Complementary Acoustic Metamaterial for Penetrating Aberration Layers

Area of Science:

• Acoustic Metamaterials
• Biomedical Ultrasound Engineering
• Materials Science

Background:

• Traditional ultrasound couplants are limited to soft tissues and cannot penetrate bone.
• Ultrasound imaging is hindered by aberration layers, particularly bone, limiting diagnostic capabilities.
• Improving ultrasound transmission through bone is crucial for advanced medical imaging and therapies.

Purpose of the Study:

• To develop an impedance-matched acoustic metamaterial capable of enhancing ultrasound penetration through bone.
• To design and validate a novel phase-modulated complementary acoustic metamaterial for bone aberration correction.
• To investigate the efficacy of 3D-printed acoustic metamaterials for ultrasonic layer adjustment.

Main Methods:

• Utilizing the principle of impedance matching and equivalent parameter technology for acoustic metamaterial design.
• Employing phase-modulated complementary acoustic metamaterial principles.
• 3D printing for fabricating the bone matching layer.
• Numerical simulations and experimental validation in non-reflecting tanks.

Main Results:

• The proposed acoustic metamaterial successfully enables ultrasound penetration through bone.
• Optimal design of the bone matching layer for specific bone thickness and ultrasound probe frequencies was achieved.
• Experimental and simulation results confirmed improved ultrasound transmission efficiency through the aberration layer.

Conclusions:

• The developed acoustic metamaterial offers a significant advancement in overcoming bone-related ultrasound aberrations.
• This technology holds potential for enhanced ultrasound imaging and therapeutic applications involving bone.
• The study demonstrates the effectiveness of acoustic metamaterials for improving ultrasound transmission in challenging biological media.