Clinical Orthopaedics and Related Research · 2012 · 167 citations · 15 references
A crossover sign is frequently present on well-positioned AP pelvis radiographs in the absence of acetabular retroversion. Variable AIIS morphology may explain the appearance of this sign in the presence or absence of acetabular retroversion.
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Ischial Spine Projection into the Pelvis
Fabian Kalberer, Rafael J. Sierra, Sanjeev Madan et al. · Clinical Orthopaedics and Related Research · 2008 · 330 citations · Full text
Noninvasive three‐dimensional assessment of femoroacetabular impingement
Moritz Tannast, M. Kubiak-Langer, Frank Langlotz et al. · Journal of Orthopaedic Research® · 2006 · 255 citations