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Information × Registration Number 0304U004195, 0103U004220 , R & D reports Title Investigation of local shifting disturbance in biological tissues phantoms popup.stage_title Теоретичні дослідження та розробка алгоритму обробки доплерівських даних Head Tovstjak V.V., Registration Date 26-03-2004 Organization Kharkov National University named after V.N.Karazin popup.description2 The purpose of the research work was theoretical ivestigation of induced shear mode deformation field space-time characteristics mapping methods and exploration of different mapping methods of viscoelastic features division. The local pulse disturbance in soft tissues and their relaxation processes dependence on viscoelastic tissue features was theoretically investigated. It was shown that viscosity related addition to shear deformation value when relaxation is defined by ratio of dynamic viscosity and shear modulus and it doesn't depend on observation point radial coordinate. There was proved the possibility of viscosity and elasticity separate representation with simultaneous increase of measuring precision of the latter. Mapping method with images normalization on primal shifts known spatial distribution was proposed and fulfilled. The method for Doppler measurements of shifts and their representation quality precision increase based on taking into account the features of ultrasound response in softtissues and physical features of speckle noises formation, and it's not directly connected to probing parameters optimisation. Product Description popup.authors popup.nrat_date 2020-04-02 Close