METHOD AND DEVICE FOR QUANTITATIVE EVALUATION OF MEDIUM VISCOUS ELASTICITY Russian patent published in 2021 - IPC A61B8/08 G01N11/16 G06T7/40 

FIELD: medical technology.

SUBSTANCE: group of inventions relates namely to a method for quantifying the viscoelasticity of a medium and two variants of a device for quantifying the viscoelasticity of a medium. The method comprises the following stage of constructing (11) a space-time graph of vibration propagation after vibration excitation of the medium. The method has the step of projecting (12) an angle along each angle within a predetermined range of angles on the space-time graph and determining the slope of the space-time graph corresponding to the angle with the maximum signal energy. Determining the slope involves calculating integrals along each angle within a specified range of angles on a time-space plot. Slope definition has the definition of the angle with the greatest integral value as the slope angle of the slope line of the space-time plot. Determining the slope involves determining the slope of the slope line using the slope angle and obtaining (13) the viscoelasticity parameter of the medium in accordance with the slope. In the first version, the device contains an image forming module (41) configured to construct a space-time graph of vibration propagation after vibration excitation of the medium. The device has a determining module (42) configured to project an angle along each angle within a predetermined range of angles on a space-time graph and determine the slope of the space-time graph corresponding to the corner with maximum signal energy, containing an auxiliary calculation module (421) made with the ability to calculate integrals on a space-time graph along each angle within a specified range of angles. The device includes an auxiliary determining module (422), configured to determine the angle with the greatest value of the integral calculated by the auxiliary calculation module as the slope angle of the slope line of the space-time graph; and determining the draft angle of the draft line using the draft angle. The device has a quantification module (43) adapted to obtain the viscoelasticity parameter of the medium in accordance with the slope. In the second version, the device contains a memory (71), which stores instructions for performing the method. The device has a processor (72) configured to read instructions for constructing a space-time graph of vibration propagation after vibration excitation of the medium. The processor (72) is configured to read instructions for performing angle projection along each angle within a predetermined range of angles on the space-time graph and determining the slope of the space-time graph corresponding to the angle with the maximum signal energy. The processor (72) is configured to obtain the viscoelasticity parameter of the medium in accordance with the slope.

EFFECT: efficient and accurate implementation of a quantitative assessment of the viscoelasticity of the medium.

11 cl, 7 dwg