Interstitial antennas tipped with reactive load

Ahn, Hyeong-Joon; Lee, Kwyro

doi:10.1109/lmwc.2004.842826

Cited by 7 publications

(4 citation statements)

References 10 publications

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“…However, they are relatively narrowband and radiation can be prone to hot-spots or elongated patterns. Tip loading can be used to increase the electrical length of an antenna or alter its heating characteristics 55, 56…”

Section: Microwave Ablation Technologymentioning

confidence: 99%

Microwave Tissue Ablation: Biophysics, Technology, and Applications

Brace

2010

Crit Rev Biomed Eng

273

214

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Microwave ablation is an emerging treatment option for many cancers, cardiac arrhythmias and other medical conditions. During treatment, microwaves are applied directly to tissues to produce rapid temperature elevations sufficient to produce immediate coagulative necrosis. The engineering design criteria for each application differ, with individual consideration for factors such as desired ablation zone size, treatment duration, and procedural invasiveness. Recent technological developments in applicator cooling, power control and system optimization for specific applications promise to increase the utilization of microwave ablation in the future. This article will review the basic biophysics of microwave tissue heating, provide an overview of the design and operation of current equipment, and outline areas for future research for microwave ablation.

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Section: Microwave Ablation Technologymentioning

confidence: 99%

Microwave Tissue Ablation: Biophysics, Technology, and Applications

Brace

2010

Crit Rev Biomed Eng

273

214

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“…Instead of conventional coaxial monopole antennas [5], coaxial dipole antennas [6] to [9], two-slot coaxial antennas [10], and capacitive loading coaxial antennas [11] are proposed. Coaxial dipole antennas include antennas that applied a choke structure to improve impedance characteristics (to minimize the return loss) [8], [9].The capacitive coaxial antenna must have a flat tip and is not suitable for use inside tissue.…”

Section: Introductionmentioning

confidence: 99%

“…It can be applied to cancers in inside of tissue while retaining the features mentioned in the ref. [11]. We measured the temperature rise the liver phantom to establish that using propose antenna is control in the direction of inserted compared with a conventional antenna having a whole conductor needle [12].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of heating characteristics in a new microwave coaxial-slot antenna for cancer therapy

Michiyama

Asanuma²,

Kuwano

2010

2010 International Conference on Electromagnetics in Advanced Applications

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We previously proposed a new coaxial-slot antenna of not whole conductor needle but one sandwiched dielectric between conductors for cancer therapy. The heating of the antenna was possessed of suppressed extension in the direction of the tip compared with that of the antenna of whole conductor needle, as a result of the experiment of liver phantom. In this paper, we calculate the heating characteristics of the antenna in the liver model. It is shown that the heating pattern is similar to the measured one although the value is different.

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“…Almost perfect matching and desirable SAR distribution [12] are considered to reduce damage and two types of capacitive loads are adopted for the purpose. One is tipped at the end of the antennas, which helps almost perfect matching possible.…”

Section: Introductionmentioning

confidence: 99%