Pelvic rotation and tilt can cause misinterpretation of the acetabular index measured on radiographs.
van der Bom MJ
, Groote ME
, Vincken KL
, Beek FJ
, Bartels LW
Image Sciences Institute, Department of Radiology, University Medical Center Utrecht, Room Q0S.459, PO Box 85500, 3508 GA, Utrecht, The Netherlands. M.vanderBom@umcutrecht.nl
Radiographic diagnosis and followup studies of developmental dysplasia of the hip are commonly performed by measuring the acetabular index on radiographs using Hilgenreiner's method. The outcome of the measurement, however, depends on the orientation of the subject's pelvis relative to the xray source. The influence of pelvic rotation and tilt on the measurement error has been evaluated separately but not in combination.
PMID: 21318629 [PubMed - indexed for MEDLINE]