Research on the second-harmonic focused ultrasonic device based on micro-bubble contrast agents

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Acoustics

Background:

• Non-invasive diagnostic methods are crucial in modern medicine.
• Ultrasound contrast agents and their nonlinear response are key areas in ultrasound imaging research.
• Weak second-harmonic intensity is a limitation in current ultrasound imaging systems.

Purpose of the Study:

• To develop a second-harmonic focused ultrasonic device utilizing micro-bubble contrast agents.
• To overcome the challenge of weak second-harmonic intensity in ultrasound imaging.
• To enhance lateral resolution and signal-to-noise ratio in ultrasound imaging.

Main Methods:

• Designed a specialized resin plate with a periodic array of circular holes.
• Encapsulated micro-bubble contrast agents within the circular holes using thin resin tape.
• Theoretically analyzed and experimentally validated the device's functional mechanism.

Main Results:

• The developed device successfully generates a stronger second-harmonic signal.
• Second-harmonic ultrasound imaging achieved higher lateral resolution compared to conventional systems.
• The signal-to-noise ratio was significantly improved with the new device.

Conclusions:

• The novel second-harmonic focused ultrasonic device effectively enhances ultrasound imaging capabilities.
• This technology offers improved diagnostic accuracy through better resolution and signal quality.
• The device represents a significant advancement in non-invasive medical imaging using ultrasound contrast agents.