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Related Experiment Videos

Spiral microstrip hyperthermia applicators: technical design and clinical performance.

T V Samulski1, P Fessenden, E R Lee

  • 1Department of Radiation Oncology, Stanford University School of Medicine, CA.

International Journal of Radiation Oncology, Biology, Physics
|January 1, 1990
PubMed
Summary

Spiral microstrip microwave antennas are effective clinical hyperthermia applicators for superficial tumors. Over 500 patient treatments demonstrate their suitability, heating performance, and efficiency.

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Area of Science:

  • Medical physics
  • Biomedical engineering
  • Oncology

Background:

  • Microwave (MW) antennas are adapted as clinical hyperthermia applicators.
  • Configurations include single fixed, multi-element arrays, and scanned antennas to expand heating area.

Purpose of the Study:

  • To evaluate spiral microstrip microwave antennas as clinical hyperthermia applicators.
  • To assess heating performance and clinical suitability for tumor treatment.

Main Methods:

  • Developed and configured spiral microstrip microwave antenna applicators.
  • Measured specific absorption rate (SAR) distributions in phantom using the bioheat equation.
  • Analyzed clinical treatment data from over 500 patients.

Main Results:

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  • Various configurations allowed for expanded effective heating areas.
  • SAR distributions estimated heating depth and volume in uniformly perfused tissue.
  • Clinical data confirmed good microwave coupling efficiency and compact applicator size.

Conclusions:

  • Spiral microstrip microwave antennas are suitable for clinical hyperthermia.
  • The technology has been successfully used in over 500 patient treatments for localized superficial tumors.
  • Efficient coupling and compact design are key clinical advantages.