А.N. Briko – Senior Lecturer, Department “Medical and Technical Information Technologies”,  Bauman Moscow State Technical University

Е-mail: briko@bmstu.ru

V.V. Kapravchuk – Student, Department “Medical and Technical Information Technologies”, 

Bauman Moscow State Technical University 

E-mail: 9784882@mail.ru

A.D. Parnovskaja – Student, Department “Medical and Technical Information Technologies”, 

Bauman Moscow State Technical University 

E-mail: a.parnovskaya@gmail.com

N.V. Seleznev – Post-graduate Student, Department “Medical and Technical Information Technologies”,  Bauman Moscow State Technical University

E-mail: seleznev.nv@bk.ru

S.I. Shchukin – Dr.Sc. (Eng.), Professor, Head of Department “Medical and Technical Information Technologies”, Bauman Moscow State Technical University

E-mail: schookin@mx.bmstu.ru

The purpose of the article was to evaluate the elastic properties of the skin-fat and muscle layers of the forearm. To study the relationship between forearm tissue deformations and applied pressure a special stand was developed, which allows positioning in the horizontal plane and vertical movement of the ultrasonic sensor in order to implement pressure, the value of which is recorded using force sensors. Using the stand, preliminary studies were carried out, in which iterative pressing of the sensor was performed, signals from force sensors were registered at each step of movement, signals from force sensors were registered at each step of movement, and ultrasound images of the internal anatomy of the volunteer's forearm at rest were obtained, corresponding to various degrees of pressure, carrying information about changes in the thickness of the muscles and the skin-fat layer due to pressing and their elasticity.

The obtained images were analyzed, after which experimental data on changes in the thickness of the skin-fat and muscle layers were approximated and the dependences of the change in the thickness of the internal media on the movement of the sensor were constructed.  It was found that the elasticity of the skin-fat layer is smaller than the elasticity of the muscle, since during implementation of pressure the skin-fat layer first becomes thinner, after which the muscle layer begins to thin. Based on the data obtained, the dependence of the contact force on the movement of the sensor was also built, which can be useful for determining the rheological properties of muscle tissue.

It was also found that in the analysis of the muscle elasticity parameters it is advisable to consider the range of pressure starting from the value corresponding to the gateway of thinning of the skin-fat layer to the plateau.

A stand was developed to evaluate the elasticity parameters of the forearm tissues, which makes it possible to study the dependence of deformations of the forearm tissues on pressure using ultrasound and force sensors, and also allows to control the location of the ultrasonic sensor over the area of interest and perform indentation iteratively.

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