Magnetic nanoparticles hyperthermia in a non-adiabatic and radiating process

Area of Science:

• Thermodynamics
• Biomedical Engineering
• Materials Science

Background:

• Magnetic nanoparticle hyperthermia is a promising cancer treatment.
• Accurate measurement of energy deposition is crucial for treatment efficacy.
• Existing models often neglect heat loss mechanisms, affecting accuracy.

Purpose of the Study:

• To develop a thermodynamic theoretical approach for magnetic nanoparticle hyperthermia.
• To experimentally validate the approach using magnetite and magnesium ferrite nanoparticles.
• To enhance the accuracy of specific loss power determination and understand thermal parameters.

Main Methods:

• Calorimetric method for measuring heat.
• Theoretical modeling from a thermodynamic perspective.
• Experimental analysis of magnetic nanoparticles (magnetite, magnesium ferrite) in water under an alternating magnetic field.

Main Results:

• Accurate estimation of specific loss power considering non-adiabatic and radiating processes.
• Provided physical meaning and experimental determination for the effective thermal conductance parameter.
• Demonstrated the significant impact of heat loss due to thermal radiation on experimental results.

Conclusions:

• The proposed thermodynamic approach enhances the accuracy of magnetic hyperthermia assessments.
• Accounting for heat loss is essential for precise determination of specific loss power and effective thermal conductance.
• This work offers a more robust understanding of thermal dynamics in magnetic nanoparticle hyperthermia.