Towards Dynamic Contrast Specific Ultrasound Tomography

Area of Science:

• Medical Imaging
• Ultrasound Technology
• Biomedical Engineering

Background:

• Standard ultrasound tomography relies on sound speed and attenuation, limiting contrast agent specificity.
• Existing echo-contrast methods for breast imaging can be time-consuming and operator-dependent.
• There is a need for advanced imaging techniques to accurately assess contrast agent kinetics in breast tissue.

Purpose of the Study:

• To demonstrate the capability of cumulative phase delay imaging (CPDI) for imaging and quantifying ultrasound contrast agent (UCA) kinetics.
• To introduce dynamic contrast-specific ultrasound tomography (DCS-UST) as a novel, contrast agent-specific imaging modality.
• To evaluate the potential of DCS-UST for breast cancer diagnosis and multi-parametric ultrasound tomography.

Main Methods:

• Development and application of cumulative phase delay imaging (CPDI), a novel contrast-enhanced ultrasound technique.
• Utilizing a marker specific to UCAs for dynamic contrast-specific ultrasound tomography (DCS-UST).
• Investigating the relationship between cumulative phase delay (CPD) values and ultrasound second-harmonic intensity.

Main Results:

• CPDI successfully images and quantifies UCA kinetics, forming the basis for DCS-UST.
• A strong linear correlation was observed between CPD values and ultrasound second-harmonic intensity (R² = 0.87).
• DCS-UST offers a more practical, faster, and less operator-dependent procedure for breast imaging compared to standard methods.

Conclusions:

• DCS-UST, enabled by CPDI, provides accurate imaging of contrast kinetics specific to UCAs.
• This technology promises improved efficiency and reduced operator dependency in breast ultrasound imaging.
• DCS-UST holds significant potential as a diagnostic tool for breast cancer localization and multi-parametric breast ultrasound.