Abstract
PurposeTo evaluate the reliability of the parameters for acetabular/femoral pathomorphologies in L-spine and hip radiographs compared to pelvic radiographs. MethodsA retrospective review of L-spine, hip, and pelvic radiographs from 101 patients was performed. Three radiologists independently measured five parameters (acetabular roof angle of Tönnis [Tönnis angle], center-edge-angle of Wiberg [CEA], femoral head extrusion index [FHEI], cross-over sign, pistol-grip deformity) in each radiograph. ResultsNo significant differences were identified (p ≥ 0.07) except Tönnis angles and FHEIs from the L-spine radiographs. Inter-radiograph/inter-reader ICCs were excellent or good. ConclusionPathomorphology-related measurements in L-spine radiographs can also be used as alternatives to those in pelvic or hip radiographs. If L-spine radiographs are already available, additional pelvic or hip radiographs may be unnecessary, thus reducing patients' overall radiation exposure.
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