title: Microwave transurethral applicator with helix-loaded-dipole-antenna (HLDA) for prostate treatment.
abstract: Three designs of transurethral applicators have been analysed to find the one that is best able to selectively heat the desired volume of prostate. A helix-loaded-dipole-antenna (HLDA) inserted into a Foley type catheter was found to be the most promising design. A change in the heat deposition pattern of the antenna depending on prostate size is possible by moving the position of the antenna within a Foley catheter. A number of prototypes of HLDA were manufactured and tested to optimize their design. These tests were performed in solid and liquid phantoms and in laboratory animals. Intra-operative measurements of intra-prostatic temperature distribution were also performed. A comparison of the HLDA with other commercially available transurethral applicators and the published data showed that the present design has a higher linear homogeneity coefficient and a better heat deposition in the prostate.
authors.affiliation: Department of Microwave Technique and Optical Communication, Faculty of Electronics, Telecommunications and Informatics, Politechnika Gdanska, Poland.
authors.forename: P S
authors.initials: PS
authors.lastname: Debicki
authors.forename: A
authors.initials: A
authors.lastname: Haczewski
authors.forename: L V
authors.initials: LV
authors.lastname: Baert
authors.forename: Z
authors.initials: Z
authors.lastname: Petrovich
mesh_terms: D000818:Animals; D006801:Humans; D006979:Hyperthermia, Induced / Q000295:instrumentation*; D008297:Male; D008872:Microwaves; D011471:Prostatic Neoplasms / Q000628:therapy*; D014513:Ureter