Development of electromagnetic phantom at low-frequency band

Area of Science:

• Biomedical Engineering
• Electromagnetics
• Human Body Modeling

Background:

• Conventional electromagnetic phantoms often fail to accurately represent the electrical properties of living tissues.
• Accurate electrical property simulation is crucial for developing and testing medical devices and imaging technologies.

Purpose of the Study:

• To develop an improved human electrical phantom with electrical properties closely matching those of a living body.
• To validate the phantom's performance across different frequency bands, particularly at low frequencies.

Main Methods:

• Modification of a conventional highly hydrous gel phantom by incorporating carbon microcoils (CMC) and sodium chloride (NaCl).
• Evaluation of the electrical properties of the modified phantom against established biological tissue data.
• Testing the phantom's performance in low-frequency bands and comparing it to conventional phantoms at higher frequencies (above 300 MHz).

Main Results:

• The newly developed phantom demonstrated electrical properties in good agreement with those of a living body at low frequencies.
• The phantom maintained effective functionality in the target low-frequency band through a simple modification mechanism.
• Performance at higher frequencies (above 300 MHz) was also evaluated, showing comparability to conventional phantoms.

Conclusions:

• The developed human electrical phantom offers a more accurate representation of living body electrical properties, especially at low frequencies.
• The incorporation of CMC and NaCl provides a simple yet effective method for enhancing phantom realism.
• This advancement facilitates more reliable testing and development of electromagnetic applications for medical use.