Diagram of model geometry and mesh: (a) coronal cross section, (b) isotropic view, and (c) finite element mesh.
Normalized modal frequencies as a function of compressibility and tissue region: (a) cover only, (b) body only, and (c) body and cover. Each curve normalized with the incompressible value as unity. (—–) mode 1; (---) mode 2; (-·-·-) mode 3; (·····) mode 4; (—) mode 5; (---) mode 6.
Planar displacement condition imposed in the body layer only: (a) modal frequencies as a function of stiffness ratio; (b) normalized modal frequencies with the planar displacement value as unity (mode 7 omitted). (—–) mode 1; (---) mode 2; (-·-·-) mode 3; (·····) mode 4; (—) mode 5; (---) mode 6; (-·-·-) mode 7.
Tissue types and independent parameters required for linear elastic descriptions. Measured human tissue parameters indicated in bold.
Geometric parameters of the body-cover model of Fig. 1.
Nominal material properties of the body-cover model. Measured parameters indicated in bold.
Parameter substitutions for parametric variation.
Discrepancies between incompressibility and partial compressibility for two values of compressibility factor.
Influence of stiffness ratio on the relative differences between constrained and unconstrained modal frequencies.
Summary of parameter reduction methods (measured properties indicated in bold).
Article metrics loading...
Full text loading...