Subsurface elastic properties are essentially important for reservoir characterizations. Reconstructing multiple physical parameters suffers from a series of difficulties including cycle-skipping and parameter crosstalk difficulties. Density structures are very important to characterize fluid reservoirs but remain to be poorly constrained, which may be caused by weak sensitivity to travel time and strong contaminations from velocity parameters. In this paper, we first give the scattering patterns of isotropic-elastic parameters in different parameterizations, which help understand the coupling effects between different physical parameters. In the numerical modeling section, we first give example illustrating the difficulty of recovering density. We then focus on studying the interparameter contaminations of isotropic-elastic parameters with different parameterizations.