Abstract #1557

Assessing lower back myofascial interface mobility using MR elastography-based slip interface imaging (SII)

Emi Hojo¹, Yi Sui¹, Xiang Shan¹, Keni Zheng¹, Phillip Rossman¹, Tim Waters¹, Armando Manduca², Garret M. Powell¹, Kai-Nan An³, Kristin D. Zhao⁴, Brent A. Bauer⁵, Richard L. Ehman¹, and Ziying Yin¹

¹Radiology, Mayo Clinic, Rochester, MN, United States, ²Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, United States, ³Orthopedics Research, Mayo Clinic, Rochester, MN, United States, ⁴Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN, United States, ⁵General Internal Medicine, Mayo Clinic, Rochester, MN, United States

Synopsis

Keywords: Other Musculoskeletal, Elastography, slip interface imaging, myofascial tissue, myofascial mobility, muscle, muscle function

Motivation: Investigating abnormal myofascial adhesion is crucial for understanding chronic low back pain in myofascial pain syndrome (MPS), necessitating objective, non-invasive imaging methods to characterize myofascial mobility in the lower back.

Goal(s): To evaluate the efficacy of MR-Elastography (MRE)-based slip interface imaging (SII) technique for visualizing myofascial mobility in the lower back of healthy volunteers.

Approach: A custom-built MRE driver and a new SII biomarker (D_norm) were introduced for detecting slip interfaces across thoracolumbar fascia and inter-muscular myofascial interfaces.

Results: The D_norm map at a lower MRE frequency successfully provided clear visualization of lumbar slip interfaces, indicating unrestricted mobility in healthy volunteers.

Impact: The new SII biomarker enhances visualization of the interface mobility in thoracolumbar fascia and other inter-muscular interfaces in the lower back. This may benefit assessment of myofascial mobility differences between healthy individuals and patients with MPS.

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