Quantitative Imaging of Young’s Modulus of Soft Tissues from Ultrasound Water Jet Indentation: A Finite Element Study

Figure 1

Diagram of the noncontact ultrasound indentation system. The 3D translating device facilitated the system to move easily and monitor the deformation of the phantom. Water flowed from the water pipe and water jet was used as an indenter. Focused high-frequency ultrasound was transmitted through water. The central square region, including a long water pipe, a bubbler, a nozzle, and the soft phantom, was modeled in ANSYS WORKBENCH (see Figure 2). Pressure sensor was located 60 mm from the middle of the bubbler. The dimensions of the important components are: nozzle diameter 1.7 mm, water supply pipe diameter 2 mm, the height of nozzle is 8.5 mm and the distance from the nozzle to tissue approximately 0.95 mm.