Designing of a realistic tissue mimicking-elastography phantom

Anna Morr, Heiko Tzschätzsch, Felix Schrank, Helge Herthum, Jürgen Braun, Ingolf Sack

Viscoelastic properties of commercially available tissue-mimicking elastography phantoms are different from those of human soft tissue. Therefore, we aim to design an elastography phantom which viscoelastic properties over a wide frequency range are similar to in vivo human liver. Polyacrylamide serves as the base of thesephantoms and varying the concentration of the contents can influence its viscoelastic properties. To determine the shear wave speed and shear wave damping of this new phantom, different techniques as rheometry, tabletop magnetic resonance elastography (MRE) and human MRE are used.