THEORETICAL-ANALYSIS AND VERIFICATION OF ULTRASOUND DISPLACEMENT AND STRAIN IMAGING

Evaluation of internal displacement and strain distributions in tissue under externally applied forces is a necessary step in elasticity ima ging. To obtain a quantitative image of the elastic modulus, strain an d displacement fields must be measured with reasonable accuracy and in verted based on an accurate theoretical model of soft tissue mechanics . In this paper, results of measured internal strain and displacement fields from gel-based phantoms are compared with theoretical predictio ns of a linear elastic model. In addition, some aspects of elasticity reconstruction based on measured displacement and strain fields are di scussed.