Electrical Property Enhancement of a Breast-Fat-Equivalent Phantom for Microwave Mammography

Area of Science:

• Biomedical Engineering
• Medical Imaging Physics

Background:

• Breast cancer is a leading global cancer in women.
• Conventional screening methods like mammography have limitations.
• Microwave mammography requires accurate electromagnetic phantoms for development.

Purpose of the Study:

• To develop an improved electromagnetic phantom for microwave mammography.
• To enhance the accuracy of phantom electrical properties mimicking human tissue.

Main Methods:

• Modified phantom material composition and additives.
• Measured electrical properties (permittivity, conductivity) using a network analyzer and dielectric probe.
• Employed the coaxial probe method for electrical property assessment.

Main Results:

• Increased phantom conductivity by adding sodium chloride (NaCl) to address prior error rates.
• Investigated the impact of cooking oil, TX-151, and detergent on electrical properties.
• Achieved average error rates of 8.26% for relative permittivity and 16.9% for conductivity.

Conclusions:

• The refined phantom formulation shows improved agreement with target electrical properties.
• This advancement supports the development and validation of microwave mammography technology.
• The study highlights the importance of precise phantom characterization for medical imaging applications.