Abstract: A method and device for non-invasive acoustic testing of elasticity of soft iological tissues, wherein a tangential oscillatory deformation is induced on the surface of a tissue being tested and only those oscillations, out of all resulting oscillations are measured, which occur in the direction of the induced deformation, and wherein a Young's modulus for the direction and anisotropic characteristics of the elasticity of tissue being tested are determined from a characteristic of those oscillations.
Type:
Grant
Filed:
May 22, 1990
Date of Patent:
May 26, 1992
Assignees:
Institute of General and Physical Chemistry, Institute for Biological Physics of the USSR Academy of Science
Inventors:
Goran Popovic, Armen Sarvazyan, Viktor Ponomarjev, Dusan Vucelic
Abstract: In a method and device for the non-invasive acoustic testing of the elastty of soft biological tissues for the diagnosing of physiological and pathological state in humans and animals, tangential oscillatory deformations of the frequency range of 0.5-30 kHz are excited on the surface of a tissue, and a velocity of the excited surface wave propagating along the vector of the initial displacement is determined. The device includes a probe with one transmitting and two receiving piezotransducers equipped with contact tips and mounted to the body of the probe by elongated shafts which serve as acoustic delay lines, and an electronic device which forms pulses to excite the transmitting transducer, processes the received acoustic signals, measures the time-of-flight of acoustic pulses from the transmitting transducer to the receiving transducers, converts it into the velocity of surface wave and displays the value of the velocity.
Type:
Grant
Filed:
August 18, 1988
Date of Patent:
August 14, 1990
Assignees:
Institute for Physical Chemistry, Institute for Biological Physics of the USSR Academy of Science
Inventors:
Armen P. Sarvazyan, Viktor Ponomarjev, Dusan Vucelic, Goran Popovic, Akiva Veksler