Ultrasound-transparent neural interfaces for multimodal interaction.

Area of Science:

• Neuroscience
• Biotechnology
• Medical Devices

Background:

• Neural interfaces are crucial for neuroscience and neurotechnology.
• Functional ultrasound imaging (fUSI) offers high-resolution brain monitoring.
• Existing microelectrodes hinder fUSI compatibility due to ultrasound impedance.

Purpose of the Study:

• To create flexible neural interfaces transparent to ultrasound.
• To enable seamless integration of diagnostic and therapeutic functionalities.
• To advance multimodal neural interfaces for research and clinical applications.

Main Methods:

• Developed a theoretical and simulation framework to assess acoustic transparency of polymers and metals.
• Proposed design guidelines for maximizing ultrasound transmission in soft neural interfaces.
• Experimentally validated acoustic transparency using immersion tests, phantom studies, and in vivo fUSI.

Main Results:

• Demonstrated flexible neural interfaces with high acoustic transparency.
• Validated the effectiveness of the proposed design guidelines.
• Confirmed compatibility with functional ultrasound imaging (fUSI) in phantom and in vivo settings.

Conclusions:

• Established a foundation for multimodal neural interfaces combining diagnostics and therapeutics.
• Paved the way for enhanced scientific discovery and translational impact in neurotechnology.
• Highlighted potential for extension to therapeutic focused ultrasound (FUS).