Measurements of the trapezius and erector spinae muscles using virtual touch imaging quantification ultrasound-Elastography: a cross section study

Background: This study uses virtual touch imaging quantification (VTIQ) technology for the first time to conduct measurements of the trapezius and erector spinae muscles in a large study population. The significance of various influencing factors, such as age and sex, are also examined. Method: The study population comprised 278 subjects. The Siemens Acuson S3000 and VTIQ technology were used for measurements of the trapezius and erector spinae muscles (Siemens Healthcare, Erlangen, Germany). Results: The following mean values +/- standard deviation were calculated: left trapezius: males 2.89 +/- 0.38 m/s, females 2.71 +/- 0.37 m/s; right trapezius: males 2.84 +/- 0.41 m/s, females 2.70 +/- 0.38 m/s; left erector spinae: males 2. 97 +/- 0.50 m/s, females 2.81 +/- 0.57 m/s; right erector spinae: males 3.00 +/- 0.52 m/s, females 2.77 +/- 0.59 m/s. A significant difference between male and female subjects was demonstrated both for the shear wave velocities of the trapezius and erector spinae as well as for the thickness of the trapezius muscle (p < 0.05). There was also a significant difference in muscle elasticity between subjects over 60 years of age and those under 60 (p < 0.05). Furthermore, the results indicate that regular physical activity has an effect on muscle elasticity. Conclusions: Our results demonstrate significantly different results between male and female subjects and between under-and over-sixty-year-old subjects. This means that sex-related and age-adapted considerations are obviously needed for further studies.