A perfused tissue phantom, for ultrasound hyperthermia.

Area of Science:

• Biomedical Engineering
• Medical Physics
• Thermal Medicine

Background:

• Accurate assessment of ultrasound hyperthermia applicator performance is crucial for effective cancer treatment.
• Existing tissue phantoms often lack the biological realism needed for comprehensive testing.
• Developing more representative phantoms is essential for advancing hyperthermia technology.

Purpose of the Study:

• To investigate the utility of a perfused porcine kidney as a realistic tissue phantom for evaluating ultrasound hyperthermia applicators.
• To assess the feasibility of using a fixed kidney preparation for analyzing applicator heating performance.

Main Methods:

• A fixed porcine kidney was prepared as a tissue phantom.
• Thermocouples were strategically placed throughout the kidney tissue.
• The phantom was perfused with degassed water at a variable flow rate.
• An unfocused multielement ultrasound applicator was used for insonation, and temperature data were recorded.

Main Results:

• The perfused kidney phantom demonstrated the ability to simulate realistic tissue conditions.
• Temperature distributions within the phantom were successfully recorded during ultrasound exposure.
• The preparation provided a viable method for assessing applicator heating patterns.

Conclusions:

• The fixed, perfused porcine kidney serves as a more realistic tissue phantom compared to previous models.
• This preparation offers a valuable tool for analyzing the heating performance of ultrasound hyperthermia applicators.
• The study highlights the potential of this phantom for improving the testing protocols in hyperthermia research.