title: Development and microwave analysis of slot antennas for localized hyperthermia treatment of hepatocellular liver tumor.
abstract: Slot antennas are often considered as a suitable choice for microwave ablation due to design simplicity, low cost to manufacture and a highly confined temperature profile. In this paper, an iterative coupled thermal/microwave numerical formulation is presented to analyze and develop miniature slot antenna geometries for localized liver cancer treatment. The thermal solver determines the specific absorption rate (SAR) as a pre-processing step to determine the temperature distribution profile within malignant tissues. The microwave solver uses this computed thermal solution together with related boundary/sub-domain settings to determine complex propagation wave number as an Eigen value. The desired microwave response in terms of insertion loss <0.1 dB, VSWR 1:1.1, and return loss less than -22 dB was achieved at 2.45 GHz. The simulated results agree well with the measured response.
authors.affiliation: Department of Economics, Government College University, Lahore, Pakistan.
authors.forename: T
authors.initials: T
authors.lastname: Zafar
authors.forename: J
authors.initials: J
authors.lastname: Zafar
authors.forename: H
authors.initials: H
authors.lastname: Zafar
mesh_terms: D065638:Absorption, Radiation; D001831:Body Temperature / Q000528:radiation effects; D006528:Carcinoma, Hepatocellular / Q000503:physiopathology* / Q000628:therapy*; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D006979:Hyperthermia, Induced / Q000295:instrumentation* / Q000379:methods; D008113:Liver Neoplasms / Q000503:physiopathology* / Q000628:therapy*; D008872:Microwaves / Q000627:therapeutic use; D008954:Models, Biological; D014159:Transducers