Contrast-Enhanced Structured Illumination Ultrasound Imaging (CE-SIU)

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Acoustics

Background:

• Super-resolution ultrasound (SRUS) imaging visualizes microvascular blood flow using contrast agents.
• Current SRUS methods like Ultrasound Localization Microscopy (ULM) rely on post-image processing and long-term accumulation.
• Optical super-resolution techniques utilize structured illumination, inspiring new approaches in ultrasound.

Purpose of the Study:

• To develop a novel SRUS strategy using structured acoustic field illumination.
• To overcome the lateral resolution limitations of existing contrast-enhanced ultrasound imaging.
• To introduce a new technical route for SRUS development.

Main Methods:

• Designed a new structured acoustic field illumination method using an improved Gerchberg-Saxton Algorithm based on the Talbot effect.
• Developed an adaptive reconstruction strategy for any structured illumination method.
• Integrated structured illumination with contrast-enhanced imaging and post-processing to create CE-SIU.

Main Results:

• Achieved a two-dimensional structured acoustic field design.
• Demonstrated a reconstructed image frame rate comparable to multi-angle plane wave imaging.
• Reduced the full width at half maximum (FWHM) of the microbubble point spread function (PSF), enhancing lateral resolution.

Conclusions:

• The proposed structured acoustic field design strategy offers a new perspective for SRUS.
• CE-SIU successfully breaks through the lateral resolution limit of contrast-enhanced imaging.
• This work provides foundational insights for advancing SRUS technology.