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Fig. 3 | Journal of Experimental Orthopaedics

Fig. 3

From: “Simple mechanical devices did not improve pelvis positioning in AP pelvis radiographs for reliable assessment of the acetabular orientation”

Fig. 3

AP pelvis radiographs of the same cadaveric pelvic specimen with: a positioning I, b positioning II, c positioning III (ISS: ischial spine sign; COS: cross-over sign; a, bold blue line: vertical distance between the upper boarder of the symphysis and the sacrococcygeal joint; b, bold red line: horizontal distance between the midpoint of the symphysis and the midpoint of the sacrococcygeal joint; c, bold yellow line: vertical distance between the upper boarder of the symphysis and the tip of the coccyx; d, bold green line: vertical distance between the upper boarder of the symphysis and a line connecting the lower ends of the sacroiliac joints; e, bold purple line: horizontal diameter of the pelvic foramen; f, bold white line: vertical diameter of the obturator foramen; g, bold brown line: horizontal diameter of the obturator foramen)

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