Diagnostic performance of direct traction MR arthrography of the hip: detection of chondral and labral lesions with arthroscopic comparison

• Published in: European radiology 2015-06, Vol.25 (6), p.1721-1730
• Main Authors: Schmaranzer, Florian, Klauser, Andrea, Kogler, Michael, Henninger, Benjamin, Forstner, Thomas, Reichkendler, Markus, Schmaranzer, Ehrenfried
• Format: Article
• Language: English
• Subjects: Adolescent; Adult; Arthritis; Arthrography - methods; Arthroscopy - methods; Bone surgery; Cartilage; Cartilage Diseases - pathology; Cartilage, Articular - pathology; Contrast agents; Contrast Media; Cysts; Diagnostic Radiology; Female; Hip Joint - pathology; Humans; Imaging; Injections, Intra-Articular; Internal Medicine; Interventional Radiology; Joint Diseases - pathology; Magnetic Resonance Imaging - methods; Male; Medicine; Medicine & Public Health; Middle Aged; Musculoskeletal; Neuroradiology; Osteoarthritis; Radiology; Retrospective Studies; Sensitivity and Specificity; Traction - methods; Ultrasound; Young Adult
• ISSN: 0938-7994; 1432-1084
• DOI: 10.1007/s00330-014-3534-x

Objectives To assess diagnostic performance of traction MR arthrography of the hip in detection and grading of chondral and labral lesions with arthroscopic comparison. Methods Seventy-five MR arthrograms obtained ± traction of 73 consecutive patients (mean age, 34.5 years; range, 14–54 years) who underwent arthroscopy were included. Traction technique included weight-adapted traction (15–23 kg), a supporting plate for the contralateral leg, and intra-articular injection of 18–27 ml (local anaesthetic and contrast agent). Patients reported on neuropraxia and on pain. Two blinded readers independently assessed femoroacetabular cartilage and labrum lesions which were correlated with arthroscopy. Interobserver agreement was calculated using κ values. Joint distraction ± traction was evaluated in consensus. Results No procedure had to be stopped. There were no cases of neuropraxia. Accuracy for detection of labral lesions was 92 %/93 %, 91 %/83 % for acetabular lesions, and 92 %/88 % for femoral cartilage lesions for reader 1/reader 2, respectively. Interobserver agreement was moderate (κ = 0.58) for grading of labrum lesions and substantial (κ = 0.7, κ = 0.68) for grading of acetabular and femoral cartilage lesions. Joint distraction was achieved in 72/75 and 14/75 hips with/without traction, respectively. Conclusion Traction MR arthrography safely enabled accurate detection and grading of labral and chondral lesions. Key Points • The used traction technique was well tolerated by most patients. • The used traction technique almost consistently achieved separation of cartilage layers. • Traction MR arthrography enabled accurate detection of chondral and labral lesions.