title: Imaging of posterior tibial tendon dysfunction--Comparison of high-resolution ultrasound and 3T MRI.
abstract: OBJECTIVE
  Posterior tibial tendon dysfunction is the most common cause of acquired asymmetric flatfoot deformity. The purpose of this study was to determine and compare the diagnostic value of MRI and high-resolution ultrasound (HR-US) in posterior tibial tendon dysfunction (PTTD), and assess their correlation with intraoperative findings.
  
  
  METHODS
  We reviewed 23 posterior tibial tendons in 23 patients with clinical findings of PTTD (13 females, 10 males; mean age, 50 years) with 18MHz HR-US and 3T MRI. Surgical intervention was performed in nine patients.
  
  
  RESULTS
  HR-US findings included 2 complete tears, 6 partial tears, 10 tendons with tendinosis, and 5 unremarkable tendons. MRI demonstrated 2 complete tears, 7 partial tears, 10 tendons with tendinosis, and 4 unremarkable tendons. HR-US and MRI were concordant in 20/23 cases (87%). Image findings for HR-US were confirmed in six of nine patients (66.7%) by intraoperative inspection, whereas imaging findings for MRI were concordant with five of nine cases (55.6%).
  
  
  CONCLUSIONS
  Our results indicate that HR-US can be considered slightly more accurate than MRI in the detection of PTTD.
authors.affiliation: Medical University of Vienna, Vienna General Hospital, Department of Biomedical Imaging and Image-guided Therapy, Währinger Gürtel 18-20, 1090 Vienna, Austria. Electronic address: michael.arnoldner@meduniwien.ac.at.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Arnoldner
authors.affiliation: Medical University of Vienna, Vienna General Hospital, Department of Biomedical Imaging and Image-guided Therapy, Währinger Gürtel 18-20, 1090 Vienna, Austria.
authors.forename: Michael
authors.initials: M
authors.lastname: Gruber
authors.affiliation: Medical University of Vienna, Vienna General Hospital, Department of Trauma-Surgery, Währinger Gürtel 18-20, 1090 Vienna, Austria.
authors.forename: Stefanie
authors.initials: S
authors.lastname: Syré
authors.affiliation: Foot & Ankle Centre Vienna, Alser Straße 43/8, 1080 Vienna, Austria.
authors.forename: Karl-Heinz
authors.initials: KH
authors.lastname: Kristen
authors.affiliation: Foot & Ankle Centre Vienna, Alser Straße 43/8, 1080 Vienna, Austria; Orthopaedic Hospital Vienna, Speisinger Straße 109, 1130 Vienna, Austria.
authors.forename: Hans-Jörg
authors.initials: HJ
authors.lastname: Trnka
authors.affiliation: Medical University of Vienna, Vienna General Hospital, Department of Biomedical Imaging and Image-guided Therapy, Währinger Gürtel 18-20, 1090 Vienna, Austria.
authors.forename: Franz
authors.initials: F
authors.lastname: Kainberger
authors.affiliation: Medical University of Vienna, Vienna General Hospital, Department of Biomedical Imaging and Image-guided Therapy, Währinger Gürtel 18-20, 1090 Vienna, Austria.
authors.forename: Gerd
authors.initials: G
authors.lastname: Bodner
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005528:Foot / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D037081:Posterior Tibial Tendon Dysfunction / Q000000981:diagnostic imaging* / Q000473:pathology*; D015203:Reproducibility of Results; D052256:Tendinopathy / Q000000981:diagnostic imaging / Q000473:pathology; D013710:Tendons / Q000000981:diagnostic imaging / Q000473:pathology; D014463:Ultrasonography
keywords: High-resolution ultrasound; Posterior tibial tendon