2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), Rome, Italy, 28 Aug.-4 Sept. 2021

Year: 2021

Type: conference-proceeding

Authors: Vincenza Portosi, Antonella M. Loconsole, Marcello Valori, Valeria Marrocco, Francesco Bonelli, Giuseppe Pascazio, Vito Lampignano, Antonella Fasano, Roberto Lorusso, Francesco Prudenzano

Keywords: Microwave antennas,Performance evaluation,Applicators,Medical treatment,Prototypes,Microwave devices,Needles

In this paper, the design and optimization of a low-cost needle microwave applicator for cancer therapy is illustrated. An adequately sized coaxial antenna inserted into a thin hypodermic needle, is optimized in the Industrial, Scientific and Medical frequency band (ISM) at f = 2.45 GHz. An extensive feasibility investigation is performed in order to obtain an efficient, mini-invasive and low-cost microwave medical device. Several technical solutions are explored and the optimization of a number of needle microwave applicators is performed. The performance of the applicators is evaluated in terms of antenna impedance matching, specific absorption rate (SAR), temperature distribution, and ablation zone sizes. After a comparison, a 14 gauge (14G) and a 16 gauge (16G) prototypes are fabricated and characterized.