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- Title
Reliability and diagnostic accuracy of qualitative evaluation of diffusion-weighted MRI combined with conventional MRI in differentiating between complete and partial anterior cruciate ligament tears.
- Authors
Delin, Cyrille; Silvera, Stéphane; Coste, Joël; Thelen, Philippe; Lefevre, Nicolas; Ehkirch, François-Paul; Couls, Vincent; Oudjit, Ammar; Radier, Catherine; Legmann, Paul
- Abstract
Objectives: To assess the reliability and diagnostic accuracy of qualitative evaluation of apparent diffusion coefficient (ADC) mapping with magnetic resonance imaging (MRI) in differentiating between complete and partial anterior cruciate ligament (ACL) tears. Methods: This prospective study protocol was approved by the institutional ethics review board and informed consent was obtained from all the patients. Eighty-five patients (35 women and 50 men, mean age 34.1 years) with recent (<4 months) knee trauma with suspected ACL injury underwent conventional MRI (T1-weighted and T2-weighted sequences with fat saturation) associated with ADC mapping. MR images were read qualitatively without and then with ADC mapping by three radiologists, with analysis of direct signs of a traumatic ACL tear and a second-reading. Dynamic X-rays (43 patients) or arthroscopies (42 patients) were used as reference standards. Results: For complete ACL tear diagnosis (67 patients), sensitivity and specificity were 87% and 50% respectively with conventional MRI, and 96% and 94% respectively with ADC mapping ( P < 0.01 for specificity). Inter-observer correlations between musculoskeletal radiologists were almost perfect (κ = 0.81) with ADC mapping and fair with conventional MRI on the second-reading. Conclusions: ADC mapping associated with conventional MR sequences is a reproducible method to better differentiate complete and partial ACL tears. Key Points: • MRI is widely used for assessing the problematic knee • Additional diffusion-weighted sequences help differentiate between complete and partial ACL tears • DW-MRI for ACL requires a reader-dependent learning curve • Reliable visualisation of complete ACL tears allows more appropriate management of patients
- Subjects
QUALITATIVE research; MAGNETIC resonance imaging; ANTERIOR cruciate ligament; ANTERIOR cruciate ligament injuries; KNEE injuries; ARTHROSCOPES
- Publication
European Radiology, 2013, Vol 23, Issue 3, p845
- ISSN
0938-7994
- Publication type
Article
- DOI
10.1007/s00330-012-2633-9