fig6

Figure 6. Ultrasound contrast application of the metagel film. (A) Schematic of a metagel conformally attached to soft tissue via an adhesion layer, enabling high-contrast imaging through dual-frequency excitation; (B) Photograph of the metagel film adhering to soft tissue; (C) Adhesion strength between the adhesion layer and the metagel film, and between the adhesion layer and tissue. Data are represented as mean value ± SD (standard deviation). Three independent tests were conducted (n = 3); (D) Dual-frequency differential imaging of the metagel film conformally adhered to various curved surfaces; (E) Dual-frequency differential imaging of the metagel film adhered to ex vivo tissue containing both soft and hard components.