Slot antenna for microwave ablation

1. Dualslot antennas for microwave tissue heating: Parametric.
2. A Hybrid Slot/Monopole Antenna With Directional Heating.
3. A multi-slot coaxial microwave antenna for liver tumor ablation.
4. Helical Slot Antenna for the Microwave Ablation - ResearchGate.
5. MICROWAVE ABLATION THERAPY FOR THE TREATMENT OF.
6. Model and Simulation of Microwave Ablation with Single Antennas on.
7. Theoretical evaluation of the treatment effectiveness of a novel.
8. Antenna design for microwave hepatic ablation using an.
9. graphene-based_microwave_coaxial_antenna_for_microwave" title="Graphene-based microwave coaxial antenna for microwave...">Graphene-based microwave coaxial antenna for microwave.">Graphene-based microwave coaxial antenna for microwave...">Graphene-based microwave coaxial antenna for microwave.
10. A dual-slot microwave antenna for more spherical ablation zones: ex.
11. A coaxial slot antenna with frequency of 433 MHz for microwave.
12. Finite Element Analysis of Single Slot Antenna for Microwave Tumor Ablation.
13. Helical Slot Antenna for the Microwave Ablation - Hindawi.
14. Design of a dual slot antenna for small animal microwave.

Dualslot antennas for microwave tissue heating: Parametric.

Axial and radial schematics of a coaxial-based double slot choked antenna designed for hepatic microwave ablation MWA. In a study, some designs of this type of antenna have been discussed and have optimized the position of the metallic choke by using finite element method FEM electromagnetic simulations to achieve the minimum power. Sep 6, 2018 This paper presents a compact multi-slot coaxial microwave antenna with an impedance matching network for liver tumor ablation. The proposed antenna aims to create near-spherical ablation zones and proper impedance matching to the target tumor tissue without damaging the surrounding healthy tissues. Reconfigurable tapered coaxial slot antenna for hepatic microwave ablation Microwave ablation is rapidly being rediscovered and developed for treating many cancers of liver, lung, kidney and bone, as well as arrhythmias and other medical conditions. The microwaves ablate tissue by heating it to cytotoxic temperatures.

A Hybrid Slot/Monopole Antenna With Directional Heating.

The closed dual-slot antenna generated a more spherical ablation zone 34.0 mm 37.2 mm vs. 29.1 mm 48.5 mm at 50 W for 10 min with a lower reflection coefficient 30.3 vs. 9.5 dB than did conventional dual-slot antenna, and showed qualified mechanical properties for clinical application, which may be further applied to clinical. Aug 20, 2016 Design of a dual slot antenna for small animal microwave ablation studies Abstract: This study presents the development of a dual-slot antenna for small animal tumor ablation. By using a dual-slot design at 8 GHz, it was hypothesized that smaller and more spherical ablations can be produced.

A multi-slot coaxial microwave antenna for liver tumor ablation.

A Novel Microwave Coaxial Slot Antenna for Liver Tumor Ablation Authors: Hulusi Acikgoz Ibrahim Turer Abstract and Figures This paper is on the effect of a T-ring shape structure to enhance the. 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. Sep 6, 2018 Abstract. This paper presents a multi-slot coaxial antenna with a pi impedance matching network for liver tumor ablation. A multi-slot radiating probe was optimized by using the modified genetic algorithm to produce a near-spherical heating zone with significantly increased possibility of conformal treatment. A pi impedance matching network was.

Helical Slot Antenna for the Microwave Ablation - ResearchGate.

. The results show that the heat dissipation is concentrated around the slots region of cancerous tissue and a higher necrotic tissue ratio can be achieved with a graphene-covered double slot antenna in a shorter time. Keywords Microwave cancer ablationcoaxial antennabackward heatingsurface current suppressiongraphene Type.

MICROWAVE ABLATION THERAPY FOR THE TREATMENT OF.

Microwave ablation MWA by using coaxial antennas is a promising alternative for breast cancer treatment. A double short distance slot coaxial antenna as a newly optimized applicator for minimally invasive treatment of breast cancer is proposed. Jul 6, 2015 ablation zone without requiring any additional adjustable structures. The tapering of the slot in coaxial antenna generates current distribution at the edges of the slot for maximizing..

Model and Simulation of Microwave Ablation with Single Antennas on.

The model was simulated at multiple discrete lengths of slot between 2.5mm and 4.5mm, using 0.1mm increment to determine the antenna efficiency. The antenna has a reflection coefficient as.

Theoretical evaluation of the treatment effectiveness of a novel.

Jul 16, 2015 To build the antenna, a small ring slot of a specified width is cut on the outer conductor, close to the short-circuited distal tip of the antenna to allow electromagnetic wave propagation into the tissue. This design used a 1 mm wide slot, which can be easily fabricated. Jun 8, 2017 A prototype of this antenna, designed to operate at 7 GHz in egg white, was fabricated and used to perform ablation experiments at a power level of 20 W for 5 min. Experimental results agree well with simulations and confirm the capability of the antenna for generating directional heating patterns. Microwave ablation has emerged as advanced modality for hepatic tumor management [].During MWA administration antenna radiator is inserted into the target organ guided through CT guidance and typical treatment durations vary between 3 to 12 min [].The antenna architectures employed in microwave ablation offer a minimally invasive solution for cases where there exists insufficient hepatic.

