C-plane Reconstructions from Sheaf Acquisition for Ultrasound Electrode Vibration Elastography

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Ultrasound Technology

Background:

• Tissue ablation is a crucial medical procedure.
• Accurate visualization of ablated volumes is essential for treatment efficacy and safety.
• Current methods for visualizing ablated regions have limitations.

Purpose of the Study:

• To develop and validate a novel algorithm for reconstructing and visualizing ablated volumes using radiofrequency ultrasound (RF US) echo data.
• To employ electrode vibration elastography (EVE) to generate and track shear waves for improved ablation zone characterization.
• To enable 3D visualization of ablated regions for enhanced clinical assessment.

Main Methods:

• Utilized RF US echo data acquired with the EVE approach, where an ablation needle actuator generates shear wave pulses.
• Tracked shear wave propagation in ultrasound image planes to reconstruct shear wave velocity (SWV) maps.
• Proposed a C-plane reconstruction algorithm to estimate SWV values on transverse planes, enabling 3D visualization of ablated volumes.

Main Results:

• Experimental validation using a tissue-mimicking phantom demonstrated the algorithm's efficacy.
• Shear wave velocity estimates were within 20% of those obtained from a clinical scanner.
• Achieved a contrast of over 4 dB between stiff and soft regions, indicating good differentiation of tissue properties.

Conclusions:

• The proposed C-plane reconstruction algorithm effectively visualizes ablated volumes using EVE-derived SWV data.
• This novel approach offers accurate and detailed 3D reconstruction of ablation zones.
• The method shows promise for improved monitoring and assessment of thermal ablation procedures in clinical settings.