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Updated: Jun 28, 2025
Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
Published on: December 18, 2016
Quantifying Tendon Degeneration Using Magic Angle Insensitive Ultra-Short Echo Time Magnetization Transfer: A Phantom
Georg C Feuerriegel1, Adrian A Marth, Sophia S Goller
1From the Department of Radiology, Balgrist University Hospital, Faculty of Medicine, University of Zurich, Zurich, Switzerland (G.C.F., A.A.M., S.S.G., R.S.); Swiss Center for Musculoskeletal Imaging, Balgrist Campus, Zurich, Switzerland (A.A.M., S.S.); University of Zurich, Institute of Veterinary Pathology, Laboratory for Animal Pathology, Zurich, Switzerland (M.H.); and Advanced Clinical Imaging Technology, Siemens Healthineers International AG, Zurich, Switzerland (S.S.).
Ultra-short echo time magnetization transfer (MT) imaging reliably quantifies tendon degeneration. This robust method is insensitive to magnetic angle effects and feasible for clinical use.
Area of Science:
- Biomedical Engineering
- Musculoskeletal Imaging
- Biomaterials Science
Background:
- Collagen degradation significantly alters tendon mechanical properties.
- Accurate assessment of tendon degeneration is crucial for diagnosing and managing musculoskeletal injuries.
- Current imaging techniques may face limitations in quantifying subtle changes in tendon structure.
Purpose of the Study:
- To evaluate the effectiveness of 3D ultra-short echo time (UTE) magnetization transfer (MT) imaging in assessing collagen degradation in bovine flexor tendons.
- To compare the quantitative capabilities of UTE MT imaging with UTE T2* imaging.
- To determine the robustness of UTE MT imaging to varying angles relative to the static magnetic field (B0).
Main Methods:
- Eight bovine flexor tendons underwent 3D UTE MT and UTE T2* MRI at 3T.
- Tendons were divided into control and collagenase-treated groups to induce degeneration.
- Imaging was performed at multiple angles (0, 27, 55, 90 degrees) to the B0 field before and after degradation.
Main Results:
- UTE MT imaging demonstrated significantly lower variability (9.64%-11.25%) compared to UTE T2* (18.81%-24.06%), indicating superior robustness.
- UTE MT imaging showed a higher area under the curve (0.918 vs. 0.865) in detecting degeneration compared to UTE T2*.
- UTE MT values remained stable across different angles, unlike UTE T2* which showed inaccuracies at 55 degrees.
Conclusions:
- 3D UTE MT imaging is a reliable and robust method for quantifying tendon degeneration.
- The technique is insensitive to magnetic angle effects, a common artifact in MRI.
- UTE MT imaging can be acquired within clinically feasible timeframes, making it suitable for clinical application.
