title: Enhancing the properties of beam forming bolus in hyperthermia: numerical simulation and empirical verification.
abstract: In this paper we present a simulation study of the induced specific absorption rate (SAR) within the phantom produced by radiofrequency radiation from a 8 MHz capacitive applicator. The main focus of the current study is on demonstrating the beam shaping properties of the bolus system as well as its effect on controlling the therapeutic area. Different electrical conductivities and geometries of the bolus were considered in the simulation of induced SAR distributions in a muscle-equivalent model with uniform dielectric properties. To validate the presented model, we carried out a comparison between the SAR simulation results and the temperature measurements in an agar split-phantom and an excellent agreement was observed.
authors.affiliation: Department of Engineering, Science and Research Branch, Islamic Azad University, 14155-775, Tehran, 14778 93855, Islamic Republic of Iran, ali_aghayan@ymail.com.
authors.forename: Seyed Ali
authors.initials: SA
authors.lastname: Aghayan
authors.forename: Dariush
authors.initials: D
authors.lastname: Sardari
authors.forename: Seied Rabi Mehdi
authors.initials: SR
authors.lastname: Mahdavi
authors.forename: Maryam
authors.initials: M
authors.lastname: Mohammadi
mesh_terms: D003198:Computer Simulation; D006801:Humans; D006979:Hyperthermia, Induced / Q000379:methods*; D008954:Models, Biological; D009369:Neoplasms / Q000503:physiopathology* / Q000628:therapy*; D011829:Radiation Dosage; D000078702:Radiofrequency Therapy; D013813:Therapy, Computer-Assisted / Q000379:methods*