of image capture, can today provide a complete set of results to quantify, without any risk for the patient, the actual state of the rachis and the effects induced by the disease on the whole postural performance. The book deals with theoretical and clinical aspects of spinal deformities. It covers topics such as 3-D acquisition, reconstruction and modelling techniques; 3-D biomechanical analysis; 3-D etiological and prognostic aspects; 3-D treatment of scoliosis; surface topography and internal 3-D spinal and/or trunk anatomy.