A new capacitive heating applicator for the simultaneous radiohyperthermotherapy of superficial and shallow-seated tumors.

A. Tanaka, Masahiro Kuroda, K. Inamura, S. Kawasaki, Y. Hiraki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

External capacitive heating is the usual method of electromagnetic wave heating, in which the tumor is caught and heated between two opposite applicators. Using a phantom, the authors developed and evaluated the performance of a new capacitive heating applicator designed for simultaneous radiohyperthermotherapy (SRH) in which the electron beam irradiation is provided from above an external capacitive heating applicator for the treatment of superficial and shallow-seated tumors. The trial applicator was constructed to fulfill the following conditions: 1. use of an electrode plate which does not affect the electron beam depth dose, 2. a uniform thickness to maintain flatness of the electron beam, and 3. a cooling function to prevent damage to normal skin tissue and enhance the therapeutic gain factor. This applicator was comprised of a 0.1-mm-thick copper electrode and a 5-mm-thick cooling chamber. The depth of the 80% dose of the new applicator was 21 mm with a 9-MeV electron beam and 36mm with a 15-MeV electron beam, which was comparable to the effect of a conventional irradiation bolus. The temperature distribution produced by the trial applicator was symmetrical on both sides from the center of the applicator. The 50% specific absorption rate region was 6.4 cm wide at a depth of 1 cm from the phantom surface and 2.8 cm wide at a depth of 3 cm. There have been no previous reports on the development of an external capacitive heating applicator designed for the SRH of superficial and shallow-seated tumors; this is the first such report.(ABSTRACT TRUNCATED AT 250 WORDS)

Original languageEnglish
Pages (from-to)211-216
Number of pages6
JournalActa Medica Okayama
Volume48
Issue number4
Publication statusPublished - Aug 1994

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Applicators
Heating
Tumors
Electrons
Electron beams
Neoplasms
Electrodes
Electromagnetic Radiation
Copper
Irradiation
Cooling
Skin
Temperature
Electromagnetic waves
Temperature distribution
Tissue

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

A new capacitive heating applicator for the simultaneous radiohyperthermotherapy of superficial and shallow-seated tumors. / Tanaka, A.; Kuroda, Masahiro; Inamura, K.; Kawasaki, S.; Hiraki, Y.

In: Acta Medica Okayama, Vol. 48, No. 4, 08.1994, p. 211-216.

Research output: Contribution to journalArticle

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