Cooled microwave transrectal applicator with adjustable directional beam for prostate treatment.
Int J Hyperthermia
; 11(1): 95-108, 1995.
Article
em En
| MEDLINE
| ID: mdl-7714374
ABSTRACT
A new intracavitary applicator design for microwave hyperthermia, particularly for transrectal prostate treatment, is presented. It includes an exchangeable multisection antenna that enables us to create a required longitudinal heating pattern, a cooling system to shift the maximum temperature away from the surface and a microwave reflecting system embedded in the cooling system that allows one to shape the irradiation beam in a transverse direction. Independent control of the longitudinal and transverse irradiation patterns of the applicator along with the cooling system, enable precise heating of selected tissues. Results of SAR measurements, E-field measurements and steady state temperature distributions, in solid and liquid tissue-equivalent phantoms are presented. Clinical performance of this applicator was evaluated earlier in patients heated intraoperatively and in a phase I clinical study. The applicator was found capable of effectively heating a tissue volume extending radially 3-25 mm from the applicator surface, angularly defined by configuration of reflecting system and longitudinally determined by specific choice of the multisection antenna.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças Prostáticas
/
Hipertermia Induzida
Limite:
Animals
/
Humans
/
Male
Idioma:
En
Revista:
Int J Hyperthermia
Ano de publicação:
1995
Tipo de documento:
Article