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MR elastography-based slip interface imaging (SII) for functional assessment of myofascial interfaces: A feasibility
Emi Hojo1, Yi Sui1, Xiang Shan1
1Department of Radiology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA.
Magnetic Resonance in Medicine
|March 25, 2024
Summary
MR elastography-based slip interface imaging (SII) visualizes myofascial mobility in healthy individuals. This technique shows potential for diagnosing myofascial pain syndrome by assessing changes in muscle tissue adhesion.
Area of Science:
- Biomedical Engineering
- Musculoskeletal Imaging
- Pain Research
Background:
- Abnormal myofascial adherence is a suspected factor in myofascial pain syndrome.
- Assessing myofascial mobility is crucial for understanding this condition.
Purpose of the Study:
- To evaluate the feasibility of MR elastography (MRE)-based slip interface imaging (SII).
- To visualize and quantify myofascial mobility in healthy volunteers.
Main Methods:
- SII was applied to the flexor digitorum profundus (FDP) and thigh muscles.
- Normalized octahedral shear strain (NOSS) maps were generated to visualize slip interfaces.
- Shear strain entropy was computed for knee flexion and extension positions.
Main Results:
- Distinct slip interfaces were visualized in the FDP.
- Clearer interfaces and higher NOSS entropy were observed in the vastus lateralis-vastus intermedius during knee extension.
- Optimal visualization occurs when muscles are not passively stretched.
Conclusions:
- MRE-based SII successfully visualizes and assesses myofascial interface mobility.
- This method provides a basis for future studies on myofascial pain syndrome.
