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AP pelvis
2%
118/7083
Inlet
5%
376/7083
Outlet
3%
220/7083
Frog lateral
6%
392/7083
False profile
84%
5951/7083
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The False profile view (also known as Faux profil) is performed with the patient standing with the affected hip on the cassette, the ipsilateral foot parallel to the cassette and the pelvis rotated 65° from the plane of the cassette. It can be used to assess anterior coverage of the femoral head for patients with hip dysplasia (DDH) and FAI. Chosa et al developed the anterior acetabular head index (AAHI) on false profile radiographs to assess anterior acetabular coverage and found a correlation between AAHI and vertical-center-anterior (VCA) angle when reviewing 250 patients. Sakai et al used three-dimensional (3-D) computed tomography (CT) to evaluate the vertical-center angle in 100 hips without osteoarthritic changes. They found that the anterior point of the VCA angle accurately defined the foremost aspect of the acetabulum in normal hips, but questioned the accuracy of its use in hips with dysplasia. Illustration A demonstrates the technique for obtaining a false profile view and a representative radiograph.
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