Femoroacetabular Impingement: Preoperative Planning and Postoperative MR Imaging Evaluation
Florian Schmaranzer1, Malin K Meier2, Reto Sutter3
1Faculty of Medicine, Department of Radiology, Balgrist University Hospital, University of Zürich, Forchstrasse 340, Zürich 8008, Switzerland; Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital University Hospital, University of Bern, Freiburgstrasse, Bern 3010, Switzerland.
Abstract:
Imaging plays a critical role in the preoperative and postoperative evaluation of patients with femoroacetabular impingement. Non-contrast MR imaging and direct magnetic resonance arthrography of the hip are the modalities of choice for the preoperative assessment of chondrolabral lesions. The MRI protocol should include radial images for detailed analysis of the cam deformity and fast sequences covering the pelvis and knee for measurement of femoral torsion. In patients with postoperative pain, a comprehensive analysis of residual deformities and signs of osseous overcorrection should be performed as they can cause residual impingement or iatrogenic instability.
