Three tesla magnetic resonance imaging of the anterior cruciate ligament of the knee: can we differentiate complete from partial tears?
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To determine the ability of 3.0T magnetic resonance (MR) imaging to identify partial tears of the anterior cruciate ligament (ACL) and to allow distinction of complete from partial ACL tears.
Materials and methods
One hundred seventy-two patients were prospectively studied by 3.0T MR imaging and arthroscopy in our institution. MR images were interpreted in consensus by two experienced reviewers, and the ACL was diagnosed as being normal, partially torn, or completely torn. Diagnostic accuracy of 3.0T MR for the detection of both complete and partial tears of the ACL was calculated using arthroscopy as the standard of reference.
There were 132 patients with an intact ACL, 17 had a partial, and 23 had a complete tear of the ACL seen at arthroscopy. Sensitivity, specificity, and accuracy of 3.0T MR for complete ACL tears were 83, 99, and 97%, respectively, and, for partial ACL tears, 77, 97, and 95%, respectively. Five of 40 ACL lesions (13%) could not correctly be identified as complete or partial ACL tears.
MR imaging at 3.0T represents a highly accurate method for identifying tears of the ACL. However, differentiation between complete and partial ACL tears and identification of partial tears of this ligament remains difficult, even at 3.0T.
KeywordsKnee ligaments Anterior cruciate ligament Knee injury Magnetic resonance imaging 3.OT
- 16.American Medical Association. Subcommittee on Classification of Sports Injuries and Committee on the Medical Aspects of Sports. Standard nomenclature of athletic injuries. Chicago: American Medical Asociation; 1968. p. 99–100.Google Scholar
- 18.McNally EG. Knee igaments. In: Vanhoenacker FM, Maas M, Gielen JL, editors. Imaging of orthopedic sports injuries. Berlin Heidelberg New York: Springer; 2007. p. 284–92.Google Scholar