Article Figures & Data
Figures
- Figure 1
Lateral x-ray image of a 48-year-old man showing spinopelvic parameters: pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS).
- Figure 2
(A) Sagittal slice of pelvic computed tomography (CT) image of the same patient showing coordinates of the right femoral heads. (B) Sagittal slice of pelvic CT with coordinates of the left femoral head. (C) (Changed) Midsagittal CT slice of the patient. The point with average coordinates of the femoral head center determines the midpoint of the hip axis.
- Figure 3
According to the midpoint of the hip axis spinopelvic parameters: pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS).
Tables
- Table 1
Intra- and interobserver reliability of spinopelvic parameters measured on x-ray and CT images.
Parameter Intraobserver Interobserver PI x-ray 0.90 0.85 PI CT 0.99 0.98 PT x-ray 0.89 0.87 PT CT 0.99 0.98 Abbreviations: CT, computed tomography; PI, pelvic incidence; PT, pelvic tilt.
- Table 2
Results of paired t test: comparison of spinopelvic parameters measured on x-ray and CT images.
Spinopelvic Parameters X-ray CT P Value Mean SD Mean SD Pelvic incidence 45.2 13.8 44.5 13.3 0.86 Pelvic tilt 10 6.7 8.2 5.7 0.52 Sacral slope 35.3 9.7 36.2 9.9 0.9 Abbreviations: CT, computed tomography.
Spinopelvic Parameters CT X-ray PI PT SS PI 0.99 0.745 0.924 PT 0.83 0.912 0.613 SS 0.884 0.474 0.932 Abbreviations: CT, computed tomography; PI, pelvic incidence; PT, pelvic tilt; SS, sacral slope.
Author Y N CT Mean Age, y Pelvic Incidence Participants Purpose Comparison Peleg21 2007 20 3D NA 57 Asymptomatic Search for sacral orientation None Vrtovec12 2012 370 3D 45.3 47.1 Emergency Data collection None Radcliff20 2013 164 2D 59 55 Nonorthopedic emergency Search for acetabular impingement None Weinberg23 2016 27 2D 59 56.1 Asymptomatic Search for acetabular impingement None Park13 2017 104 3D 62.8 57.7 Lumbar degenerative disease Search for position effect X-ray Sautet22 2018 150 2D 65.4 58.6 Nonorthopedic patients Search for acetabular orientation None Hasegawa14 2018 24 3D 60.1 57.7 Women with adult spinal deformity Search for position effect X-ray Chen7 2019 320 3D 46.2 45 Patients with acute abdominal disease Data collection None Baker10 2020 177 2D 50.1 49.1 Trauma Data collection None Present study 2020 33 2D 36 44.5 Asymptomatic volunteers Reliability validity X-ray Abbreviations: CT, computed tomography; 2D, 2-dimensional; 3D, 3-dimensional; NA, not available.
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