title: A coaxial antenna with miniaturized choke for minimally invasive interstitial heating.
abstract: We present a new coaxial antenna for microwave interstitial coagulative therapy, working at 2450 MHz and endowed with a miniaturized sleeve choke in order to reduce back heating effects and make the system response less dependent on the antenna insertion depth into the tissue; the way the choke is implemented makes the overall transversal size minimum and allows small adjustments of the choke section length even during operation. We describe the main technical features of the antenna and show experimental results clearly proving the choke effectiveness. Numerical simulations well agree with experimental data, confirming the suitability of the proposed device for minimally invasive medical applications.
authors.affiliation: IPCF, CNR-Area della ricerca di Pisa, 56124 Pisa, Italy.
authors.forename: Iginio
authors.initials: I
authors.lastname: Longo
authors.forename: Guido Biffi
authors.initials: GB
authors.lastname: Gentili
authors.forename: Matteo
authors.initials: M
authors.lastname: Cerretelli
authors.forename: Nevio
authors.initials: N
authors.lastname: Tosoratti
mesh_terms: D003198:Computer Simulation; D017097:Electric Impedance; D004564:Electrocoagulation / Q000295:instrumentation* / Q000379:methods; D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006358:Hot Temperature / Q000627:therapeutic use*; D008872:Microwaves / Q000627:therapeutic use*; D008954:Models, Biological; D009339:Needles; D009369:Neoplasms / Q000628:therapy; D011786:Quality Control