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. 2019 Apr 12;8(4):501. doi: 10.3390/jcm8040501

Figure 1.

Figure 1

Measurement of spinopelvic parameters, sagittal vertical axis (SVA) and center of the fractured vertebra (DSVA). Owing to the nature and deviation of the spine lateral plain films, we defined the center of the femoral head used in the measurement of this study as the midpoint between femoral head of bilateral side. PI was defined as the angle between the vertical line of the sacral plateau and the line drawn from the mid-sacral plateau to the center of the femoral head. PT was defined as the angle between a line drawn from the mid-sacral plateau to the center of the femoral head and plumb line of the center of the femoral head. SS was defined as the angle between the sacral plateau and a horizontal line. Following Cobb’s method, LL was defined as the angle between the superior endplates of the L1 and S1 vertebrae. SVA was defined as the distance from the posterosuperior corner of S1 to the C7 plumb line. DSVA was defined as the distance between the C7 plumb line and the center of the fractured vertebra.