A novel method to obtain modulus image of soft tissues using water jet compression

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Acoustics

Background:

• Tissue stiffness is a key indicator of pathological changes.
• Ultrasound indentation is a technique for evaluating soft tissue mechanical properties.
• Conventional ultrasound indentation uses rigid transducers, limiting its application.

Purpose of the Study:

• To introduce a novel ultrasound indentation system utilizing water jet compression.
• To assess the mechanical properties of soft tissues with high resolution.
• To enable rapid C-scan imaging and modulus mapping of tissues.

Main Methods:

• A novel ultrasound indentation system employing a water jet as both indenter and ultrasound medium.
• High-frequency focused transducer for microscopic indentation deformation measurement.
• Application of varying pressures during C-scan sequences to generate modulus images.

Main Results:

• The system effectively assessed tissue-mimicking phantoms with varying stiffness.
• Demonstrated capability for rapid and convenient C-scan imaging of soft tissues.
• Preliminary results on gel phantoms showed potential for modulus imaging.

Conclusions:

• The novel water jet ultrasound indentation system is a promising tool for non-invasive tissue characterization.
• The system offers advantages in speed, convenience, and resolution for mechanical property assessment.
• Further studies are warranted to explore its full potential in clinical applications.