AXIAL STRESS DISTRIBUTIONS BETWEEN COAXIAL COMPRESSORS IN ELASTOGRAPHY - AN ANALYTICAL MODEL

We describe an analytical model to study the behavior of stress along the compression axis for different configurations of opposing circular compressors, as applied to elastography. The method is based on a hypothesis that the axial stress at any point on the axis is the superposition of the individual components of the stresses derived from the boundary conditions at either end. The determination of the axial stress behavior according to the model permits the correction of certain elastograms for depth-dependent stress. Experimental results have been presented to corroborate the model.