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

• Published in: Clinical imaging Vol. 50; pp. 194 - 200
• Main Authors: Matcuk, George R., Price, Spencer E., Patel, Dakshesh B., White, Eric A., Cen, Steven
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.07.2018; Elsevier Limited
• Subjects: Acetabular labral tear; Acetabulum; Correlation analysis; Femoroacetabular impingement; Hip; Hip joint; Impingement; Injuries; Interobserver variability; Magnetic resonance arthrography; Medical imaging; Morphology; NMR; Nuclear magnetic resonance; Tearing; Variability; Acetabular labral tear; Interobserver variability; Hip; Magnetic resonance arthrography; Femoroacetabular impingement
• ISSN: 0899-7071; 1873-4499
• DOI: 10.1016/j.clinimag.2018.04.002

To evaluate the inter-rater agreement for description of labral tears and measures of femoroacetabular impingement (FAI) on 3 T hip MR arthrography. 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. 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). There is moderate inter-observer variability reporting labral tears and measures of FAI. •There is fair interrater agreement for acetabular labral tears and extent.•There is fair to excellent agreement for measures of femoroacetabular impingement.•Agreement is worse for measures of cam than to pincer morphology.