Abstract #2699

Stiffness change of the rotator cuff muscle before and after the tendon tear with magnetic resonance elastography and ultrasound elastography.

Akihisa Koga¹, Yoshiaki Itoigawa¹, Mikio Suga², Yuri Suganuma³, Tomoki Wada¹, Daichi Morikawa¹, Yuichiro Maruyama¹, and Kazuo Kaneko⁴

¹Orthopaedic surgery, Juntendo Urayasu Hospital, Chiba, Japan, ²Center for Frontier Medical Engineering, Chiba University, Chiba, Japan, ³Graduate School of Science and Engineering, Chiba University, Chiba, Japan, ⁴Orthopaedic surgery, Juntendo University, Tokyo, Japan

The purpose of this study was to explore the feasibility of Magnetic Resonance Elastography (MRE) measurement for quantification of the stiffness change of the shoulder rotator cuff muscle compared with Shear Wave ultrasound Elastography (SWE). Six porcine shoulders were used in this study. MRE and SWE measurement of the rotator cuff muscle was performed before and after the rotator cuff tendon detachment. Stiffness values were significantly lower after the tendon detachment in both MRE and SWE measurements (p<0.05). This result suggests that MRE could be a feasible method for quantification of the rotator cuff muscle stiffness as well as SWE.

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