Title :
A coaxial antenna with miniaturized choke for minimally invasive interstitial heating
Author :
Longo, Iginio ; Gentili, G. Biffi ; Cerretelli, Matteo ; Tosoratti, Nevio
Author_Institution :
CNR, Pisa, Italy
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.
Keywords :
biomedical equipment; coagulation; hyperthermia; inductors; microwave antennas; microwave heating; radiation therapy; 2450 MHz; back heating effects reduction; coaxial antenna; main technical features; microwave interstitial coagulative therapy; miniaturized choke; miniaturized sleeve choke; minimally invasive interstitial heating; minimally invasive medical applications; numerical simulations; Back; Biomedical equipment; Coaxial components; Electromagnetic heating; Inductors; Medical services; Medical treatment; Microwave antennas; Minimally invasive surgery; Numerical simulation; Computer Simulation; Electric Impedance; Electrocoagulation; Electromagnetic Fields; Equipment Design; Equipment Failure Analysis; Heat; Microwaves; Models, Biological; Needles; Neoplasms; Quality Control;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2002.807320
