Acetabular labral tear description and measures of pincer and cam-type femoroacetabular impingement and interobserver variability on 3 T MR arthrograms

Clin Imaging. 2018 Jul-Aug:50:194-200. doi: 10.1016/j.clinimag.2018.04.002. Epub 2018 Apr 6.

Abstract

Purpose: To evaluate the inter-rater agreement for description of labral tears and measures of femoroacetabular impingement (FAI) on 3 T hip MR arthrography.

Materials and methods: 53 hip MR arthrograms were reviewed by three musculoskeletal radiologists. Labral tears were described (Czerny classification) with extents recorded. Cam- and pincer-type FAI measures were performed. Intraclass correlation (ICC) and kappa statistic (κ) assessed inter-observer agreement.

Results: There was fair agreement for labral tear description (κ = 0.25-0.39) and for alpha angles (ICC = 0.54), and fair to excellent agreement for other measures of FAI (ICC = 0.51-0.90).

Conclusion: There is moderate inter-observer variability reporting labral tears and measures of FAI.

Keywords: Acetabular labral tear; Femoroacetabular impingement; Hip; Interobserver variability; Magnetic resonance arthrography.

Publication types

  • Evaluation Study

MeSH terms

  • Acetabulum / diagnostic imaging
  • Acetabulum / injuries
  • Acetabulum / pathology*
  • Adolescent
  • Adult
  • Arthrography / methods*
  • Cartilage Diseases / diagnostic imaging*
  • Cartilage, Articular / diagnostic imaging
  • Cartilage, Articular / injuries*
  • Female
  • Femoracetabular Impingement / diagnostic imaging*
  • Hip / diagnostic imaging
  • Humans
  • Lacerations / diagnostic imaging
  • Magnetic Resonance Imaging / methods*
  • Male
  • Middle Aged
  • Observer Variation
  • Pelvis / diagnostic imaging
  • Radiologists
  • Retrospective Studies
  • Rupture / diagnostic imaging
  • Young Adult