Shear wave elastography of the knee menisci

Objective To determine the ability of shear wave elastography to measure the stiffness of the knee menisci in healthy adults. Methods This observational cross-sectional study evaluated knee joints in healthy adults. Shear wave elastography was used to evaluate the anterior horn of the medial menisci bilaterally. The correlations between the mean elasticity bilaterally and age, weight, height and body mass index (BMI) were calculated using Pearson's correlation coefficient test. Results A total of 34 knee joints in 17 healthy subjects were evaluated. The mean +/- SD shear elastic modulus of the anterior horn of the right medial meniscus was 24.86 +/- 6.35 kPa and of the anterior horn of the left medial meniscus was 23.86 +/- 4.49 kPa. A significant inverse correlation was observed between the right medial meniscus elasticity and height. Other demographic factors showed no significant relationship to the anterior horn of the right medial meniscus elasticity. A significant inverse correlation was observed between the anterior horn of the left medial meniscus elasticity and age, while a significant positive correlation was observed between left medial meniscus elasticity and BMI. Conclusion These preliminary results suggest that shear wave elastography could be a potential tool to aid in studying the stiffness of the knee menisci.