Related Experiment Video
Updated: Apr 27, 2026
06:25
Cooling or Warming the Esophagus to Reduce Esophageal Injury During Left Atrial Ablation in the Treatment of Atrial Fibrillation
Published on: March 15, 2020
12.9K
Temperature rise in tissue ablation using multi-frequency ultrasound.
Summary
Multi-frequency high-intensity focused ultrasound (HIFU) enhances tissue heating and ablation effectiveness. This study shows multi-frequency HIFU leads to faster temperature rises and improved cavitation, promising for noninvasive surgery.
Area of Science:
- Medical Physics
- Biomedical Engineering
- Acoustic Surgery
Background:
- High-intensity focused ultrasound (HIFU) is a key noninvasive surgical technique.
- Challenges remain in precise temperature control and avoiding unintended tissue heating during HIFU procedures.
Purpose of the Study:
- To investigate the effectiveness of multi-frequency HIFU for tissue ablation.
- To compare the thermal effects and cavitation characteristics of single-frequency versus multi-frequency HIFU.
Main Methods:
- Experiments involved heating chicken breast tissue using single-, dual-, and tri-frequency HIFU configurations (950 kHz, 1.5 MHz, 3.3 MHz).
- Temperature changes were recorded, and cavitation pressure fields were analyzed.
- Simulations were performed for acoustic and bio-heating temperature fields.
Main Results:
- Multi-frequency HIFU demonstrated 5% to 10% greater temperature rises compared to single-frequency modes.
- Enhanced cavitation was observed with multi-frequency ultrasound.
- Experimental and simulation results correlated, supporting the findings.
Conclusions:
- Multi-frequency HIFU is more effective for rapid tissue heating and ablation.
- Enhanced cavitation likely contributes to the improved tissue ablation efficacy of multi-frequency HIFU.
- These findings offer a promising advancement for HIFU applications in noninvasive surgery.
