Fig. 4From: “Simple mechanical devices did not improve pelvis positioning in AP pelvis radiographs for reliable assessment of the acetabular orientation”The pelvic orientation was exactly adjusted to the APP in all spatial planes. a Adjusted sagittal reconstruction. b Adjusted coronal reconstruction: this is the APP connecting the upper boarder of the pubic symphysis and the anterior facet of the superior anterior iliac spines. c Adjusted sagittal reconstruction. (purple line: adjusted coronal plane, APP; blue line: adjusted axial plane; yellow line: adjusted sagittal plane) d CT 3D reconstruction of a pelvic specimen adjusted to the APP (blue trapezoid)Back to article page