Focused ultrasound simulation through cortical bone by finite element method.

Area of Science:

• Biomedical Engineering
• Materials Science
• Acoustics

Background:

• Bone tissue exhibits adaptive and self-repairing capabilities.
• Ultrasound is increasingly used for diagnosing bone conditions.
• Computational simulations are vital for optimizing clinical applications in bone research.

Purpose of the Study:

• To analyze ultrasound wave propagation in cortical bone using the finite element method.
• To validate computational models against analytical solutions for wave propagation.
• To calculate attenuation coefficients for bone and muscle tissue.

Main Methods:

• Analytical solution of the Helmholtz equation for wave propagation.
• Finite element method (FEM) simulation using COMSOL Multiphysics.
• Establishment of a cylindrical bone sample geometry and use of the "Pressure Acoustic, Frequency Domain" module with a fine mesh.

Main Results:

• The simulation accurately reflects the behavior of acoustic pressure waves in bone samples, consistent with analytical solutions.
• Attenuation coefficients were calculated for biological materials like bone and muscle.
• The study demonstrates the utility of simulation methods for analyzing adjustable parameters.

Conclusions:

• Finite element analysis is a valuable tool for understanding ultrasound wave propagation in cortical bone.
• Computational simulations can optimize resource allocation and enhance problem-solving in biomedical research.
• This approach aids in the development of new diagnostic and therapeutic ultrasound devices for bone.