Modeling of needle-tissue interaction using ultrasound-based motion estimation

Area of Science:

• Medical Simulation
• Biomechanical Modeling
• Medical Imaging

Background:

• Accurate needle-tissue interaction models are crucial for realistic needle insertion simulators.
• Current modeling techniques often require invasive measurements or complex setups.
• Developing non-invasive methods is key to advancing simulation fidelity.

Purpose of the Study:

• To introduce a new experimental method for modeling needle-tissue interaction.
• To demonstrate the feasibility of a non-invasive approach using ultrasound and force measurements.
• To identify parameters for a needle-tissue interaction model through deformation simulation.

Main Methods:

• Measuring needle and tissue displacements using ultrasound (radio-frequency data and cross-correlation).
• Measuring needle base forces during insertion.
• Utilizing a deformation simulation model and finite element analysis to identify model parameters.

Main Results:

• Successfully demonstrated a non-invasive method for modeling needle-tissue interaction.
• Generated tissue displacement fields using ultrasound elastography techniques.
• Achieved a good fit between simulated and measured data by adjusting model parameters.

Conclusions:

• The presented experimental method offers a feasible and non-invasive approach to modeling needle-tissue interaction.
• This technique can enhance the realism and accuracy of needle insertion simulators.
• The integration of ultrasound and force data provides valuable insights into biomechanical responses during needle insertion.