Formulas for preparing phantom muscle tissue at various radiofrequencies.

Area of Science:

• Biomedical Engineering
• Electromagnetics
• Materials Science

Background:

• Accurate simulation of biological tissues is crucial for developing and testing electromagnetic devices, particularly in medical applications.
• Understanding dielectric properties of phantom materials across various frequencies and temperatures is essential for reliable device performance evaluation.
• Existing phantom materials may not cover the broad range of frequencies and temperatures relevant to diverse applications.

Purpose of the Study:

• To determine the dielectric properties (dielectric constant and conductivity) of phantom materials designed to simulate high-water content biological tissues.
• To characterize these properties over a wide frequency spectrum (13.56–2,450 MHz) and at clinically relevant temperatures (15, 22, and 30°C).
• To provide a reliable dataset for the development and validation of electromagnetic devices operating at various radiofrequency and microwave frequencies.

Main Methods:

• Utilized an automated, temperature-controlled slotted line for precise dielectric property measurements.
• Formulated phantom materials using water, a gelling agent (TX-150), sodium chloride, and specific powders (polyethylene or aluminum) tailored to frequency ranges.
• Conducted measurements at multiple frequencies (13.56, 27.12, 40.68, 70, 100, 200, 300, 433, 750, 915, and 2,450 MHz) and temperatures (15, 22, 30°C).

Main Results:

• Successfully characterized the dielectric constant and conductivity of the developed phantom materials.
• Demonstrated the feasibility of simulating high-water content tissues using the specified ingredients across the tested frequency range.
• Obtained comprehensive data correlating dielectric properties with frequency and temperature variations.

Conclusions:

• The developed phantom materials accurately simulate the dielectric properties of high-water content tissues over a broad frequency range.
• The characterized dielectric data are valuable for the design, calibration, and testing of electromagnetic devices, including medical equipment.
• This study provides a foundational dataset for advancing research in bioelectromagnetics and related fields.