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Comparison between Cobb's method and 3-D ultrasound imaging with the TP–SAP approach for the subject test. (A) Correlation between the spine curvature angles measured using Cobb's method and 3-D ultrasound imaging. (B) Bland–Altman plot between the results obtained by the two methods. 3-D = three-dimensional; TP = transverse process; SAP = superior articular process.
