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Practical induction heating coil designs for clinical hyperthermia with ferromagnetic implants
P R Stauffer1, P K Sneed, H Hashemi
1Radiation Oncology Dept. University of California, San Francisco 94143-0226.
IEEE Transactions on Bio-Medical Engineering
|January 1, 1994
Summary
New induction heating coil designs improve magnetic field control for interstitial hyperthermia cancer treatment. This advancement enhances precision and safety for deep-seated tumor heating using ferromagnetic implants.
Area of Science:
- Biomedical Engineering
- Oncology
- Medical Physics
Background:
- Interstitial hyperthermia requires precise heating of deep-seated tumors.
- Magnetic induction heating of ferromagnetic implants is a promising technique.
- Existing coil designs may limit localization and control over heat distribution.
Purpose of the Study:
- To describe seven novel induction heating coil designs for ferromagnetic implants.
- To characterize coil effects on magnetic field uniformity and extent.
- To present electrostatic shield designs for patient safety.
Main Methods:
- Development and description of seven distinct induction heating coil configurations.
- Characterization of magnetic field distribution generated by each coil design.
- Evaluation of electrostatic shielding effectiveness to minimize electric field coupling.
Main Results:
- Detailed analysis of coil design impact on magnetic field strength and uniformity.
- Comparison of advantages and disadvantages for each coil type (efficiency, radiated fields, usability).
- Identification of suitable applications for each coil design based on performance.
Conclusions:
- The developed armamentarium of induction coils enables customized magnetic field generation.
- Improved energy coupling to ferromagnetic implants enhances treatment efficacy for various depths and orientations.
- Optimized coil selection promises simplified patient setup, increased safety, and expanded treatment possibilities.