Best Practices: Hip Femoroacetabular Impingement.

Schmaranzer, Florian; Kheterpal, Arvin B; Bredella, Miriam A (2021). Best Practices: Hip Femoroacetabular Impingement. American Journal of Roentgenology, 216(3), pp. 585-598. American Roentgen Ray Society 10.2214/AJR.20.22783

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OBJECTIVE. Imaging plays a critical role in the assessment of patients with femoroacetabular impingement (FAI). With better understanding of the underlying pathomechanics and advances in joint-preserving surgery, there is an increasing need to define the most appropriate imaging workup. The purpose of this article is to provide guidance on best practices for imaging of patients with FAI in light of recent advances in corrective FAI surgery. CONCLUSION. Pelvic radiography with dedicated hip projections is the basis of the diagnostic workup of patients with suspected FAI to assess arthritic changes and acetabular coverage and to screen for cam deformities. Chondrolabral lesions should be evaluated with unenhanced MRI or MR arthrography. The protocol should include a large-FOV fluid-sensitive sequence to exclude conditions that can mimic or coexist with FAI, radial imaging to accurately determine the presence of a cam deformity, and imaging of the distal femoral condyles for measurement of femoral torsion. CT remains a valuable tool for planning of complex surgical corrections. Advanced imaging, such as 3D simulation, biochemical MRI, and MR arthrography with application of leg traction, has great potential to improve surgical decision-making. Further research is needed to assess the added clinical value of these techniques.

Item Type:

Journal Article (Review Article)


04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery
04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic, Interventional and Paediatric Radiology

UniBE Contributor:

Schmaranzer, Florian


600 Technology > 610 Medicine & health




American Roentgen Ray Society




Maria de Fatima Henriques Bernardo

Date Deposited:

11 Feb 2021 08:51

Last Modified:

24 Feb 2021 09:55

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

MR arthrography MRI femoroacetabular impingement imaging workup radiography




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