A Dual-Slot Microwave Antenna for More Spherical Ablation ... Microwave ablation zones were created by using dual-slot and monopole control antennas for 2, 5, and 10 minutes at 50 and 100 W in ex vivo bovine livers. Dual-slot and monopole antennas were then used to create ablation zones at 100 W for 5 minutes in in vivo porcine livers, which also underwent intraprocedural imaging. (PDF) A Novel Microwave Coaxial Slot Antenna for Liver ... PDF | This paper is on the effect of a T-ring shape structure to enhance the capability of a microwave coaxial slot antenna (MCA) in the treatment of liver cancer. The MCA is composed of an ...
Microwave ablation (MWA) is a promising thermal therapy that uses heat to kill tumors. A large ablation zone with high circularity is desirable in clinical setting because most tumors are nearly spherical shapes. Single or multiple slot antennas are favored in MWA due to their good clinical outcomes, small dimensions and easy fabrication.
The microstrip antenna or radiator used for microwave transmission and receiving is conventionally known in the art to comprise a planar or curved radiating element of a specific shape and size overlaying and separated from a ground plane. Levels of detail analysis of microwave scattering from human… Similarly in the case of a complex location 2, the E-Norm absolute difference between both head models at the center of stroke circle was calculated as 0.04236 V/m and the same was maximum as well. 2018 IEEE International Symposium on Antennas and Propagation…
Antenna design for microwave hepatic ablation using an axisymmetric ...
A coaxial-slot antenna for invasive microwave Invasive microwave radiative antenna is different from other antennas which are utilized on the humanbody’s superficial surface.In order to investigate the distribution of thermal field and optimum antennal pattern in invasive microwave thermal therapy better, the invasive coaxial- slot antenna in...
We present a new coax-fed interstitial antenna for generating directional heating patterns during microwave ablation. The antenna comprises a base-fed monopole wherein a portion of the outer ...
Dual-slot antennas for microwave tissue heating: Parametric design ... Purpose: Design and validate an efficient dual-slot coaxial microwave ablation antenna that produces an approximately spherical heating pattern to match the ... Antenna Designs for Microwave Tissue Ablation - NCBI
Dumbbell shaped Defected Ground Structure for Microstrip…
To compare the performance of a microwave antenna design with two annular slots to that of a monopole antenna design in creating a more spherical ablation zone. A dual-slot antenna comprising two coaxial, annular slots at the distal tip was recently shown to inhibit proximal electric field A Hybrid Slot/Monopole Antenna With Directional Heating … We present a new coax-fed interstitial antenna for generating directional heating patterns during microwave ablation. The antenna comprises a base-fed monopole wherein a portion of the outer Large and round ablation zones with microwave ablation: A … Microwave ablation (MWA) is a promising thermal therapy that uses heat to kill tumors. A large ablation zone with high circularity is desirable in clinical setting because most tumors are nearly spherical shapes. Single or multiple slot antennas are favored in MWA due to their good clinical outcomes, small dimensions and easy fabrication. Antenna design for microwave hepatic ablation using an … Feb 27, 2006 · An axisymmetric finite element method (FEM) model was employed to demonstrate important techniques used in the design of antennas for hepatic microwave ablation (MWA). To effectively treat deep-seated hepatic tumors, these antennas should produce a highly localized specific absorption rate (SAR) pattern and be efficient radiators at approved generator frequencies.
With reference to FIG. 1, a microwave ablation (MWA) antenna 100 is connected to and fed by a coaxial cable 102 that provides electromagnetic energy to antenna 100 at a selected operating frequency f 0. MWA can be used to provide thermal therapy for treatment of various types of cancer 108 in various tissue/organs 106. TRIAXIAL ANTENNA FOR MICROWAVE TISSUE ABLATION - NeuWave ... The catheter could be a triaxial microwave catheter or other microwave antenna including center-fed dipole, dual-feed slot, segmented, or other microwave antennas. In this embodiment, the microwave power source comprises a co-axial cable for feeding microwave power to the antenna. BioMedical Engineering OnLine BioMed Central BioMedical Engineering OnLine Research Open Access Antenna design for microwave hepatic ablation using an axisymmetric electromagnetic model John M Bertram1, Deshan Yang2, Mark C Converse3, John G Webster*1 and David M Mahvi3