Experimental Evidence of Generation and Reception by a Transluminal Axisymmetric Shear Wave Elastography Prototype

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Materials Science

Background:

• Elastography is crucial for tissue characterization.
• Current methods often rely on external ultrasound probes.
• A transluminal approach offers potential for internal imaging.

Purpose of the Study:

• To present experimental evidence for a novel non-ultrasonic transluminal elastography probe.
• To demonstrate the probe's capability in generating and detecting shear waves within a lumen.
• To validate the probe's performance against established imaging techniques.

Main Methods:

• Developed a probe with an electromagnetic rotational actuator for shear wave generation.
• Utilized four piezoelectric receivers for wave detection along the lumen wall.
• Tested the prototype in soft-tissue phantoms with lumen-like conduits and inclusions.
• Employed ultrafast ultrasound imaging for displacement field estimation and comparison.

Main Results:

• The transluminal probe successfully generated and detected shear waves.
• Reflections from stiffer inclusions within the phantoms were identified.
• Experimental results from the transluminal probe showed good agreement with ultrafast ultrasound imaging.
• Shear wave speed characterization was performed using shear wave elastography.

Conclusions:

• The study provides proof-of-concept for the transluminal elastography probe.
• The non-ultrasonic approach is viable for internal tissue characterization.
• Further research into clinical applications of this transluminal probe is warranted.