Figure 1.

PDMS sample fabrication process. PDMS elastomer and curing agent were combined with carbon black. The mixture was poured into a petri dish to obtain a 2.5mm thickness layer. The mixture was then cured in the oven at designated temperature. The PDMS discs were made using a 5mm biopsy punches. The disc shape PDMS samples were embedded in the middle of the tissue mimicking phantom for strain imaging scans and mechanical testing. The tissue mimicking phantoms were about 2 cm thick.