Antenna design for microwave hepatic ablation using an.

Feb 27, 2006 An axisymmetric electromagnetic model of the double slot choked antenna used for hepatic microwave ablation MWA. a FEM model. b Logarithmic SAR distribution. Results were normalized using the maximum SAR obtained. Full size image. Jun 28, 2011 Purpose: Design and validate an efficient dual-slot coaxial microwave ablation antenna that produces an approximately spherical heating pattern to match the shape of most abdominal and pulmonary tumor targets.Methods: A dual-slot antenna geometry was utilized for this study. Permutations of the antenna geometry using proximal and distal slot. Slot antennas are very popular microwave antennas, and slotted waveguides are used for high frequency radar systems. A thin slot in an infinite ground plane is the complement to a dipole in free space. This was described by H.G. Booker, who extended Babinet#x27;s principle from optics to show that the slot will have the same radiation pattern as a dipole such that the E and H fields are swapped.

Graphene-based microwave coaxial antenna for microwave...">Graphene-based microwave coaxial antenna for microwave.

A Compact Slot-Loaded Antipodal Vivaldi Antenna for a Microwave Imaging System to Monitor Liver Microwave Thermal Ablation Abstract: This study presents the design and the experimental validation of a slot-loaded antipodal Vivaldi antenna. Model and Simulation of Microwave Ablation with Single Antennas on Irregular Hepatic Cancerous Tissue | SpringerLink Yonghua Lao 12, Tianqi Zhang 13, Jinhua Huang 13 amp; R. Yang 12, 14 Conference paper First Online: 10 November 2019 Irregular hepatic cancerous tissue Microwave ablation Model and simulation Treatment planning. Apr 1, 2021 Large and round ablation zones with microwave ablation: A preliminary study of an optimal aperiodic tri-slot coaxial antenna with the pi-matching network section Int J Therm Sci , 140 2019 , pp. 539 - 548.

A dual-slot microwave antenna for more spherical ablation zones: ex.

The goal of this paper is to measure the therapeutic temperatures and the viability of a double slot antenna designed to treat bone tissue by microwave ablation. The antenna at an operating frequency of 2.45 GHz was designed, modeled, constructed, and experimentally evaluated. To avoid the damage of normal tissue or blood vessels, for a specific hepatic tumor in a living body, a dedicated microwave ablation antenna should be designed to kill the tumor thoroughly. Based on the development of antenna and medical imaging technology, this goal will be realized in the near future [4], [15], [18], [20], [25]. To design the.

A coaxial slot antenna with frequency of 433 MHz for microwave.

We propose an interstitial coaxial antenna with a choke embedded in the outer conductor and with an arrowhead cap for microwave ablation therapy, operating at 2.45 GHz. The cap consists of. In this study, thermal behavior of three types of slot-coaxial antennas for breast cancer microwave ablation is presented. By using finite element method FEM, all antennas were modeled to estimate the heat transfer in breast tumor tissue surrounded by healthy breast tissue.

Finite Element Analysis of Single Slot Antenna for Microwave Tumor Ablation.

. This principle relates the radiated fields and impedance of an aperture or slot antenna to that of the field of its dual antenna. The dual of a slot antenna would be if the conductive material and air were interchanged - that is, the slot antenna became a metal slab in space. An example of dual antennas is shown in Figure 2: Figure 2. Dual.

Helical Slot Antenna for the Microwave Ablation - Hindawi.

A new coaxial double slot antenna for microwave ablation therapy has been proposed in this research paper. The paper represents heating characteristics, temperature distribution pattern and finite element meshing analyses at frequency of 2.45GHz and at a power of 10 Watt. A compact 10-slot microwave antenna with an impedance -matching network was designed to create predictable, optimal heating patterns with shorter ablation times and lower input powers, compared to previously developed antennae [52,53,54]. The required ablation shape was achieved by adopting the distance between the adjacent slots and the. Aug 1, 2013 The dual-slot microwave antenna created a more spherical ablation zone than did the monopole antenna both in vivo and ex vivo liver tissue. Greater control over power delivery can potentially extend the advantages of the dual-slot antenna design to higher power and longer treatment times. RSNA, 2013 Article History.

Design of a dual slot antenna for small animal microwave.

See full list on. Jan 1, 2017 The coaxial-slot antenna with single radiating aperture has been expanded into proposed multi-slot coaxial antenna with periodic slots as illustrated in Fig. 1. The microwave antenna is composed of two coaxial conductors separated by the dielectric with a 50-ohm feed, which are enclosed together in plastic catheter for their protection. Oct 30, 2019 In this study, a thin coaxial antenna for microwave ablation MWA is proposed. A helical slot is added between two slots in order to overcome the disadvantage of the radiation range.

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