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© 2008 by the American Institute of Ultrasound in Medicine
J Ultrasound Med 27:1145-1152 • 0278-4297

Comparison of Sonography and Magnetic Resonance Imaging for Spring Ligament Abnormalities

Preliminary Study

Srinivasan Harish, MB, BS, FRCPC, Dinesh Kumbhare, MD, FRCPC, John O’Neill, MB, BCh, FRCR and Terry Popowich, BSc, RDMS

Departments of Diagnostic Imaging (S.H., J.O., T.P.) and Physical Medicine and Rehabilitation (D.K.), St Joseph’s Healthcare, Hamilton, Ontario, Canada; and Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada (S.H., D.K., J.O.).

Address correspondence to Srinivasan Harish, MB, BS, FRCPC, Department of Diagnostic Imaging, St Joseph’s Healthcare, Hamilton, ON L8N 4A6, Canada. E-mail: sriniharish{at}gmail.com

Objective. The purpose of this study was to determine whether sonography is as accurate as magnetic resonance (MR) imaging for depicting abnormalities of the spring ligament in patients with symptomatic posterior tibial tendon (PTT) dysfunction. Methods. Sixteen patients (18 ligaments) with symptomatic PTT dysfunction were prospectively evaluated with sonography and MR imaging. Results. Magnetic resonance imaging showed spring ligament tears in 8 of 18 feet, including 6 incomplete tears and 2 complete tears. Sonography showed spring ligament tears in 7 of 18 feet, including 6 incomplete tears and 1 complete tear. The findings of sonography and MR imaging were concordant in 17 of 18 feet (94%). Six of the 8 spring ligament tears on MR imaging were associated with posterior tibial tendinosis or tears. Conclusions. Sonography is an effective imaging option in assessing spring ligament abnormalities in patients with symptomatic PTT dysfunction.

Key Words: foot • magnetic resonance imaging • sonography • spring ligament

Abbreviations: FOV, field of view • FSE, fast spin echo • MR, magnetic resonance • PD, proton density • PTT, posterior tibial tendon • SMSL, superomedial part of the spring ligament • ST, slice thickness • TE, echo time • TR, repetition time

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Copyright © 2008 by the American Institute of Ultrasound in Medicine.