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Skeletal Radiology

, Volume 37, Issue 6, pp 519–526 | Cite as

High-resolution morphological and biochemical imaging of articular cartilage of the ankle joint at 3.0 T using a new dedicated phased array coil: in vivo reproducibility study

  • Goetz H. Welsch
  • Tallal C. Mamisch
  • Michael Weber
  • Wilhelm Horger
  • Klaus Bohndorf
  • Siegfried Trattnig
Scientific Article

Abstract

Objective

The objective of this study was to evaluate the feasibility and reproducibility of high-resolution magnetic resonance imaging (MRI) and quantitative T2 mapping of the talocrural cartilage within a clinically applicable scan time using a new dedicated ankle coil and high-field MRI.

Materials and methods

Ten healthy volunteers (mean age 32.4 years) underwent MRI of the ankle. As morphological sequences, proton density fat-suppressed turbo spin echo (PD-FS-TSE), as a reference, was compared with 3D true fast imaging with steady-state precession (TrueFISP). Furthermore, biochemical quantitative T2 imaging was prepared using a multi-echo spin-echo T2 approach. Data analysis was performed three times each by three different observers on sagittal slices, planned on the isotropic 3D-TrueFISP; as a morphological parameter, cartilage thickness was assessed and for T2 relaxation times, region-of-interest (ROI) evaluation was done. Reproducibility was determined as a coefficient of variation (CV) for each volunteer; averaged as root mean square (RMSA) given as a percentage; statistical evaluation was done using analysis of variance.

Results

Cartilage thickness of the talocrural joint showed significantly higher values for the 3D-TrueFISP (ranging from 1.07 to 1.14 mm) compared with the PD-FS-TSE (ranging from 0.74 to 0.99 mm); however, both morphological sequences showed comparable good results with RMSA of 7.1 to 8.5%. Regarding quantitative T2 mapping, measurements showed T2 relaxation times of about 54 ms with an excellent reproducibility (RMSA) ranging from 3.2 to 4.7%.

Conclusion

In our study the assessment of cartilage thickness and T2 relaxation times could be performed with high reproducibility in a clinically realizable scan time, demonstrating new possibilities for further investigations into patient groups.

Keywords

MRI Cartilage Ankle 3 T TrueFISP T2 mapping 

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Copyright information

© ISS 2008

Authors and Affiliations

  • Goetz H. Welsch
    • 1
  • Tallal C. Mamisch
    • 2
  • Michael Weber
    • 3
  • Wilhelm Horger
    • 4
  • Klaus Bohndorf
    • 5
  • Siegfried Trattnig
    • 1
  1. 1.MR Center, High field MR, Department of RadiologyMedical University of ViennaViennaAustria
  2. 2.Department of Orthopaedic SurgeryUniversity of BerneBerneSwitzerland
  3. 3.Medical Statistics, Department of RadiologyMedical University of ViennaViennaAustria
  4. 4.Siemens Medical SolutionsErlangenGermany
  5. 5.Department of RadiologyKlinikum AugsburgAugsburgGermany

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