Abstract #3182

Quantitative Assessment of Mechanical Ankle Laxity using MR Imaging

Christian Jrgen Seebauer¹, Jens Rump², Hermann Josef Bail³, Felix Gttler², Bernd Hamm², Ulf Teichgrber²

¹Center for Musculoskeletal Surgery, Charit-Universittsmedizin Berlin, Berlin, Germany; ²Department of Radiology, Charit-Universittsmedizin Berlin, Berlin, Germany; ³Department of Trauma & Orthopedic Surgery, Clinic Nuremberg, Nuremberg, Germany

To date, no reports document the advantages of the combination of MRI and stress examination in the assessment of mechanical ankle instability. In the present study an MR-compatible stress device was developed and tested for MR-safety. Bilateral MRI-stress examinations were performed on 50 volunteers, i.e. 35 healthy subjects (group A) and 15 athletes suffering from chronic ankle instability (group B). Both, the inversion test and the anterior drawer test were performed under axial, coronal, 45 para-axial and sagittal T2W FSE image control. MR images were assessed for the talar-tilt (TT), subtalar-tilt (STT), anterior-talus-translation (ATT), anterior-calcaneus-translation (ACT), lateral-talocalcaneal-translation (MTCT) and the ligaments of the lateral ankle (ATFL, CFL and PTFL).